Compound, material for organic electroluminescent element, organic electroluminescent element and electronic device

Abstract

To provide a compound that improves performance of organic EL elements, an organic EL element with improved element performance, and an electronic device including the organic EL element.SOLUTION: The present invention provides a tri(p-phenylene) compound, represented by the compound of the following formula, and an organic electroluminescent element including the compound.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a compound, a material for an organic electroluminescence device, an organic electroluminescence device, and an electronic device including the organic electroluminescence device. [Background technology]

[0002] Generally, an organic electroluminescence element (hereinafter sometimes referred to as "organic EL element") is composed of an anode, a cathode, and an organic layer sandwiched between the anode and cathode. When a voltage is applied between the two electrodes, electrons are injected from the cathode side and holes are injected from the anode side into the light-emitting region, where they recombine to generate an excited state, and light is emitted when the excited state returns to the ground state. Therefore, the development of materials that efficiently transport electrons or holes to the light-emitting region and facilitate the recombination of electrons and holes is important for obtaining high-performance organic EL elements.

[0003] Patent Documents 1 to 5 disclose compounds used as materials for organic electroluminescence devices. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] US Patent Application Publication No. 2019 / 0237668 [Patent Document 2] Korean Patent Publication No. 10-2016-0035971 [Patent Document 3] International Publication No. 2020 / 004235 [Patent Document 4] International Publication No. 2021 / 177022 [Patent Document 5] International Publication No. 2021 / 107737 Summary of the Invention [Problem to be solved by the invention]

[0005] Although many compounds for organic EL devices have been reported, there is still a demand for compounds that further improve the performance of organic EL devices.

[0006] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a compound that further improves the performance of an organic EL element, an organic EL element having further improved element performance, and an electronic device including such an organic EL element. [Means for solving the problem]

[0007] The present inventors have conducted extensive research into the performance of organic EL devices containing the compounds described in the above patent documents and other compounds, and have found that monoamines represented by the following formulae (A) and (B) provide organic EL devices with improved device performance.

[0008] In one aspect, the present invention provides a compound represented by formula (A): [ka] (In formula (A), N * is the central nitrogen atom. Ar a1 represents a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms. Ar a2 is a group represented by the following formula (A1). [ka] (In formula (A1), *1 is L a2 is the binding site to A and B each independently represent a substituted or unsubstituted benzene ring, a substituted or unsubstituted naphthalene ring, or a substituted or unsubstituted phenanthrene ring; One selected from A and B is bonded to *2 via a single bond. La1 ~L a3 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 30 ring atoms. R a1 ~R a13 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905If there are two or more, there are two or more R 905 are the same as or different from each other. X a1 is an oxygen atom or a sulfur atom. However, L a2 and L a3 is an unsubstituted p-phenylene group, formula (A1) is the following formula (A1-1), and R a124 and R a125 When one selected from is a single bond bonded to *8, -L a1 -Ar a1 means, except for the unsubstituted p-biphenyl group, L a3 is a single bond, and L a2 is an unsubstituted o-phenylene group, and formula (A1) is the following formula (A1-2-1), R a131 ~R a133 , and R a135 ~R a140 One selected from is a single bond bonded to *10. [ka] (In formula (A1-1-1), *3 is L a2 is the binding site to R a121 ~R a128 One selected from is a single bond bonded to *8, and R that is not a single bond bonded to *8 a121 ~R a128 is a hydrogen atom. In formula (A1-2-1), *5 is L a2 is the binding site to R a131 ~R a140 One selected from is a single bond bonded to *10, and R is not a single bond bonded to *10 a131 ~R a140 is a hydrogen atom.

[0009] In another aspect, the present invention provides a compound represented by formula (B): [ka] (In formula (B), N * is the central nitrogen atom. Ar b1 and Ar b2 are each independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms. L b1 ~L b3 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 30 ring atoms. R b1 ~R b13 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other. However, the central nitrogen atom N * Adjacent to L b1 ~L b3 , Ar b1 and Ar b2 at least one hydrogen atom selected from the hydrogen atoms of L b3 is an unsubstituted p-phenylene group, and Ar b1 and Ar b2 are both unsubstituted naphthyl groups, and L b1 and L b2 When at least one selected from the above is a biphenylene group, the biphenylene group is represented by the following formula (B1). [ka] (In formula (B1), *7 is the central nitrogen atom N * is the bond position to Ar b1 Or Ar b2 is the binding site to R b21 ~R b25 is a single bond bonded to *8, and R b26 , R b28 and R b30 is a single bond bonded to *9, and R is not a single bond bonded to *8 and *9 b21 ~R b25 , R b26 , R b28 and R b30, and R b27 and R b29 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are either identical or different.

[0010] In yet another aspect, the present invention provides a compound represented by formula (C): [ka] (In formula (C), N * is the central nitrogen atom. Ar c1 represents a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by the following formula (C1). [ka] (In formula (C1), *12 is L c1 is the binding site to R c31 ~R c38 is a single bond bonded to *13, and R is not a single bond bonded to *13. c31 ~R c38 , and R c39 and R c40 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are either identical or different.) L c1 ~L c3 each independently represents a single bond, or a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms. R c1 ~R c13 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other. R c21 ~R c28 One selected from is a single bond bonded to *11, and R that is not a single bond bonded to *11 c21 ~R c28 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other. However, L c3 is the following formula (C2), and L a1 is a single bond, and L a2 is an unsubstituted p-phenylene group, Ar c1 represents a substituted or unsubstituted naphthyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by formula (C1), L c3 is an unsubstituted m-phenylene group, and L c2 is a p-phenylene group, R c21 , R c24 , R c25 , and R c28 one selected from is a single bond bonded to *13, L c3is the following formula (C3), and L a1 and L a2 is an unsubstituted p-phenylene group, Ar c1 represents a substituted or unsubstituted naphthyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by formula (C1), L c3 is the following formula (C3), and L a1 is a single bond, and L a2 is an unsubstituted p-phenylene group, Ar c1 represents a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted terphenyl group, or a group represented by formula (C1) above, L c2 and L c3 is an unsubstituted p-phenylene group, Ar c1 represents a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by the above formula (C1). [ka] (In formula (C2), *14 is the bond position to the ring C, and *16 is the central nitrogen atom N * is the binding site to R c42 and R c44 is a single bond bonded to *15, and R is not a single bond bonded to *15. c42 and R c44 , R c41 , R c43 , and R c45 ~R c49 is a hydrogen atom. In formula (C3), *17 is the bond position to the ring C, and *19 is the central nitrogen atom N * is the binding site to R c56 and R c58 One selected from is a single bond bonded to *18, and R that is not a single bond bonded to *18 c56 and Rc58 , R c51 ~R c55 , R c57 And R c59 is a hydrogen atom.

[0011] In still another aspect, the present invention provides a material for an organic electroluminescence device, comprising a compound represented by formula (A), (B) or (C).

[0012] In still another aspect, the present invention provides an organic electroluminescent device comprising an anode, a cathode, and organic layers disposed between the anode and the cathode, the organic layers comprising an emissive layer, and at least one layer of the organic layers comprising a compound represented by formula (A), (B) or (C).

[0013] In still another aspect, the present invention provides an electronic device including the organic electroluminescence device. Effect of the Invention

[0014] An organic EL device containing a compound represented by formula (A), (B) or (C) exhibits improved device performance. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram illustrating an example of a layer structure of an organic EL element according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing another example of a layer structure of an organic EL element according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a schematic diagram showing still another example of a layer structure of an organic EL element according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] [Definition] In this specification, hydrogen atoms include isotopes having different numbers of neutrons, namely protium, deuterium, and tritium.

[0017] In the present specification, in a chemical structural formula, a hydrogen atom, i.e., a protium atom, a deuterium atom, or a tritium atom is assumed to be bonded to a possible bonding position that is not explicitly indicated with a symbol such as "R" or "D" representing a deuterium atom.

[0018] In this specification, the number of ring carbon atoms represents the number of carbon atoms among the atoms constituting the ring itself of a compound having a structure in which atoms are bonded in a ring (for example, a monocyclic compound, a condensed ring compound, a bridged compound, a carbocyclic compound, and a heterocyclic compound). When the ring is substituted with a substituent, the carbon contained in the substituent is not included in the number of ring carbon atoms. The "number of ring carbon atoms" described below is the same unless otherwise specified. For example, a benzene ring has 6 ring carbon atoms, a naphthalene ring has 10 ring carbon atoms, a pyridine ring has 5 ring carbon atoms, and a furan ring has 4 ring carbon atoms. For example, the number of ring carbon atoms of a 9,9-diphenylfluorenyl group is 13, and the number of ring carbon atoms of a 9,9'-spirobifluorenyl group is 25. In addition, when a benzene ring is substituted with, for example, an alkyl group as a substituent, the carbon number of the alkyl group is not included in the number of ring carbon atoms of the benzene ring. Therefore, the number of ring carbon atoms of the benzene ring substituted with an alkyl group is 6. In addition, when a naphthalene ring is substituted with, for example, an alkyl group as a substituent, the carbon number of the alkyl group is not included in the number of ring carbon atoms of the naphthalene ring. Therefore, the number of ring carbon atoms of the naphthalene ring substituted with an alkyl group is 10.

[0019] In this specification, the number of ring atoms refers to the number of atoms constituting the ring itself of a compound (e.g., a monocyclic compound, a fused ring compound, a bridged compound, a carbocyclic compound, and a heterocyclic compound) having a structure in which atoms are bonded in a ring (e.g., a monocyclic compound, a fused ring compound, and a ring assembly). The number of ring atoms does not include atoms that do not constitute a ring (e.g., a hydrogen atom that terminates the bond of an atom constituting a ring) or atoms contained in a substituent when the ring is substituted with a substituent. The "number of ring atoms" described below is the same unless otherwise specified. For example, the number of ring atoms of a pyridine ring is 6, the number of ring atoms of a quinazoline ring is 10, and the number of ring atoms of a furan ring is 5. For example, the number of hydrogen atoms or atoms constituting a substituent bonded to a pyridine ring is not included in the number of pyridine ring atoms. Therefore, the number of ring atoms of a pyridine ring to which a hydrogen atom or a substituent is bonded is 6. For example, hydrogen atoms bonded to carbon atoms of a quinazoline ring or atoms constituting a substituent are not included in the number of ring atoms of the quinazoline ring. Therefore, the number of ring atoms of a quinazoline ring to which a hydrogen atom or a substituent is bonded is 10.

[0020] In the present specification, the "number of carbon atoms XX to YY" in the expression "a substituted or unsubstituted ZZ group having carbon atoms XX to YY" represents the number of carbon atoms when the ZZ group is unsubstituted, and does not include the number of carbon atoms of the substituent when the ZZ group is substituted. Here, "YY" is larger than "XX", "XX" means an integer of 1 or more, and "YY" means an integer of 2 or more.

[0021] In the present specification, the "number of atoms XX to YY" in the expression "a substituted or unsubstituted ZZ group having the number of atoms XX to YY" represents the number of atoms when the ZZ group is unsubstituted, and does not include the number of atoms of the substituent when the ZZ group is substituted. Here, "YY" is larger than "XX", "XX" means an integer of 1 or more, and "YY" means an integer of 2 or more.

[0022] In this specification, the term "unsubstituted ZZ group" refers to the case where a "substituted or unsubstituted ZZ group" is an "unsubstituted ZZ group", and the term "substituted ZZ group" refers to the case where a "substituted or unsubstituted ZZ group" is a "substituted ZZ group". In the present specification, "unsubstituted" in the case of "a substituted or unsubstituted ZZ group" means that a hydrogen atom in the ZZ group is not replaced with a substituent. The hydrogen atom in the "unsubstituted ZZ group" is a protium atom, a deuterium atom, or a tritium atom. In the present specification, "substituted" in the case of "a substituted or unsubstituted ZZ group" means that one or more hydrogen atoms in the ZZ group are replaced with a substituent. Similarly, "substituted" in the case of "a BB group substituted with an AA group" means that one or more hydrogen atoms in the BB group are replaced with an AA group.

[0023] "Substituents Described Herein" The substituents described in this specification will be described below.

[0024] The "unsubstituted aryl group" described in this specification has 6 to 50 ring carbon atoms, preferably 6 to 30, and more preferably 6 to 18 ring carbon atoms, unless otherwise specified in this specification. The "unsubstituted heterocyclic group" described in this specification has 5 to 50 ring atoms, preferably 5 to 30, and more preferably 5 to 18 ring atoms, unless otherwise specified in this specification. The "unsubstituted alkyl group" described in this specification has 1 to 50 carbon atoms, preferably 1 to 20 carbon atoms, and more preferably 1 to 6 carbon atoms, unless otherwise specified in this specification. The "unsubstituted alkenyl group" described in this specification has 2 to 50 carbon atoms, preferably 2 to 20 carbon atoms, and more preferably 2 to 6 carbon atoms, unless otherwise specified in this specification. The "unsubstituted alkynyl group" described in this specification has 2 to 50 carbon atoms, preferably 2 to 20 carbon atoms, and more preferably 2 to 6 carbon atoms, unless otherwise specified in this specification. The "unsubstituted cycloalkyl group" described in this specification has 3 to 50 ring carbon atoms, preferably 3 to 20, and more preferably 3 to 6 ring carbon atoms, unless otherwise specified in this specification. The "unsubstituted arylene group" described in this specification has 6 to 50 ring carbon atoms, preferably 6 to 30, and more preferably 6 to 18 ring carbon atoms, unless otherwise specified in this specification. The "unsubstituted divalent heterocyclic group" described in this specification has 5 to 50 ring atoms, preferably 5 to 30, and more preferably 5 to 18 ring atoms, unless otherwise specified in this specification. The "unsubstituted alkylene group" described in this specification has 1 to 50 carbon atoms, preferably 1 to 20 carbon atoms, and more preferably 1 to 6 carbon atoms, unless otherwise specified in this specification.

[0025] "Substituted or unsubstituted aryl groups" Specific examples (specific example group G1) of the "substituted or unsubstituted aryl group" described in this specification include the following unsubstituted aryl group (specific example group G1A) and substituted aryl group (specific example group G1B). (Here, the unsubstituted aryl group refers to the case where the "substituted or unsubstituted aryl group" is an "unsubstituted aryl group", and the substituted aryl group refers to the case where the "substituted or unsubstituted aryl group" is a "substituted aryl group".) In this specification, when the term "aryl group" is simply used, it includes both an "unsubstituted aryl group" and a "substituted aryl group". The term "substituted aryl group" refers to a group in which one or more hydrogen atoms of an "unsubstituted aryl group" are replaced with a substituent. Examples of the "substituted aryl group" include the "unsubstituted aryl group" in the specific example group G1A below in which one or more hydrogen atoms are replaced with a substituent, and the substituted aryl group in the specific example group G1B below. The examples of the "unsubstituted aryl group" and the examples of the "substituted aryl group" listed here are merely examples, and the "substituted aryl group" described in this specification also includes the "substituted aryl group" in the specific example group G1B below in which a hydrogen atom bonded to a carbon atom of the aryl group itself is further replaced with a substituent, and the "substituted aryl group" in the specific example group G1B below in which a hydrogen atom of a substituent is further replaced with a substituent.

[0026] Unsubstituted aryl groups (specific example group G1A): Phenyl group, p-biphenyl group, m-biphenyl group, o-biphenyl group, p-terphenyl-4-yl group, p-terphenyl-3-yl group, p-terphenyl-2-yl group, m-terphenyl-4-yl group, m-terphenyl-3-yl group, m-terphenyl-2-yl group, o-terphenyl-4-yl group, o-terphenyl-3-yl group, o-terphenyl-2-yl group, 1-naphthyl group, 2-naphthyl group, anthryl group, Benzanthryl group, A phenanthryl group, Benzophenanthryl group, A phenalenyl group, Pyrenyl group, Chrysenyl group, benzochrysenyl group, A triphenylenyl group, Benzotriphenylenyl group, tetracenyl group, Pentacenyl group, fluorenyl group, 9,9'-spirobifluorenyl group, Benzofluorenyl group, Dibenzofluorenyl group, fluoranthenyl group, Benzofluoranthenyl group, Perylenyl groups, and A monovalent aryl group derived by removing one hydrogen atom from a ring structure represented by the following general formulas (TEMP-1) to (TEMP-15).

[0027] [ka]

[0028] [ka]

[0029] Substituted aryl groups (specific example group G1B): o-tolyl group, m-tolyl group, p-tolyl group, para-xylyl group, meta-xylyl group, ortho-xylyl group, para-isopropylphenyl group, meta-isopropylphenyl group, ortho-isopropylphenyl group, para-t-butylphenyl group, meta-t-butylphenyl group, ortho-t-butylphenyl group, 3,4,5-trimethylphenyl group, 9,9-dimethylfluorenyl group, 9,9-diphenylfluorenyl group 9,9-bis(4-methylphenyl)fluorenyl group, 9,9-bis(4-isopropylphenyl)fluorenyl group, 9,9-bis(4-t-butylphenyl)fluorenyl group, Cyanophenyl group, triphenylsilylphenyl group, trimethylsilylphenyl group, phenylnaphthyl group, naphthylphenyl group, and A group in which one or more hydrogen atoms of a monovalent group derived from a ring structure represented by any one of the general formulae (TEMP-1) to (TEMP-15) are replaced with a substituent.

[0030] "Substituted or unsubstituted heterocyclic groups" The "heterocyclic group" described herein is a cyclic group containing at least one heteroatom as a ring-forming atom. Specific examples of the heteroatom include a nitrogen atom, an oxygen atom, a sulfur atom, a silicon atom, a phosphorus atom, and a boron atom. The "heterocyclic groups" described herein are either monocyclic or fused ring groups. The "heterocyclic group" described herein may be an aromatic heterocyclic group or a non-aromatic heterocyclic group. Specific examples (specific example group G2) of the "substituted or unsubstituted heterocyclic group" described in this specification include the following unsubstituted heterocyclic group (specific example group G2A) and substituted heterocyclic group (specific example group G2B). (Here, the unsubstituted heterocyclic group refers to the case where the "substituted or unsubstituted heterocyclic group" is an "unsubstituted heterocyclic group", and the substituted heterocyclic group refers to the case where the "substituted or unsubstituted heterocyclic group" is a "substituted heterocyclic group".) In this specification, when the term "heterocyclic group" is simply used, it includes both an "unsubstituted heterocyclic group" and a "substituted heterocyclic group". The term "substituted heterocyclic group" refers to a group in which one or more hydrogen atoms of an "unsubstituted heterocyclic group" are replaced with a substituent. Specific examples of the "substituted heterocyclic group" include the groups in which the hydrogen atoms of the "unsubstituted heterocyclic group" in the specific example group G2A below are replaced, and the examples of the substituted heterocyclic group in the specific example group G2B below are exemplified. The examples of the "unsubstituted heterocyclic group" and the examples of the "substituted heterocyclic group" listed here are merely examples, and the "substituted heterocyclic group" described in this specification also includes the groups in which the hydrogen atoms bonded to the ring-forming atoms of the heterocyclic group itself in the "substituted heterocyclic group" in the specific example group G2B are further replaced with a substituent, and the groups in which the hydrogen atoms of the substituents in the "substituted heterocyclic group" in the specific example group G2B are further replaced with a substituent.

[0031] The specific example group G2A includes, for example, the following unsubstituted heterocyclic groups containing a nitrogen atom (specific example group G2A1), unsubstituted heterocyclic groups containing an oxygen atom (specific example group G2A2), unsubstituted heterocyclic groups containing a sulfur atom (specific example group G2A3), and monovalent heterocyclic groups derived by removing one hydrogen atom from ring structures represented by the following general formulae (TEMP-16) to (TEMP-33) (specific example group G2A4).

[0032] Specific example group G2B includes, for example, the following nitrogen atom-containing substituted heterocyclic groups (specific example group G2B1), oxygen atom-containing substituted heterocyclic groups (specific example group G2B2), sulfur atom-containing substituted heterocyclic groups (specific example group G2B3), and monovalent heterocyclic groups derived from ring structures represented by the following general formulae (TEMP-16) to (TEMP-33), in which one or more hydrogen atoms are replaced with substituents (specific example group G2B4).

[0033] Unsubstituted heterocyclic groups containing a nitrogen atom (specific example group G2A1): Pyrrolyl group, imidazolyl group, A pyrazolyl group, A triazolyl group, Tetrazolyl group, oxazolyl group, an isoxazolyl group, oxadiazolyl group, A thiazolyl group, isothiazolyl group, A thiadiazolyl group, Pyridyl group, pyridazinyl group, pyrimidinyl group, A pyrazinyl group, Triazinyl group, Indolyl groups, isoindolyl group, Indolizinyl group, A quinolizinyl group, A quinolyl group, isoquinolyl group, Cinnolyl group, phthalazinyl group, A quinazolinyl group, A quinoxalinyl group, Benzimidazolyl group, Indazolyl group, A phenanthrolinyl group, A phenanthridinyl group, acridinyl group, A phenazinyl group, A carbazolyl group, Benzocarbazolyl group, morpholino group, phenoxazinyl group, A phenothiazinyl group, Azacarbazolyl and diazacarbazolyl groups.

[0034] Unsubstituted heterocyclic groups containing an oxygen atom (specific example group G2A2): Furyl group, oxazolyl group, an isoxazolyl group, oxadiazolyl group, xanthenyl group, benzofuranyl group, isobenzofuranyl group, Dibenzofuranyl group, naphthobenzofuranyl group, benzoxazolyl group, benzoisoxazolyl group, phenoxazinyl group, morpholino group, Dinaphthofuranyl group, azadibenzofuranyl group, diazadibenzofuranyl group, Azanaphthobenzofuranyl groups, and Diazanaphthobenzofuranyl group.

[0035] Unsubstituted heterocyclic groups containing a sulfur atom (specific example group G2A3): A thienyl group, A thiazolyl group, isothiazolyl group, A thiadiazolyl group, Benzothiophenyl group (benzothienyl group), Isobenzothiophenyl group (isobenzothienyl group), Dibenzothiophenyl group (dibenzothienyl group), Naphthobenzothiophenyl group (naphthobenzothienyl group), benzothiazolyl group, Benzisothiazolyl group, A phenothiazinyl group, Dinaphthothiophenyl group (dinaphthothienyl group), Azadibenzothiophenyl group (azadibenzothienyl group), Diazadibenzothiophenyl group (diazadibenzothienyl group), Azanapthobenzothiophenyl group (azanaphthobenzothienyl group), and Diazanaphthobenzothiophenyl group (diazanaphthobenzothienyl group).

[0036] Monovalent heterocyclic groups derived by removing one hydrogen atom from the ring structures represented by the following general formulae (TEMP-16) to (TEMP-33) (specific example group G2A4):

[0037] [ka]

[0038] [ka]

[0039] In the general formulae (TEMP-16) to (TEMP-33), X A and Y A are each independently an oxygen atom, a sulfur atom, NH, or CH2. A and Y A At least one of is an oxygen atom, a sulfur atom, or NH. In the general formulae (TEMP-16) to (TEMP-33), X A and Y A When at least one of is NH or CH2, the monovalent heterocyclic group derived from the ring structure represented by the general formulas (TEMP-16) to (TEMP-33) includes a monovalent group obtained by removing one hydrogen atom from NH or CH2.

[0040] Substituted heterocyclic groups containing a nitrogen atom (specific example group G2B1): A (9-phenyl)carbazolyl group, (9-biphenylyl)carbazolyl group, (9-phenyl)phenylcarbazolyl group, (9-naphthyl)carbazolyl group, diphenylcarbazol-9-yl group, phenylcarbazol-9-yl group, methylbenzimidazolyl group, Ethyl benzimidazolyl group, phenyltriazinyl group, Biphenylyltriazinyl group, Diphenyltriazinyl group, phenylquinazolinyl group, and Biphenylylquinazolinyl group.

[0041] Substituted heterocyclic groups containing an oxygen atom (specific example group G2B2): phenyldibenzofuranyl group, methyldibenzofuranyl group, t-butyldibenzofuranyl group, and A monovalent residue of spiro[9H-xanthene-9,9'-[9H]fluorene].

[0042] Substituted heterocyclic groups containing sulfur atoms (specific example group G2B3): Phenyldibenzothiophenyl group, methyldibenzothiophenyl group, t-Butyldibenzothiophenyl group, and A monovalent residue of spiro[9H-thioxanthene-9,9'-[9H]fluorene].

[0043] Groups in which one or more hydrogen atoms of a monovalent heterocyclic group derived from a ring structure represented by the above general formulae (TEMP-16) to (TEMP-33) are replaced with a substituent (specific example group G2B4):

[0044] The above "one or more hydrogen atoms of a monovalent heterocyclic group" means one or more hydrogen atoms selected from a hydrogen atom bonded to a ring-forming carbon atom of the monovalent heterocyclic group, a hydrogen atom bonded to a nitrogen atom when at least one of XA and YA is NH, and a hydrogen atom of a methylene group when one of XA and YA is CH2.

[0045] "Substituted or unsubstituted alkyl groups" Specific examples (specific example group G3) of the "substituted or unsubstituted alkyl group" described in this specification include the following unsubstituted alkyl group (specific example group G3A) and substituted alkyl group (specific example group G3B). (Here, the unsubstituted alkyl group refers to the case where the "substituted or unsubstituted alkyl group" is an "unsubstituted alkyl group", and the substituted alkyl group refers to the case where the "substituted or unsubstituted alkyl group" is a "substituted alkyl group".) Hereinafter, when the term "alkyl group" is simply mentioned, it includes both the "unsubstituted alkyl group" and the "substituted alkyl group". The term "substituted alkyl group" refers to a group in which one or more hydrogen atoms in the "unsubstituted alkyl group" are replaced with a substituent. Specific examples of the "substituted alkyl group" include the following "unsubstituted alkyl group" (specific example group G3A) in which one or more hydrogen atoms are replaced with a substituent, and examples of the substituted alkyl group (specific example group G3B). In this specification, the alkyl group in the "unsubstituted alkyl group" refers to a chain-like alkyl group. Therefore, the "unsubstituted alkyl group" includes a straight-chain "unsubstituted alkyl group" and a branched "unsubstituted alkyl group". Note that the examples of the "unsubstituted alkyl group" and the examples of the "substituted alkyl group" listed here are merely examples, and the "substituted alkyl group" described in this specification also includes a group in which a hydrogen atom of the alkyl group itself in the "substituted alkyl group" in the specific example group G3B is further replaced with a substituent, and a group in which a hydrogen atom of a substituent in the "substituted alkyl group" in the specific example group G3B is further replaced with a substituent.

[0046] Unsubstituted alkyl groups (specific example group G3A): Methyl group, Ethyl group, n-propyl group, isopropyl group, n-Butyl group, isobutyl group, s-Butyl group, and t-Butyl group.

[0047] Substituted alkyl groups (specific example group G3B): Heptafluoropropyl group (including isomers), pentafluoroethyl group, 2,2,2-trifluoroethyl group, and Trifluoromethyl group.

[0048] "Substituted or unsubstituted alkenyl group" Specific examples (specific example group G4) of the "substituted or unsubstituted alkenyl group" described in this specification include the following unsubstituted alkenyl group (specific example group G4A) and substituted alkenyl group (specific example group G4B). (Here, the unsubstituted alkenyl group refers to the case where the "substituted or unsubstituted alkenyl group" is an "unsubstituted alkenyl group", and the "substituted alkenyl group" refers to the case where the "substituted or unsubstituted alkenyl group" is a "substituted alkenyl group".) In this specification, the term "alkenyl group" simply includes both an "unsubstituted alkenyl group" and a "substituted alkenyl group". The term "substituted alkenyl group" refers to a group in which one or more hydrogen atoms in an "unsubstituted alkenyl group" are replaced with a substituent. Specific examples of the "substituted alkenyl group" include the following "unsubstituted alkenyl group" (specific example group G4A) having a substituent, and examples of substituted alkenyl groups (specific example group G4B). The examples of the "unsubstituted alkenyl group" and the examples of the "substituted alkenyl group" listed here are merely examples, and the "substituted alkenyl group" described in this specification also includes a group in which a hydrogen atom of the alkenyl group itself in the "substituted alkenyl group" in specific example group G4B is further replaced with a substituent, and a group in which a hydrogen atom of a substituent in the "substituted alkenyl group" in specific example group G4B is further replaced with a substituent.

[0049] Unsubstituted alkenyl groups (specific example group G4A): Vinyl group, Allyl groups, 1-butenyl group, 2-butenyl group, and 3-Butenyl group.

[0050] Substituted alkenyl groups (specific example group G4B): 1,3-butanedienyl group, 1-methylvinyl group, 1-methylallyl group, 1,1-dimethylallyl group, 2-methylallyl group, and 1,2-Dimethylallyl group.

[0051] "Substituted or unsubstituted alkynyl groups" Specific examples (specific example group G5) of the "substituted or unsubstituted alkynyl group" described in this specification include the following unsubstituted alkynyl groups (specific example group G5A). (Here, the unsubstituted alkynyl group refers to the case where the "substituted or unsubstituted alkynyl group" is an "unsubstituted alkynyl group".) Hereinafter, when simply referring to an "alkynyl group", it includes both an "unsubstituted alkynyl group" and a "substituted alkynyl group". The term "substituted alkynyl group" refers to an "unsubstituted alkynyl group" in which one or more hydrogen atoms have been replaced with a substituent. Specific examples of the "substituted alkynyl group" include the following "unsubstituted alkynyl groups" (specific example group G5A) in which one or more hydrogen atoms have been replaced with a substituent.

[0052] Unsubstituted alkynyl groups (specific example group G5A): Ethynyl group

[0053] "Substituted or unsubstituted cycloalkyl groups" Specific examples (specific example group G6) of the "substituted or unsubstituted cycloalkyl group" described in this specification include the following unsubstituted cycloalkyl group (specific example group G6A) and substituted cycloalkyl group (specific example group G6B). (Here, the unsubstituted cycloalkyl group refers to the case where the "substituted or unsubstituted cycloalkyl group" is an "unsubstituted cycloalkyl group", and the substituted cycloalkyl group refers to the case where the "substituted or unsubstituted cycloalkyl group" is a "substituted cycloalkyl group".) In this specification, when the term "cycloalkyl group" is simply used, it includes both an "unsubstituted cycloalkyl group" and a "substituted cycloalkyl group". The term "substituted cycloalkyl group" refers to a group in which one or more hydrogen atoms in the "unsubstituted cycloalkyl group" are replaced with a substituent. Specific examples of the "substituted cycloalkyl group" include the following "unsubstituted cycloalkyl group" (specific example group G6A) in which one or more hydrogen atoms are replaced with a substituent, and the examples of the substituted cycloalkyl group (specific example group G6B). The examples of the "unsubstituted cycloalkyl group" and the examples of the "substituted cycloalkyl group" listed here are merely examples, and the "substituted cycloalkyl group" described in this specification also includes a group in the "substituted cycloalkyl group" in the specific example group G6B in which one or more hydrogen atoms bonded to a carbon atom of the cycloalkyl group itself are replaced with a substituent, and a group in the "substituted cycloalkyl group" in the specific example group G6B in which a hydrogen atom of a substituent is further replaced with a substituent.

[0054] Unsubstituted cycloalkyl groups (specific example group G6A): A cyclopropyl group, A cyclobutyl group, Cyclopentyl group, cyclohexyl group, 1-adamantyl group, 2-adamantyl group, 1-norbornyl group, and 2-Norbornyl group.

[0055] Substituted cycloalkyl groups (specific example group G6B): 4-Methylcyclohexyl group.

[0056] -Si(R 901 )(R 902 )(R 903 ) a group represented by As described herein, -Si(R 901 )(R 902 )(R 903 Specific examples (specific example group G7) of the group represented by -Si(G1)(G1)(G1), -Si(G1)(G2)(G2), -Si(G1)(G1)(G2), -Si(G2)(G2)(G2), -Si(G3)(G3)(G3), and -Si(G6)(G6)(G6) Here, G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. G2 is a "substituted or unsubstituted heterocyclic group" described in specific example group G2. G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6. The multiple G1s in -Si(G1)(G1)(G1) are the same as or different from each other. The multiple G2s in -Si(G1)(G2)(G2) are the same as or different from each other. The multiple G1s in -Si(G1)(G1)(G2) are the same as or different from each other. The multiple G2s in -Si(G2)(G2)(G2) are the same as or different from each other. The multiple G3s in -Si(G3)(G3)(G3) are the same as or different from each other. The multiple G6s in -Si(G6)(G6)(G6) are the same as or different from each other.

[0057] -O-(R 904 ) a group represented by As described herein, -O-(R 904 Specific examples (specific example group G8) of the group represented by -O(G1), -O(G2), -O(G3), and -O(G6) Examples include: Where: G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. G2 is a "substituted or unsubstituted heterocyclic group" described in specific example group G2. G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6.

[0058] -S-(R 905 ) a group represented by As described herein, -S-(R 905 Specific examples (specific example group G9) of the group represented by -S(G1), -S(G2), -S(G3), and -S(G6) Examples include: Where: G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. G2 is a "substituted or unsubstituted heterocyclic group" described in specific example group G2. G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6.

[0059] -N(R 906 )(R 907 ) a group represented by As described herein, -N(R 906 )(R 907 Specific examples (specific example group G10) of the group represented by -N(G1)(G1), -N(G2)(G2), -N(G1)(G2), -N(G3)(G3), and -N(G6)(G6) Examples include: Where: G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. G2 is a "substituted or unsubstituted heterocyclic group" described in specific example group G2. G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3. G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6. -The multiple G1's in N(G1)(G1) are the same or different from each other. -The multiple G2's in N(G2)(G2) are the same or different from each other. -The multiple G3's in N(G3)(G3) are the same or different from each other. The multiple G6s in -N(G6)(G6) are the same or different from each other.

[0060] "Halogen atoms" Specific examples of the "halogen atom" described in this specification (specific example group G11) include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

[0061] "Substituted or unsubstituted fluoroalkyl groups" The term "substituted or unsubstituted fluoroalkyl group" as used herein means a group in which at least one hydrogen atom bonded to a carbon atom constituting the alkyl group in the "substituted or unsubstituted alkyl group" is replaced with a fluorine atom, and also includes a group (perfluoro group) in which all hydrogen atoms bonded to carbon atoms constituting the alkyl group in the "substituted or unsubstituted alkyl group" are replaced with fluorine atoms. The number of carbon atoms in the "unsubstituted fluoroalkyl group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified in the present specification. The term "substituted fluoroalkyl group" means a group in which one or more hydrogen atoms in the "fluoroalkyl group" are replaced with a substituent. The term "substituted fluoroalkyl group" as used herein also includes a group in which one or more hydrogen atoms bonded to a carbon atom in the alkyl chain in the "substituted fluoroalkyl group" are further replaced with a substituent, and a group in which one or more hydrogen atoms in the substituent in the "substituted fluoroalkyl group" are further replaced with a substituent. Specific examples of the "unsubstituted fluoroalkyl group" include the examples of the group in which one or more hydrogen atoms in the "alkyl group" (specific example group G3) are replaced with a fluorine atom.

[0062] "Substituted or unsubstituted haloalkyl groups" The term "substituted or unsubstituted haloalkyl group" as used herein means a group in which at least one hydrogen atom bonded to a carbon atom constituting the alkyl group in the "substituted or unsubstituted alkyl group" is replaced with a halogen atom, and also includes a group in which all hydrogen atoms bonded to carbon atoms constituting the alkyl group in the "substituted or unsubstituted alkyl group" are replaced with halogen atoms. The number of carbon atoms in the "unsubstituted haloalkyl group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified in the present specification. The term "substituted haloalkyl group" means a group in which one or more hydrogen atoms in the "haloalkyl group" are replaced with a substituent. The term "substituted haloalkyl group" as used herein also includes a group in which one or more hydrogen atoms bonded to a carbon atom in the alkyl chain in the "substituted haloalkyl group" are further replaced with a substituent, and a group in which one or more hydrogen atoms in the substituent in the "substituted haloalkyl group" are further replaced with a substituent. Specific examples of the "unsubstituted haloalkyl group" include the examples of the group in which one or more hydrogen atoms in the "alkyl group" (specific example group G3) are replaced with a halogen atom. Haloalkyl groups are sometimes referred to as halogenated alkyl groups.

[0063] "Substituted or unsubstituted alkoxy groups" A specific example of the "substituted or unsubstituted alkoxy group" described in this specification is a group represented by -O(G3), where G3 is the "substituted or unsubstituted alkyl group" described in specific example group G3. The number of carbon atoms in the "unsubstituted alkoxy group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified in this specification.

[0064] "Substituted or unsubstituted alkylthio groups" A specific example of the "substituted or unsubstituted alkylthio group" described in this specification is a group represented by -S(G3), where G3 is the "substituted or unsubstituted alkyl group" described in specific example group G3. The number of carbon atoms in the "unsubstituted alkylthio group" is 1 to 50, preferably 1 to 30, and more preferably 1 to 18, unless otherwise specified in this specification.

[0065] "Substituted or unsubstituted aryloxy group" A specific example of the "substituted or unsubstituted aryloxy group" described in this specification is a group represented by -O(G1), where G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. The number of ring carbon atoms of the "unsubstituted aryloxy group" is 6 to 50, preferably 6 to 30, and more preferably 6 to 18, unless otherwise specified in this specification.

[0066] "Substituted or unsubstituted arylthio group" A specific example of the "substituted or unsubstituted arylthio group" described in this specification is a group represented by -S(G1), where G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. The number of ring carbon atoms of the "unsubstituted arylthio group" is 6 to 50, preferably 6 to 30, and more preferably 6 to 18, unless otherwise specified in this specification.

[0067] "Substituted or unsubstituted trialkylsilyl group" A specific example of the "trialkylsilyl group" described in this specification is a group represented by -Si(G3)(G3)(G3), where G3 is a "substituted or unsubstituted alkyl group" described in the specific example group G3. The multiple G3s in -Si(G3)(G3)(G3) are the same or different from each other. The number of carbon atoms in each alkyl group of the "trialkylsilyl group" is 1 to 50, preferably 1 to 20, and more preferably 1 to 6, unless otherwise specified in this specification.

[0068] "Substituted or unsubstituted aralkyl group" A specific example of the "substituted or unsubstituted aralkyl group" described in the present specification is a group represented by -(G3)-(G1), where G3 is a "substituted or unsubstituted alkyl group" described in the specific example group G3, and G1 is a "substituted or unsubstituted aryl group" described in the specific example group G1. Thus, the "aralkyl group" is a group in which a hydrogen atom of an "alkyl group" is replaced with an "aryl group" as a substituent, and is one aspect of a "substituted alkyl group". The "unsubstituted aralkyl group" is an "unsubstituted alkyl group" substituted with an "unsubstituted aryl group", and the carbon number of the "unsubstituted aralkyl group" is 7 to 50, preferably 7 to 30, and more preferably 7 to 18, unless otherwise specified in the present specification. Specific examples of "substituted or unsubstituted aralkyl groups" include benzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, 2-phenylisopropyl, phenyl-t-butyl, α-naphthylmethyl, 1-α-naphthylethyl, 2-α-naphthylethyl, 1-α-naphthylisopropyl, 2-α-naphthylisopropyl, β-naphthylmethyl, 1-β-naphthylethyl, 2-β-naphthylethyl, 1-β-naphthylisopropyl, and 2-β-naphthylisopropyl.

[0069] Unless otherwise specified in the present specification, the substituted or unsubstituted aryl group described in the present specification is preferably a phenyl group, a p-biphenyl group, a m-biphenyl group, an o-biphenyl group, a p-terphenyl-4-yl group, a p-terphenyl-3-yl group, a p-terphenyl-2-yl group, a m-terphenyl-4-yl group, a m-terphenyl-3-yl group, a m-terphenyl-2-yl group, an o-terphenyl-4-yl group, an o-terphenyl-3-yl group, an o-terphenyl-2-yl group, a 1-naphthyl group, a 2-naphthyl group, an anthryl group, a phenanthryl group, a pyrenyl group, a chrysenyl group, a triphenylenyl group, a fluorenyl group, a 9,9'-spirobifluorenyl group, a 9,9-dimethylfluorenyl group, a 9,9-diphenylfluorenyl group, and the like.

[0070] The substituted or unsubstituted heterocyclic group described in the present specification, unless otherwise specified in the present specification, is preferably a pyridyl group, a pyrimidinyl group, a triazinyl group, a quinolyl group, an isoquinolyl group, a quinazolinyl group, a benzimidazolyl group, a phenanthrolinyl group, a carbazolyl group (a 1-carbazolyl group, a 2-carbazolyl group, a 3-carbazolyl group, a 4-carbazolyl group, or a 9-carbazolyl group), a benzocarbazolyl group, an azacarbazolyl group, a diazacarbazolyl group, a dibenzofuranyl group, a naphthobenzofuranyl group, an azadibenzofuranyl group, a diazadibenzofuranyl group, a dibenzothiophenyl group, a naphthobenzothiophenyl group, an aza Examples of such groups include a dibenzothiophenyl group, a diazadibenzothiophenyl group, a (9-phenyl)carbazolyl group (a (9-phenyl)carbazol-1-yl group, a (9-phenyl)carbazol-2-yl group, a (9-phenyl)carbazol-3-yl group, or a (9-phenyl)carbazol-4-yl group), a (9-biphenylyl)carbazolyl group, a (9-phenyl)phenylcarbazolyl group, a diphenylcarbazol-9-yl group, a phenylcarbazol-9-yl group, a phenyltriazinyl group, a biphenylyltriazinyl group, a diphenyltriazinyl group, a phenyldibenzofuranyl group, and a phenyldibenzothiophenyl group.

[0071] In this specification, a carbazolyl group is specifically any of the following groups, unless otherwise specified in the specification.

[0072] [ka]

[0073] In this specification, the (9-phenyl)carbazolyl group is specifically any of the following groups, unless otherwise specified in the specification.

[0074] [ka]

[0075] In the general formulae (TEMP-Cz1) to (TEMP-Cz9), * represents a bonding position.

[0076] In this specification, a dibenzofuranyl group and a dibenzothiophenyl group are specifically any of the following groups, unless otherwise specified in this specification.

[0077] [ka]

[0078] In the above general formulae (TEMP-34) to (TEMP-41), * represents a bonding position.

[0079] The substituted or unsubstituted alkyl groups described herein are preferably methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, t-butyl, and the like, unless otherwise specified herein.

[0080] "Substituted or unsubstituted arylene group" Unless otherwise specified, the "substituted or unsubstituted arylene group" described in this specification is a divalent group derived by removing one hydrogen atom on the aryl ring from the above-mentioned "substituted or unsubstituted aryl group". Specific examples of the "substituted or unsubstituted arylene group" (specific example group G12) include divalent groups derived by removing one hydrogen atom on the aryl ring from the "substituted or unsubstituted aryl group" described in specific example group G1.

[0081] "Substituted or unsubstituted divalent heterocyclic group" Unless otherwise specified, the "substituted or unsubstituted divalent heterocyclic group" described in this specification is a divalent group derived by removing one hydrogen atom on the heterocycle from the above-mentioned "substituted or unsubstituted heterocyclic group". Specific examples of the "substituted or unsubstituted divalent heterocyclic group" (specific example group G13) include divalent groups derived by removing one hydrogen atom on the heterocycle from the "substituted or unsubstituted heterocyclic group" described in specific example group G2.

[0082] "Substituted or unsubstituted alkylene group" Unless otherwise specified, the "substituted or unsubstituted alkylene group" described in this specification is a divalent group derived by removing one hydrogen atom on the alkyl chain from the above-mentioned "substituted or unsubstituted alkyl group". Specific examples of the "substituted or unsubstituted alkylene group" (specific example group G14) include divalent groups derived by removing one hydrogen atom on the alkyl chain from the "substituted or unsubstituted alkyl group" described in specific example group G3.

[0083] The substituted or unsubstituted arylene group described in this specification is preferably any of the groups represented by the following general formulae (TEMP-42) to (TEMP-68), unless otherwise specified in this specification.

[0084] [ka]

[0085] [ka]

[0086] In the general formulae (TEMP-42) to (TEMP-52), Q1 to Q 10 are each independently a hydrogen atom or a substituent. In the above general formulae (TEMP-42) to (TEMP-52), * represents a bonding position.

[0087] [ka]

[0088] In the general formulae (TEMP-53) to (TEMP-62), Q1 to Q 10 are each independently a hydrogen atom or a substituent. Equations Q9 and Q 10 may be bonded to each other via a single bond to form a ring. In the above general formulae (TEMP-53) to (TEMP-62), * represents a bonding position.

[0089] [ka]

[0090] In the general formulae (TEMP-63) to (TEMP-68), Q1 to Q8 each independently represent a hydrogen atom or a substituent. In the above general formulae (TEMP-63) to (TEMP-68), * represents a bonding position.

[0091] The substituted or unsubstituted divalent heterocyclic group described in this specification is preferably any of the groups represented by the following general formulae (TEMP-69) to (TEMP-102), unless otherwise specified in this specification.

[0092] [ka]

[0093] [ka]

[0094] [ka]

[0095] In the general formulae (TEMP-69) to (TEMP-82), Q1 to Q9 each independently represent a hydrogen atom or a substituent.

[0096] [ka]

[0097] [ka]

[0098] [ka]

[0099] [ka]

[0100] In the general formulae (TEMP-83) to (TEMP-102), Q1 to Q8 each independently represent a hydrogen atom or a substituent.

[0101] The above is an explanation of "the substituents described in this specification".

[0102] - "When bonded to form a ring" In this specification, the phrase "one or more of a set consisting of two or more adjacent groups bond to each other to form a substituted or unsubstituted monocycle, bond to each other to form a substituted or unsubstituted fused ring, or are not bonded to each other" means the case where "one or more of a set consisting of two or more adjacent groups bond to each other to form a substituted or unsubstituted monocycle", the case where "one or more of a set consisting of two or more adjacent groups bond to each other to form a substituted or unsubstituted fused ring", and the case where "one or more of a set consisting of two or more adjacent groups are not bonded to each other". In this specification, the cases where "one or more of a set of two or more adjacent rings are bonded to each other to form a substituted or unsubstituted monocyclic ring" and "one or more of a set of two or more adjacent rings are bonded to each other to form a substituted or unsubstituted condensed ring" (hereinafter, these cases may be collectively referred to as "a case where they are bonded to form a ring") will be explained below. The case of an anthracene compound represented by the following general formula (TEMP-103), in which the mother skeleton is an anthracene ring, will be explained as an example.

[0103] [ka]

[0104] For example, R921 ~R 930 In the case where "one or more pairs of adjacent two or more groups are bonded to each other to form a ring," one pair of adjacent two groups is R 921 and R 922 With R 922 and R 923 With R 923 and R 924 With R 924 and R 930 With R 930 and R 925 With R 925 and R 926 With R 926 and R 927 With R 927 and R 928 With R 928 and R 929 and R 929 and R 921 It is paired with .

[0105] The above "one or more pairs" means that two or more pairs of adjacent two or more groups may simultaneously form a ring. For example, R 921 and R 922 and are bonded to ring Q A At the same time, R 925 and R 926 and are bonded to ring Q B When the above general formula (TEMP-103) is formed, the anthracene compound represented by the general formula (TEMP-104) is represented by the following general formula (TEMP-104).

[0106] [ka]

[0107] The case where a "set of two or more adjacent units" forms a ring includes not only the case where a set of two adjacent units is bonded as in the previous example, but also the case where a set of three or more adjacent units is bonded. For example, R 921 and R 922 and are bonded to ring Q A and R 922 and R923 and are bonded to ring Q C The three adjacent (R 921 , R 922 and R 923 In this case, the anthracene compound represented by the general formula (TEMP-103) is represented by the following general formula (TEMP-105). In the following general formula (TEMP-105), the ring Q A and Ring Q C is R 922 Share.

[0108] [ka]

[0109] The "monocyclic ring" or "condensed ring" formed may be a saturated or unsaturated ring as the structure of only the ring formed. Even when "one of the pairs of adjacent two" forms a "monocyclic ring" or a "condensed ring", the "monocyclic ring" or the "condensed ring" may form a saturated or unsaturated ring. For example, the ring Q formed in the general formula (TEMP-104) may be a saturated or unsaturated ring. A and Ring Q B are "monocyclic" or "condensed rings". In addition, the ring Q formed in the general formula (TEMP-105) A , and ring Q C is a "fused ring". The ring Q in the above general formula (TEMP-105) A and Kan Q C That is, Ring Q A and Kan Q C The ring Q in the general formula (TEMP-104) is condensed to form a condensed ring. A If is a benzene ring, then ring Q A The ring Q in the general formula (TEMP-104) is a monocyclic ring. A If is a naphthalene ring, then ring Q A is a fused ring.

[0110] The term "unsaturated ring" refers to an aromatic hydrocarbon ring or an aromatic heterocyclic ring. The term "saturated ring" refers to an aliphatic hydrocarbon ring or a non-aromatic heterocyclic ring. Specific examples of the aromatic hydrocarbon ring include structures in which the groups given as specific examples in the specific example group G1 are terminated with a hydrogen atom. Specific examples of the aromatic heterocycle include structures in which the aromatic heterocyclic groups exemplified as specific examples in the specific example group G2 are terminated with a hydrogen atom. Specific examples of the aliphatic hydrocarbon ring include structures in which the groups given as specific examples in the specific example group G6 are terminated with a hydrogen atom. The term "form a ring" means that a ring is formed only with a plurality of atoms of the parent skeleton, or with a plurality of atoms of the parent skeleton and one or more optional elements. For example, R 921 and R 922 and are bonded together to form a ring Q A is R 921 The carbon atom of the anthracene skeleton to which R is bonded 922 It means a ring formed by the carbon atom of the anthracene skeleton to which R is bonded and one or more arbitrary elements. 921 and R 922 Todekan Q A In the case where R 921 The carbon atom of the anthracene skeleton to which R is bonded 922 When the carbon atom of the anthracene skeleton to which R is bonded forms a monocyclic unsaturated ring with four carbon atoms, R 921 and R 922 The ring formed by this is a benzene ring.

[0111] Here, unless otherwise specified in the present specification, the "arbitrary element" is preferably at least one element selected from the group consisting of carbon, nitrogen, oxygen, and sulfur. In the arbitrary element (for example, in the case of a carbon element or a nitrogen element), a bond that does not form a ring may be terminated with a hydrogen atom or the like, or may be substituted with an "arbitrary substituent" described below. When an arbitrary element other than a carbon element is included, the ring formed is a heterocycle. Unless otherwise specified in this specification, the "one or more arbitrary elements" constituting a single ring or a condensed ring is preferably 2 or more and 15 or less, more preferably 3 or more and 12 or less, and even more preferably 3 or more and 5 or less. Unless otherwise specified in this specification, of the "monocyclic ring" and the "condensed ring", the "monocyclic ring" is preferred. Unless otherwise specified in this specification, of the "saturated ring" and the "unsaturated ring", the "unsaturated ring" is preferred. Unless otherwise specified in this specification, a "monocyclic ring" is preferably a benzene ring. Unless otherwise specified in this specification, the "unsaturated ring" is preferably a benzene ring. When "one or more of a set of two or more adjacent rings" "combine with each other to form a substituted or unsubstituted monocyclic ring" or "combine with each other to form a substituted or unsubstituted fused ring", unless otherwise specified in this specification, preferably, one or more of a set of two or more adjacent rings combine with each other to form a substituted or unsubstituted "unsaturated ring" consisting of a plurality of atoms of the parent skeleton and at least one element selected from the group consisting of 1 to 15 carbon elements, nitrogen elements, oxygen elements, and sulfur elements.

[0112] When the above-mentioned "monocyclic ring" or "condensed ring" has a substituent, the substituent is, for example, the "optional substituent" described later. When the above-mentioned "monocyclic ring" or "condensed ring" has a substituent, specific examples of the substituent are the substituents described in the above-mentioned section "Substituents described in this specification". When the above-mentioned "saturated ring" or "unsaturated ring" has a substituent, the substituent is, for example, the "optional substituent" described below. When the above-mentioned "monocyclic ring" or "condensed ring" has a substituent, specific examples of the substituent are the substituents described in the above section "Substituents described in this specification". The above is an explanation of the case where "one or more pairs of adjacent groups bond with each other to form a substituted or unsubstituted monocyclic ring" and the case where "one or more pairs of adjacent groups bond with each other to form a substituted or unsubstituted fused ring" ("combined to form a ring").

[0113] Substituents in the phrase "substituted or unsubstituted" In one embodiment of the present specification, the substituent in the case of "substituted or unsubstituted" (sometimes referred to as "optional substituent" in the present specification) is, for example, an unsubstituted alkyl group having 1 to 50 carbon atoms, an unsubstituted alkenyl group having 2 to 50 carbon atoms, an unsubstituted alkynyl group having 2 to 50 carbon atoms; an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms; -Si(R 901 )(R 902 )(R 903 ), -O-(R 904 ), -S-(R 905 ), -N(R 906 )(R 907 ), Halogen atoms, cyano groups, nitro groups, an unsubstituted aryl group having 6 to 50 ring carbon atoms, and Unsubstituted heterocyclic group having 5 to 50 ring atoms and the like, Here, R 901 ~R 907 are each independently Hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are identical or different from each other, R 906 If there are two or more, there are two or more R 906 are identical or different from each other, R 907 If there are two or more, there are two or more R 907 are the same or different from each other.

[0114] In one embodiment, the substituent in the above "substituted or unsubstituted" is: an alkyl group having 1 to 50 carbon atoms; an aryl group having 6 to 50 ring carbon atoms, and Heterocyclic groups with 5 to 50 ring atoms is a group selected from the group consisting of:

[0115] In one embodiment, the substituent in the above "substituted or unsubstituted" is: an alkyl group having 1 to 18 carbon atoms; An aryl group having 6 to 18 ring carbon atoms, and Heterocyclic groups with 5 to 18 ring atoms is a group selected from the group consisting of:

[0116] Specific examples of each group of the above optional substituents are the specific examples of the substituents described above in the section "Substituents described in this specification."

[0117] Unless otherwise specified in this specification, any adjacent substituents may be combined with each other to form a "saturated ring" or an "unsaturated ring", preferably a substituted or unsubstituted saturated 5-membered ring, a substituted or unsubstituted saturated 6-membered ring, a substituted or unsubstituted unsaturated 5-membered ring, or a substituted or unsubstituted unsaturated 6-membered ring, more preferably a benzene ring. Unless otherwise specified in the present specification, the optional substituent may further have a substituent. The substituent that the optional substituent further has is the same as the optional substituent described above.

[0118] In this specification, a numerical range expressed using "AA to BB" means a range including the number AA written before "AA to BB" as the lower limit and the number BB written after "AA to BB" as the upper limit.

[0119] The compounds of the present invention will be described below. The compound of the present invention is represented by the above formula (A), (B), or (C). Below, the symbols in the formula (A), (B), or (C), and each formula contained in the formula (A), (B), or (C) will be explained. Unless otherwise specified, the same symbols have the same meaning. The compounds of the present invention represented by formula (A) or (B) or (C), and the formulae contained in formula (A) or (B) or (C) described below, may be referred to as "invention compounds."

[0120] The first compound of the present invention (invention compound (A)) is represented by the following formula (A). [ka]

[0121] In formula (A), N * is the central nitrogen atom. Ar a1 represents a substituted or unsubstituted aryl group having 6 to 30, preferably 6 to 18, and more preferably 6 to 12 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30, preferably 5 to 18, and more preferably 5 to 12 ring atoms.

[0122] The Ar a1 The unsubstituted aryl group having 6 to 30 ring carbon atoms represented by the formula (I) is, for example, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, an anthryl group, a benzanthryl group, a phenanthryl group, a benzophenanthryl group, a phenalenyl group, a pyrenyl group, a chrysenyl group, a benzochrysenyl group, a fluorenyl group, a fluoranthenyl group, a perylenyl group, or a triphenylenyl group, preferably a phenyl group, a biphenylyl group, a terphenylyl group, or a naphthyl group, more preferably a phenyl group, a p-biphenyl group, an m- biphenyl group, o-biphenyl group, p-terphenyl-4-yl group, p-terphenyl-3-yl group, p-terphenyl-2-yl group, m-terphenyl-4-yl group, m-terphenyl-3-yl group, m-terphenyl-2-yl group, o-terphenyl-4-yl group, o-terphenyl-3-yl group, o-terphenyl-2-yl group, or 1- or 2-naphthyl group, and more preferably phenyl group, p-biphenyl group, m-biphenyl group, o-biphenyl group, or 1- or 2-naphthyl group.

[0123] The Ar a1Examples of the unsubstituted heterocyclic group having 5 to 30 ring carbon atoms represented by the formula (I) include a pyrrolyl group, an imidazolyl group, a pyrazolyl group, a triazolyl group, a tetrazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, a pyridyl group, a pyridazinyl group, a pyrimidinyl group, a pyrazinyl group, a triazinyl group, an indolyl group, an isoindolyl group, an indolizinyl group, a quinolizinyl group, a quinolyl group, an isoquinolyl group, a cinnolyl group, a phthalazinyl group, a quinazolinyl group, a quinoxalinyl group, a benzimidazolyl group, an indazolyl group, a phenanthrolinyl group, a phenanthridinyl group, an acridinyl group, a phenazinyl group, a carbazolyl group, a benzocarbazolyl group, a furyl group, a xanthyl group, a quinazolyl group, a quinazin ... and preferably a carbazolyl group (a 9-carbazolyl group, or a 1-, 2-, 3- or 4-carbazolyl group), a benzofuranyl group, an isobenzofuranyl group, a naphthobenzofuranyl group, a benzoxazolyl group, a benzisoxazolyl group, a phenoxazinyl group, a thienyl group, a benzothiophenyl group, an isobenzothiophenyl group, a dibenzothiophenyl group, a naphthobenzothiophenyl group, a benzothiazolyl group, a benzisothiazolyl group, or a phenothiazinyl group.

[0124] Ar a1 is preferably a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, more preferably a substituted or unsubstituted aryl group having 6 to 18 ring carbon atoms, and even more preferably a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms.

[0125] Ar a2 is a group represented by the following formula (A1). [ka]

[0126] In formula (A1), *1 is La2 is the binding site to

[0127] A and B each independently represent a substituted or unsubstituted benzene ring, a substituted or unsubstituted naphthalene ring, or a substituted or unsubstituted phenanthrene ring; One selected from A and B is bonded to *2 via a single bond.

[0128] A and B are each independently preferably a substituted or unsubstituted benzene ring, or a substituted or unsubstituted naphthalene ring, more preferably an unsubstituted benzene ring or an unsubstituted naphthalene ring.

[0129] Formula (A1) is preferably the following formula (A1-1) or (A1-2), more preferably formula (A1-2).

[0130] [ka]

[0131] In formula (A1-1), *3 is L a2 is the binding site to R a21 ~R a28 One selected from is a single bond bonded to *4, and R that is not a single bond bonded to *4 a21 ~R a28 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other.

[0132] In one embodiment of the present invention, preferably R a21 , R a23 and R a24 , more preferably R a21 and R a24 One of the bonds selected from is a single bond bonded to *4.

[0133] R that is not a single bond bonded to *4 a21 ~R a28 The details of the halogen atom represented by are as described above in the section "Substituents described in this specification", and preferably it is a fluorine atom.

[0134] R that is not a single bond bonded to *4 a21 ~R a28Details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by are as described above in the section "Substituents described in this specification." The unsubstituted alkyl group is preferably a methyl group, an ethyl group, an n-propyl group, an isopropyl group, or a t-butyl group, and more preferably a methyl group, an isopropyl group, or a t-butyl group.

[0135] R that is not a single bond bonded to *4 a21 ~R a28 Details of the unsubstituted alkenyl group having 2 to 50 carbon atoms represented by are as described above in the section "Substituents described in this specification."

[0136] R that is not a single bond bonded to *4 a21 ~R a28 Details of the unsubstituted alkynyl group having 2 to 50 carbon atoms represented by are as described above in the section "Substituents described in this specification."

[0137] R that is not a single bond bonded to *4 a21 ~R a28 Details of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by the formula (I) are as described above in the section "Substituents described in this specification." The unsubstituted cycloalkyl group is preferably a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, or an adamantyl group.

[0138] R that is not a single bond bonded to *4 a21 ~R a28 Details of the unsubstituted aralkyl group having 7 to 50 carbon atoms represented by are as described above in the section "Substituents described in this specification."

[0139] R that is not a single bond bonded to *4 a21 ~R a28 Details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (I) are as described above in the section "Substituents described in this specification." The unsubstituted aryl group is preferably a phenyl group, a biphenylyl group, a terphenylyl group, a naphthyl group, or a fluorenyl group.

[0140] R that is not a single bond bonded to *4 a21 ~R a28 Details of the unsubstituted heterocyclic group having 5 to 50 ring atoms represented by the formula (I) are as described above in the section "Substituents described in this specification." The unsubstituted heterocyclic group is preferably a dibenzofuranyl group, a dibenzothiophenyl group, or a carbazolyl group.

[0141] R 901 ~R 905 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0142] R 901 ~R 905 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0143] R 901 ~R 905 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0144] R 901 ~R 905 The details and preferred examples of the substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms represented by R a21 ~R a28 As described above.

[0145] R that is not a single bond bonded to *4 a21~R a28 may all be hydrogen atoms.

[0146] In formula (A1-2), *5 is L a2 is the binding site to R a31 ~R a40 One selected from is a single bond bonded to *6, and R that is not a single bond bonded to *6 a31 ~R a40 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other.

[0147] In one embodiment of the present invention, preferably R a31 ~R a34 More preferably, one selected from R a31 and R a34 1 selected from is a single bond bonded to *6.

[0148] R that is not a single bond bonded to *6 a31 ~R a40 The details of the halogen atom represented by R a21 ~R a28 As described above.

[0149] R that is not a single bond bonded to *6 a31 ~R a40 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0150] R that is not a single bond bonded to *6 a31 ~R a40 The details of the unsubstituted alkenyl group having 2 to 50 carbon atoms represented by R a21 ~R a28 As described above.

[0151] R that is not a single bond bonded to *6 a31 ~R a40 The details of the unsubstituted alkynyl group represented by R a21 ~R a28As described above.

[0152] R that is not a single bond bonded to *6 a31 ~R a40 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0153] R that is not a single bond bonded to *6 a31 ~R a40 The details of the unsubstituted aralkyl group having 7 to 50 carbon atoms represented by the formula (1) are as follows: a21 ~R a28 As described above.

[0154] R that is not a single bond bonded to *6 a31 ~R a40 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0155] R that is not a single bond bonded to *6 a31 ~R a40 The details of the unsubstituted heterocyclic group having 5 to 50 ring atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0156] R 901 ~R 905 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0157] R 901 ~R 905The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0158] R 901 ~R 905 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0159] R 901 ~R 905 The details and preferred examples of the substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms represented by R a21 ~R a28 As described above.

[0160] R that is not a single bond bonded to *4 a31 ~R a40 may all be hydrogen atoms.

[0161] Formula (A1) may be formula (A1-1-1) or (A1-2-1) described below.

[0162] L a1 ~L a3 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 30, preferably 6 to 18, and more preferably 6 to 12, ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 30, preferably 6 to 18, and more preferably 6 to 12 ring atoms.

[0163] Said L a1 ~L a3The unsubstituted arylene group having 6 to 30 ring carbon atoms represented by the formula (I) is, for example, a phenylene group, a biphenylene group, a terphenylene group, a naphthylene group, an anthrylene group, a benzoanthrylene group, a phenanthrylene group, a benzophenanthrylene group, a phenalenylene group, a picenylene group, a pentaphenylene group, a pyrenylene group, a chrysenylene group, a benzochrysenylene group, a triphenylenylene group, a fluoranthenylene group, a fluorenylene group, or a 9,9'-spirobifluorenylene group, and is preferably a phenylene group, a biphenylene group, a terphenylene group, or a naphthylene group.

[0164] Said L a1 ~L a3 The unsubstituted divalent heterocyclic group having 5 to 30 ring atoms represented by the formula (I) is a divalent group obtained by removing one hydrogen atom from an unsubstituted heterocyclic group having 5 to 30 ring atoms. Said L a1 ~L a3 The details and preferred examples of the unsubstituted heterocyclic ring having 5 to 30 ring atoms represented by the above Ar a1 As described above.

[0165] Said L a1 is preferably a single bond, or a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, more preferably a single bond, or a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms, even more preferably a single bond, or a substituted or unsubstituted phenylene group, still more preferably a single bond or an unsubstituted phenylene group, and even more preferably a single bond or an unsubstituted p-phenylene group.

[0166] Said L a2 is preferably a single bond or a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, more preferably a single bond or a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms, even more preferably a single bond or a substituted or unsubstituted phenylene group, still more preferably a single bond or an unsubstituted phenylene group, and even more preferably a single bond or an unsubstituted p-phenylene group.

[0167] Said La3 is preferably a single bond, or a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, more preferably a single bond, or a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms, even more preferably a single bond, or a substituted or unsubstituted phenylene group, still more preferably a single bond or an unsubstituted phenylene group, and even more preferably a single bond or an unsubstituted p-phenylene group.

[0168] -L a1 -Ar a1 is preferably represented by the following formula: In the following formula, R (substituent) is omitted for simplicity. R is R that is not a single bond bonded to the above *4 a21 ~R a28 is equivalent to.

[0169] [ka]

[0170] -L a1 -Ar a1 is more preferably represented by the following formula: In the following formula, R (substituent) is omitted for simplicity. R is R that is not a single bond bonded to the above *4 a21 ~R a28 is equivalent to.

[0171] [ka]

[0172] R a1 ~R a13each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other.

[0173] R a1 ~R a13The details of the halogen atom represented by R a21 ~R a28 As described above.

[0174] R a1 ~R a13 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0175] R a1 ~R a13 The details of the unsubstituted alkenyl group having 2 to 50 carbon atoms represented by R a21 ~R a28 As described above.

[0176] R a1 ~R a13 The details of the unsubstituted alkynyl group represented by R a21 ~R a28 As described above.

[0177] R a1 ~R a13 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0178] R a1 ~R a13 The details of the unsubstituted aralkyl group having 7 to 50 carbon atoms represented by the formula (1) are as follows: a21 ~R a28 As described above.

[0179] R a1 ~R a13 The details of the unsubstituted heterocyclic group having 5 to 50 ring atoms represented by the formula (1) and preferred examples thereof are as follows:a21 ~R a28 As described above.

[0180] R 901 ~R 905 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0181] R 901 ~R 905 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0182] R 901 ~R 905 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0183] R 901 ~R 905 The details and preferred examples of the substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms represented by R a21 ~R a28 As described above.

[0184] R a1 ~R a13 may all be hydrogen atoms.

[0185] X a1 is an oxygen atom or a sulfur atom, and is preferably an oxygen atom.

[0186] L a2 and L a3 is an unsubstituted p-phenylene group, formula (A1) is the following formula (A1-1), and R a124 and Ra125 When one selected from is a single bond bonded to *8, -L a1 -Ar a1 means, except for the unsubstituted p-biphenyl group, L a3 is a single bond, and L a2 is an unsubstituted o-phenylene group, and formula (A1) is the following formula (A1-2-1), R a131 ~R a133 , and R a135 ~R a140 One selected from is a single bond bonded to *10. [ka]

[0187] In formula (A1-1-1), *3 is L a2 is the binding site to R a121 ~R a128 One selected from is a single bond bonded to *8, and R that is not a single bond bonded to *8 a121 ~R a128 is a hydrogen atom. In formula (A1-2-1), *5 is L a2 is the binding site to R a131 ~R a140 One selected from is a single bond bonded to *10, and R is not a single bond bonded to *10 a131 ~R a140 is a hydrogen atom.

[0188] The second compound of the present invention (invention compound (B)) is represented by the following formula (B). [ka]

[0189] In formula (B), N * is the central nitrogen atom. Ar b1 and Ar b2are each independently a substituted or unsubstituted aryl group having 6 to 30, preferably 6 to 18, and more preferably 6 to 12 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30, preferably 5 to 18, and more preferably 5 to 12 ring atoms.

[0190] The Ar b1 and Ar b2 The details of the unsubstituted aryl group having 6 to 30 ring carbon atoms represented by the above and preferred examples thereof are as follows: a1 As described above. The Ar b1 and Ar b2 The details of the unsubstituted heterocyclic group having 5 to 30 ring atoms represented by the above and preferred examples thereof are as follows: a1 As described above.

[0191] Ar b1 and Ar b2 is preferably a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, more preferably an aryl group having 6 to 18 ring carbon atoms, and even more preferably an aryl group having 6 to 12 ring carbon atoms.

[0192] L b1 ~L b3 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 30, preferably 6 to 18, and more preferably 6 to 12 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 30, preferably 5 to 18, and more preferably 5 to 12 ring atoms.

[0193] Said L b1 ~L b3 The details of the unsubstituted arylene group having 6 to 30 ring carbon atoms represented by the formula (I) and preferred examples thereof are as follows: a1 ~L a3 As described above.

[0194] Said L b1 ~L b3 The unsubstituted divalent heterocyclic group having 5 to 30 ring atoms represented by the formula (I) is a divalent group obtained by removing one hydrogen atom from an unsubstituted heterocyclic group having 5 to 30 ring atoms. Said L b1 ~L b3 The details and preferred examples of the unsubstituted heterocyclic ring having 5 to 30 ring atoms represented by the above Ar a1 As described above.

[0195] Said L b1 is preferably a single bond, or a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, more preferably a single bond, or a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms, even more preferably a single bond, or a substituted or unsubstituted phenylene group, still more preferably a single bond or an unsubstituted phenylene group, and even more preferably a single bond or an unsubstituted p-phenylene group.

[0196] Said L b2 is preferably a single bond, or a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, more preferably a single bond, or a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms, even more preferably a single bond, or a substituted or unsubstituted phenylene group, still more preferably a single bond or an unsubstituted phenylene group, and even more preferably a single bond or an unsubstituted p-phenylene group.

[0197] Said L b3 is preferably a single bond, or a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, more preferably a single bond, or a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms, and even more preferably a single bond, or a group represented by the following formula (B2) or (B3).

[0198] [ka]

[0199] In formula (B2), *b1 is the central nitrogen atom N * and *b3 is the bonding position to the benzene ring. R b31 ~R b35One selected from is a single bond bonded to *b2, and R is not a single bond bonded to *b2. b31 ~R b35 is a non-single bond R bonded to *8 and *9 described below. b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 is equivalent to. *R that is not a single bond attached to b2 b31 ~R b35 may all be hydrogen atoms.

[0200] In formula (B3), *b4 is the central nitrogen atom N * and *b7 is the bonding position to the benzene ring. R b41 ~R b45 is a single bond bonded to *b5, and R b51 ~R b55 one selected from is a single bond bonded to *b6, *R that is not a single bond attached to b5 b41 ~R b45 and *b6 is bonded to a non-single bond R b51 ~R b55 is a non-single bond R bonded to *8 and *9 described below. b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 is equivalent to. In one embodiment of the present invention, R b45 is a single bond that bonds to *b5, and R b52 and R b54 It is preferable that one selected from is a single bond bonded to *b6. * Non-single bond R bonded to b5 b41 ~R b45 and *b6 is bonded to a non-single bond R b51 ~R b55 may all be hydrogen atoms.

[0201] In one embodiment of the present invention, preferably L b1 ~L b3 At least one hydrogen atom selected from the hydrogen atoms contained in the formula (I) is a deuterium atom.

[0202] -L b1 -Ar b1 And-L b2 -Ar b2 are each independently preferably represented by the following formula: In the following formula, R (substituent) is omitted for simplicity. R is not a single bond bonded to *8 and *9 described below. b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 is equivalent to.

[0203] [ka]

[0204] -L b1 -Ar b1 And-L b2 -Ar b2 are each independently more preferably represented by the following formula: In the following formula, R (substituent) is omitted for simplicity. R is not a single bond bonded to *8 and *9 described below. b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 is equivalent to.

[0205] [ka]

[0206] R b1 ~R b13each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other.

[0207] R b1 ~R b13The details of the halogen atom represented by R a21 ~R a28 As described above.

[0208] R b1 ~R b13 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0209] R b1 ~R b13 The details of the unsubstituted alkenyl group having 2 to 50 carbon atoms represented by R a21 ~R a28 As described above.

[0210] R b1 ~R b13 The details of the unsubstituted alkynyl group represented by R a21 ~R a28 As described above.

[0211] R b1 ~R b13 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0212] R b1 ~R b13 The details of the unsubstituted aralkyl group having 7 to 50 carbon atoms represented by the formula (1) are as follows: a21 ~R a28 As described above.

[0213] R b1 ~R b13 The details of the unsubstituted heterocyclic group having 5 to 50 ring atoms represented by the formula (1) and preferred examples thereof are as follows:a21 ~R a28 As described above.

[0214] R 901 ~R 905 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0215] R 901 ~R 905 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0216] R 901 ~R 905 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0217] R 901 ~R 905 The details and preferred examples of the substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms represented by R a21 ~R a28 As described above.

[0218] R b1 ~R b13 may all be hydrogen atoms.

[0219] Central nitrogen atom N * Adjacent to L b1 ~L b3 , Ar b1 and Ar b2 At least one hydrogen atom selected from the hydrogen atoms contained in is a deuterium atom.

[0220] Lb3 is an unsubstituted p-phenylene group, and Ar b1 and Ar b2 are both unsubstituted naphthyl groups, and L b1 and L b2 When at least one selected from the above is a biphenylene group, the biphenylene group is represented by the following formula (B1).

[0221] [ka]

[0222] In formula (B1), *7 is the central nitrogen atom N * is the bond position to Ar b1 Or Ar b2 is the binding site to R b21 ~R b25 is a single bond bonded to *8, and R b26 , R b28 and R b30 is a single bond bonded to *9, and R is not a single bond bonded to *8 and *9 b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other.

[0223] R that is not a single bond bonded to *8 and *9 b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 The details of the halogen atom represented by R a21 ~R a28 As described above.

[0224] R that is not a single bond bonded to *8 and *9 b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0225] R that is not a single bond bonded to *8 and *9 b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 The details of the unsubstituted alkenyl group having 2 to 50 carbon atoms represented by R a21 ~R a28 As described above.

[0226] R that is not a single bond bonded to *8 and *9 b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 The details of the unsubstituted alkynyl group represented by R a21 ~R a28 As described above.

[0227] R that is not a single bond bonded to *8 and *9 b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0228] R that is not a single bond bonded to *8 and *9 b21 ~R b25 , R b26 , R b28 and R b30 , and Rb27 and R b29 The details of the unsubstituted aralkyl group having 7 to 50 carbon atoms represented by the formula (1) are as follows: a21 ~R a28 As described above.

[0229] R that is not a single bond bonded to *8 and *9 b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0230] R that is not a single bond bonded to *8 and *9 b21 ~R b25 , R b26 , R b28 and R b30 , and R b27 and R b29 The details of the unsubstituted heterocyclic group having 5 to 50 ring atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0231] R 901 ~R 905 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0232] R 901 ~R 905 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0233] R 901 ~R 905 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0234] R 901 ~R 905 The details and preferred examples of the substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms represented by R a21 ~R a28 As described above.

[0235] The third compound of the present invention (invention compound (C)) is represented by the following formula (C). [ka]

[0236] In formula (C), N * is the central nitrogen atom. Ar c1 represents a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by the following formula (C1).

[0237] [ka]

[0238] R c31 ~R c38 is a single bond bonded to *13, and R is not a single bond bonded to *13. c31 ~R c38 , and R c39 and R c40each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other.

[0239] R that is not a single bond bonded to *13 c31 ~R c38 , and R c39 and R c40 The details of the halogen atom represented by R a21 ~R a28 As described above.

[0240] R that is not a single bond bonded to *13 c31 ~R c38 , and R c39 and R c40 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0241] R that is not a single bond bonded to *13 c31 ~R c38 , and R c39 and R c40 The details of the unsubstituted alkenyl group having 2 to 50 carbon atoms represented by R a21 ~R a28 As described above.

[0242] R that is not a single bond bonded to *13 c31 ~R c38 , and R c39 and R c40 The details of the unsubstituted alkynyl group represented by R a21 ~R a28 As described above.

[0243] R that is not a single bond bonded to *13 c31 ~R c38 , and R c39 and R c40 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0244] R that is not a single bond bonded to *13 c31 ~R c38 , and R c39 and R c40 The details of the unsubstituted aralkyl group having 7 to 50 carbon atoms represented by the formula (1) are as follows: a21 ~R a28 As described above.

[0245] R that is not a single bond bonded to *13 c31 ~R c38 , and R c39 and R c40 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0246] R that is not a single bond bonded to *13 c31 ~R c38 , and R c39 and R c40 The details of the unsubstituted heterocyclic group having 5 to 50 ring atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0247] R 901 ~R 905 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0248] R 901 ~R 905 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0249] R 901 ~R 905 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0250] R 901 ~R 905 The details and preferred examples of the substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms represented by R a21 ~R a28 As described above.

[0251] R that is not a single bond bonded to *13 c31 ~R c38 , and R c39 and R c40 may all be hydrogen atoms.

[0252] Ar c1 is preferably a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, or a substituted or unsubstituted biphenyl group.

[0253] L c1 ~L c3 are each independently a single bond, or a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms.

[0254] Said L c1 ~L c3 The unsubstituted arylene group having 6 to 12 ring carbon atoms represented by the formula (I) is, for example, a phenylene group, a biphenylene group, or a naphthylene group.

[0255] Said L c1 is preferably a single bond, or a substituted or unsubstituted phenylene group, and more preferably a single bond or an unsubstituted phenylene group.

[0256] Said L c2is preferably a single bond, or a substituted or unsubstituted phenylene group, and more preferably a single bond or an unsubstituted phenylene group.

[0257] Said L c3 is preferably a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms, and more preferably a group represented by the following formula (C4).

[0258] [ka]

[0259] In formula (C4), *c1 is the central nitrogen atom N * and *c2 is the bonding position to ring C. R b61 ~R b68 is a non-single bond R bonded to the above *13 c31 ~R c38 , and R c39 and R c40 is the same as R b61 ~R b68 may all be hydrogen atoms.

[0260] -L c1 -Ar c1 is preferably represented by the following formula: In the following formula, R (substituent) is omitted for simplicity. R is R that is not a single bond bonded to the above *13 c31 ~R c38 , and R c39 and R c40 is equivalent to.

[0261] [ka]

[0262] -L c1 -Ar c1 is more preferably represented by the following formula: In the following formula, R (substituent) is omitted for simplicity. R is R that is not a single bond bonded to the above *13 c31 ~R c38 , and R c39 and R c40 is equivalent to.

[0263] [ka]

[0264] R c1 ~R c13 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903are identical or different from each other, R 904 If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other.

[0265] R c1 ~R c13 The details of the halogen atom represented by R a21 ~R a28 As described above.

[0266] R c1 ~R c13 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0267] R c1 ~R c13 The details of the unsubstituted alkenyl group having 2 to 50 carbon atoms represented by R a21 ~R a28 As described above.

[0268] R c1 ~R c13 The details of the unsubstituted alkynyl group represented by R a21 ~R a28 As described above.

[0269] R c1 ~R c13 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0270] R c1 ~R c13 The details of the unsubstituted aralkyl group having 7 to 50 carbon atoms represented by the formula (1) are as follows: a21 ~R a28 As described above.

[0271] R c1 ~R c13 The details of the unsubstituted heterocyclic group having 5 to 50 ring atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0272] R 901 ~R 905 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0273] R 901 ~R 905 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0274] R 901 ~R 905 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0275] R 901 ~R 905 The details and preferred examples of the substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms represented by R a21 ~R a28 As described above.

[0276] Rc1 ~R c13 may all be hydrogen atoms.

[0277] R c21 ~R c28 One selected from is a single bond bonded to *11, and R that is not a single bond bonded to *11 c21 ~R c28 each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ) is a group represented by R 901 ~R 905 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, R 901 If there are two or more, there are two or more R 901 are identical or different from each other, R 902 If there are two or more, there are two or more R 902 are identical or different from each other, R 903 If there are two or more, there are two or more R 903 are identical or different from each other, R 904If there are two or more, there are two or more R 904 are identical or different from each other, R 905 If there are two or more, there are two or more R 905 are the same as or different from each other.

[0278] R that is not a single bond bonded to *11 c21 ~R c28 The details of the halogen atom represented by R a21 ~R a28 As described above.

[0279] R that is not a single bond bonded to *11 c21 ~R c28 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0280] R that is not a single bond bonded to *11 c21 ~R c28 The details of the unsubstituted alkenyl group having 2 to 50 carbon atoms represented by R a21 ~R a28 As described above.

[0281] R that is not a single bond bonded to *11 c21 ~R c28 The details of the unsubstituted alkynyl group represented by R a21 ~R a28 As described above.

[0282] R that is not a single bond bonded to *11 c21 ~R c28 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0283] R that is not a single bond bonded to *11 c21 ~R c28 The details of the unsubstituted aralkyl group having 7 to 50 carbon atoms represented by the formula (1) are as follows: a21 ~R a28 As described above.

[0284] R that is not a single bond bonded to *11 c21 ~R c28 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0285] R that is not a single bond bonded to *11 c21 ~R c28 The details of the unsubstituted heterocyclic group having 5 to 50 ring atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0286] R 901 ~R 905 The details of the unsubstituted alkyl group having 1 to 50 carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28 As described above.

[0287] R 901 ~R 905 The details and preferred examples of the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms represented by R a21 ~R a28 As described above.

[0288] R 901 ~R 905 The details of the unsubstituted aryl group having 6 to 50 ring carbon atoms represented by the formula (1) and preferred examples thereof are as follows: a21 ~R a28As described above.

[0289] R 901 ~R 905 The details and preferred examples of the substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms represented by R a21 ~R a28 As described above.

[0290] R that is not a single bond bonded to *11 c21 ~R c28 may all be hydrogen atoms.

[0291] L c3 is the following formula (C2), and L a1 is a single bond, and L a2 is an unsubstituted p-phenylene group, Ar c1 represents a substituted or unsubstituted naphthyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by formula (C1), L c3 is an unsubstituted m-phenylene group, and L c2 is a p-phenylene group, R c21 , R c24 , R c25 , and R c28 one selected from is a single bond bonded to *13, L c3 is the following formula (C3), and L a1 and L a2 is an unsubstituted p-phenylene group, Ar c1 represents a substituted or unsubstituted naphthyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by formula (C1), L c3 is the following formula (C3), and L a1 is a single bond, and L a2 is an unsubstituted p-phenylene group, Ar c1represents a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted terphenyl group, or a group represented by formula (C1) above, L c2 and L c3 is an unsubstituted p-phenylene group, Ar c1 represents a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by the above formula (C1).

[0292] [ka]

[0293] In formula (C2), *14 is the bond position to the ring C, and *16 is the central nitrogen atom N * is the binding site to R c42 and R c44 is a single bond bonded to *15, and R is not a single bond bonded to *15. c42 and R c44 , R c41 , R c43 , and R c45 ~R c49 is a hydrogen atom. In formula (C3), *17 is the bond position to the ring C, and *19 is the central nitrogen atom N * is the binding site to R c56 and R c58 One selected from is a single bond bonded to *18, and R that is not a single bond bonded to *18 c56 and R c58 , R c51 ~R c55 , R c57 And R c59 is a hydrogen atom.

[0294] As described above, the central nitrogen atom N * Adjacent to L b1 ~L b3 , Arb1 and Ar b2 At least one hydrogen atom selected from the hydrogen atoms in is a deuterium atom. The deuterium atom may be a naturally occurring deuterium atom, or may be intentionally introduced by using a compound in which a part or all of the raw material compound is deuterated. As described above, the term "hydrogen atom" as used herein includes protium, deuterium, and tritium atoms. Therefore, the invention compounds represented by formulas (A) and (C) may also contain naturally occurring deuterium atoms, and the invention compound represented by formula (B) may contain a central nitrogen atom N * Adjacent to L b1 ~L b3 , Ar b1 and Ar b2 In addition to at least one deuterium atom selected from the hydrogen atoms contained in the compound, the compound may contain a naturally occurring deuterium atom. In addition, deuterium atoms may be intentionally introduced into the compound of the invention by using compounds in which some or all of the raw materials are deuterated. Therefore, in one embodiment of the present invention, the compound of the invention represented by formula (A) or (C) contains at least one deuterium atom, i.e., the compound of the invention may be a compound represented by formula (A) in which at least one of the hydrogen atoms contained in the compound is a deuterium atom, or the compound of the invention may be a compound represented by formula (C) in which at least one of the hydrogen atoms contained in the compound is a deuterium atom.

[0295] At least one hydrogen atom selected from the following hydrogen atoms may be a deuterium atom. In the following, "substituted or unsubstituted", the number of carbon atoms and the number of atoms are omitted. Ar in formula (A) a1 A hydrogen atom possessed by the aryl group and heterocyclic group represented by the formula (I); Ar in formula (A) a2 a hydrogen atom possessed by the group represented by formula (A1); L in formula (A) a1 ~L a3 when any one of the above is an arylene group or a divalent heterocyclic group, a hydrogen atom contained therein; R in formula (A) a1 ~R a13 A hydrogen atom represented by any of the following: R in formula (A) a1 ~R a13 Any of the following is an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, a heterocyclic group, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ), the hydrogen atoms contained therein; when formula (A1) in formula (A) is formula (A1-1), a hydrogen atom possessed by the group represented by formula (A1-1); when formula (A1) in formula (A) is formula (A1-2), a hydrogen atom possessed by the group represented by formula (A1-2); Ar in formula (B) b1 and Ar b2 A hydrogen atom possessed by the aryl group and heterocyclic group represented by the formula (I); L in formula (B) b1 ~L b3 when any one of the above is an arylene group or a divalent heterocyclic group, a hydrogen atom contained therein; R in formula (B) b1 ~R b13 A hydrogen atom represented by any of the following: R in formula (B) b1 ~R b13 Any of the following is an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, a heterocyclic group, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ), the hydrogen atoms contained therein; a hydrogen atom possessed by the group represented by formula (B1) in formula (B); Ar in formula (C) c1 a hydrogen atom possessed by a phenyl group, a naphthyl group, a biphenyl group, a terphenyl group, or a group represented by formula (C1); L in formula (C) c1 ~L c3when any one of the above is an arylene group or a divalent heterocyclic group, a hydrogen atom contained therein; R that is not a single bond bonded to *11 in formula (C) c21 ~R c28 A hydrogen atom represented by any of the following: R that is not a single bond bonded to *11 in formula (C) c21 ~R c28 Any of the following is an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, an aryl group, a heterocyclic group, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ), the hydrogen atoms contained therein; R in formula (C) c1 ~R c13 A hydrogen atom represented by any of the following: R in formula (C) c1 ~R c13 Any of the following is an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, a heterocyclic group, -Si(R 901 )(R 902 )(R 903 ), a group represented by -O-(R 904 ), or -S-(R 905 ), the hydrogen atoms contained therein; L in formula (C) c3 is a group represented by formula (C2), a hydrogen atom contained in the group represented by formula (C2); L in formula (C) c3 is a group represented by formula (C3), a hydrogen atom contained in the group represented by formula (C3);

[0296] The deuteration rate of the invention compound depends on the deuteration rate of the raw material compound used. Even if a raw material with a certain deuteration rate is used, a certain proportion of naturally occurring light hydrogen isotopes may be contained. Therefore, the deuteration rate of the invention compound includes a ratio that takes into account trace amounts of naturally occurring isotopes, in addition to the ratio that can be calculated by simply counting the number of deuterium atoms represented by the chemical formula. The deuteration rate of the compound of the invention is preferably 1% or more, more preferably 3% or more, even more preferably 5% or more, still more preferably 10% or more, and even more preferably 50% or more.

[0297] The invention compound may be a mixture containing deuterated and non-deuterated compounds, or a mixture of two or more compounds having different deuteration ratios, preferably 1% or more, more preferably 3% or more, even more preferably 5% or more, even more preferably 10% or more, even more preferably 50% or more and less than 100%. Furthermore, the ratio of the number of deuterium atoms to the total number of hydrogen atoms in the compound of the invention is preferably 1% or more, more preferably 3% or more, even more preferably 5% or more, and even more preferably 10% or more and 100% or less.

[0298] When the "substituted or unsubstituted XX group" included in the definition of each formula above is a substituted XX group, the details of the substituent are as described in "Substituents in the case of 'substituted or unsubstituted'", and are preferably an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 ring carbon atoms, or a heterocyclic group (heteroaryl group) having 5 to 13 ring atoms, and more preferably an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 12 ring carbon atoms. The details of each group (alkyl group, aryl group, heterocyclic group) are as described above.

[0299] Those skilled in the art can easily prepare the compounds of the invention by referring to the synthesis examples below and known synthesis methods.

[0300] Specific examples of the compound of the invention are shown below, but the invention is not limited to these exemplary compounds. In the following specific examples, D represents a deuterium atom.

[0301] Exemplary compounds of formula (A) [ka]

[0302]

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[0303]

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[0304]

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[0305]

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[0306]

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[0307]

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[0308]

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[0309]

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[0310]

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[0311]

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[0312]

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[0313]

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[0314]

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[0320]

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[0321]

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[0323]

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[0325]

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[0327]

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[0328]

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[0329]

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[0330]

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[0331]

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[0332]

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[0333]

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[0340]

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[0345]

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[0350]

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[0360]

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[0361]

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[0362]

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[0363]

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[0364]

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[0366]

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[0367]

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[0368]

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[0369]

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[0370]

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[0371]

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[0373]

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[0374]

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[0375]

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[0377]

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[0378]

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[0379]

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[0380]

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[0381]

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[0382]

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[0384]

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[0386]

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[0399] Exemplary compounds of formula (B) [ka]

[0400] [ka]

[0401] [ka]

[0402] [ka]

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[0405] [ka]

[0406] [ka]

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[0408]

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[0413]

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[0421]

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[0426]

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[0427]

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[0458] Exemplary compounds of formula (C) [ka]

[0459] [ka]

[0460] [ka]

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[0477] [ka]

[0478] [ka]

[0479] Materials for organic electroluminescence devices The material for organic EL devices of the present invention contains the compound of the present invention. The content of the compound of the present invention in the material for organic EL devices is 1% by mass or more (including 100%), preferably 10% by mass or more (including 100%), more preferably 50% by mass or more (including 100%), further preferably 80% by mass or more (including 100%), and particularly preferably 90% by mass or more (including 100%). The material for organic EL devices of the present invention is useful for producing organic EL devices.

[0480] Organic EL element The organic EL device of the present invention comprises an anode, a cathode, and an organic layer disposed between the anode and the cathode, the organic layer including a light-emitting layer, and at least one of the organic layers includes a compound of the present invention. Examples of the organic layer containing the compound of the invention include, but are not limited to, a hole transport zone (hole injection layer, hole transport layer, electron blocking layer, exciton blocking layer, etc.) provided between the anode and the light emitting layer, a light emitting layer, a spacer layer, an electron transport zone (electron injection layer, electron transport layer, hole blocking layer, etc.) provided between the cathode and the light emitting layer, etc. The compound of the invention is preferably used as a material for the hole transport zone or light emitting layer of a fluorescent or phosphorescent EL device, more preferably as a material for the hole transport zone, even more preferably as a material for the hole injection layer, hole transport layer, electron blocking layer, or exciton blocking layer, and particularly preferably as a material for the hole injection layer or hole transport layer.

[0481] The organic EL device of the present invention may be a monochromatic light-emitting device of a fluorescent or phosphorescent type, a white light-emitting device of a fluorescent / phosphorescent hybrid type, a simple type having a single light-emitting unit, or a tandem type having multiple light-emitting units, and is preferably a fluorescent type device. Here, the term "light-emitting unit" refers to a minimum unit that includes an organic layer, at least one of which is a light-emitting layer, and emits light by recombination of injected holes and electrons.

[0482] For example, the following device configuration can be given as a representative device configuration of a simple type organic EL device. (1) Anode / light-emitting unit / cathode The light-emitting unit may be a multi-layer type having a plurality of phosphorescent or fluorescent light-emitting layers, in which case a spacer layer may be provided between each light-emitting layer to prevent excitons generated in the phosphorescent light-emitting layer from diffusing to the fluorescent light-emitting layer. A typical layer structure of a simple light-emitting unit is shown below. The layers in parentheses are optional. (a) (hole injection layer / ) hole transport layer / fluorescent light-emitting layer / electron transport layer ( / electron injection layer) (b) (hole injection layer / ) hole transport layer / first fluorescent-emitting layer / second fluorescent-emitting layer / electron transport layer ( / electron injection layer) (c) (hole injection layer / ) hole transport layer / phosphorescent emitting layer / space layer / fluorescent emitting layer / electron transport layer ( / electron injection layer) (d) (hole injection layer / ) hole transport layer / first phosphorescent emitting layer / second phosphorescent emitting layer / space layer / fluorescent emitting layer / electron transport layer ( / electron injection layer) (e) (hole injection layer / ) hole transport layer / phosphorescent emitting layer / space layer / first fluorescent emitting layer / second fluorescent emitting layer / electron transport layer ( / electron injection layer) (f) (hole injection layer / ) hole transport layer / electron blocking layer / fluorescent emitting layer / electron transport layer ( / electron injection layer) (g) (hole injection layer / ) hole transport layer / exciton blocking layer / fluorescent emitting layer / electron transport layer ( / electron injection layer) (h) (hole injection layer / ) first hole transport layer / second hole transport layer / fluorescent light-emitting layer / electron transport layer ( / electron injection layer) (i) (hole injection layer / ) first hole transport layer / second hole transport layer / fluorescent light-emitting layer / first electron transport layer / second electron transport layer ( / electron injection layer) (j) (hole injection layer / ) hole transport layer / fluorescent light-emitting layer / hole blocking layer / electron transport layer ( / electron injection layer) (k) (hole injection layer / ) hole transport layer / fluorescent emitting layer / exciton blocking layer / electron transport layer ( / electron injection layer) (l) (hole injection layer / ) first hole transport layer / second hole transport layer / first fluorescent emitting layer / second fluorescent emitting layer / first electron transport layer / second electron transport layer ( / electron injection layer) (m) (hole injection layer / ) first hole transport layer / second hole transport layer / third hole transport layer / first fluorescent emitting layer / second fluorescent emitting layer / first electron transport layer / second electron transport layer ( / electron injection layer) (n) (hole injection layer / ) first hole transport layer / second hole transport layer / third hole transport layer / fluorescent light-emitting layer / first electron transport layer / second electron transport layer ( / electron injection layer)

[0483] The phosphorescent or fluorescent emitting layers may each emit light of a different color. Specifically, the light emitting unit (f) may have a layer structure such as (hole injection layer / ) hole transport layer / first phosphorescent emitting layer (red light emission) / second phosphorescent emitting layer (green light emission) / space layer / fluorescent emitting layer (blue light emission) / electron transport layer. An electron blocking layer (sometimes referred to as an electron block layer) may be provided between each light-emitting layer and the hole transport layer or the space layer as appropriate. A hole blocking layer may be provided between each light-emitting layer and the electron transport layer as appropriate. By providing an electron blocking layer or a hole blocking layer, electrons or holes can be confined within the light-emitting layer, increasing the probability of charge recombination in the light-emitting layer and improving the light-emitting efficiency. In addition, a hole transport layer adjacent to the light-emitting layer in a multilayer structure including two or more hole transport layers, for example, the second hole transport layer in the two-layer structure or the third hole transport layer in the three-layer structure, may function as an electron blocking layer. In other words, when the hole transport layer is a multilayer structure including two or more hole transport layers, the hole transport layer adjacent to the light-emitting layer in the multilayer structure can also be used as an electron blocking layer.

[0484] Representative device configurations of tandem-type organic EL devices include the following. (2) Anode / first light-emitting unit / intermediate layer / second light-emitting unit / cathode Here, the first light-emitting unit and the second light-emitting unit can be, for example, independently selected from the light-emitting units described above. The intermediate layer is generally also called an intermediate electrode, intermediate conductive layer, charge generating layer, electron extracting layer, connecting layer, or intermediate insulating layer, and can be made of a known material configuration that supplies electrons to the first light-emitting unit and holes to the second light-emitting unit.

[0485] FIG. 1 is a schematic diagram showing an example of the configuration of an organic EL element of the present invention. The organic EL element 1 has a substrate 2, an anode 3, a cathode 4, and an emitting unit 10 disposed between the anode 3 and the cathode 4. The emitting unit 10 has an emitting layer 5. A hole transport zone 6 (hole injection layer, hole transport layer, etc.) is provided between the emitting layer 5 and the anode 3, and an electron transport zone 7 (electron injection layer, electron transport layer, etc.) is provided between the emitting layer 5 and the cathode 4. In addition, an electron blocking layer (not shown) may be provided on the anode 3 side of the emitting layer 5, and a hole blocking layer (not shown) may be provided on the cathode 4 side of the emitting layer 5. This allows electrons and holes to be trapped in the emitting layer 5, thereby further increasing the efficiency of generating excitons in the emitting layer 5.

[0486] 2 is a schematic diagram showing another configuration of the organic EL element of the present invention. The organic EL element 11 has a substrate 2, an anode 3, a cathode 4, and an emitting unit 20 disposed between the anode 3 and the cathode 4. The emitting unit 20 has an emitting layer 5. The hole transport zone disposed between the anode 3 and the emitting layer 5 is formed of a hole injection layer 6a, a first hole transport layer 6b, and a second hole transport layer 6c. The electron transport zone disposed between the emitting layer 5 and the cathode 4 is formed of a first electron transport layer 7a and a second electron transport layer 7b.

[0487] 3 is a schematic diagram showing another configuration of the organic EL element of the present invention. The organic EL element 12 has a substrate 2, an anode 3, a cathode 4, and an emitting unit 30 disposed between the anode 3 and the cathode 4. The emitting unit 30 has an emitting layer 5. The hole transport zone disposed between the anode 3 and the emitting layer 5 is formed of a hole injection layer 6a, a first hole transport layer 6b, a second hole transport layer 6c, and a third hole transport layer 6d. The electron transport zone disposed between the emitting layer 5 and the cathode 4 is formed of a first electron transport layer 7a and a second electron transport layer 7b.

[0488] In the present invention, a host combined with a fluorescent dopant material (fluorescent light-emitting material) is called a fluorescent host, and a host combined with a phosphorescent dopant material is called a phosphorescent host. The fluorescent host and the phosphorescent host are not distinguished only by their molecular structures. That is, the phosphorescent host means a material that forms a phosphorescent light-emitting layer containing a phosphorescent dopant, and does not mean that it cannot be used as a material that forms a fluorescent light-emitting layer. The same applies to the fluorescent host.

[0489] substrate The substrate is used as a support for the organic EL element. For example, a plate such as glass, quartz, or plastic can be used as the substrate. A flexible substrate can also be used. For example, a plastic substrate made of polycarbonate, polyarylate, polyethersulfone, polypropylene, polyester, polyvinyl fluoride, or polyvinyl chloride can be used as the flexible substrate. An inorganic deposition film can also be used.

[0490] anode For the anode formed on the substrate, it is preferable to use a metal, alloy, electrically conductive compound, or a mixture thereof having a large work function (specifically, 4.0 eV or more). Specific examples include indium oxide-tin oxide (ITO), indium oxide-tin oxide containing silicon or silicon oxide, indium oxide-zinc oxide, indium oxide containing tungsten oxide and zinc oxide, and graphene. Other examples include gold (Au), platinum (Pt), nickel (Ni), tungsten (W), chromium (Cr), molybdenum (Mo), iron (Fe), cobalt (Co), copper (Cu), palladium (Pd), titanium (Ti), or nitrides of the above metals (e.g., titanium nitride).

[0491] These materials are usually formed into a film by a sputtering method. For example, indium oxide-zinc oxide can be formed by a sputtering method using a target in which 1 to 10 wt% of zinc oxide is added to indium oxide, and indium oxide containing tungsten oxide and zinc oxide can be formed by a sputtering method using a target in which 0.5 to 5 wt% of tungsten oxide and 0.1 to 1 wt% of zinc oxide are added to indium oxide. In addition, the film may be formed by a vacuum deposition method, a coating method, an inkjet method, a spin coating method, or the like.

[0492] Hole Transport Band As described above, the organic layer may include a hole transport zone between the anode and the light emitting layer. The hole transport zone is composed of a hole injection layer, a hole transport layer, an electron blocking layer, etc. It is preferable that the hole transport zone contains the invention compound. It is preferable that at least one of these layers constituting the hole transport layer contains the invention compound, and it is more preferable that the invention compound is contained in the hole transport layer.

[0493] The hole injection layer formed in contact with the anode is formed using a material that easily injects holes regardless of the work function of the anode, and therefore materials that are commonly used as electrode materials (e.g., metals, alloys, electrically conductive compounds, and mixtures thereof, and elements belonging to Group 1 or Group 2 of the periodic table) can be used. Materials with small work functions, such as elements belonging to Group 1 or 2 of the periodic table, i.e., alkali metals such as lithium (Li) and cesium (Cs), alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr), and alloys containing these (e.g., MgAg, AlLi), rare earth metals such as europium (Eu), ytterbium (Yb), and alloys containing these, can also be used. When alkali metals, alkaline earth metals, and alloys containing these are used to form the anode, vacuum deposition and sputtering methods can be used. Furthermore, when silver paste or the like is used, coating and inkjet methods can be used.

[0494] Hole injection layer The hole injection layer is a layer containing a material with high hole injection properties (hole injection material) and is formed between the anode and the light emitting layer, or, if present, between the hole transport layer and the anode.

[0495] Examples of hole-injecting materials that can be used other than the compound of the present invention include molybdenum oxide, titanium oxide, vanadium oxide, rhenium oxide, ruthenium oxide, chromium oxide, zirconium oxide, hafnium oxide, tantalum oxide, silver oxide, tungsten oxide, and manganese oxide.

[0496] The small organic compounds 4,4',4''-tris(N,N-diphenylamino)triphenylamine (abbreviation: TDATA), 4,4',4''-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine (abbreviation: MTDATA), 4,4'-bis[N-(4-diphenylaminophenyl)-N-phenylamino]biphenyl (abbreviation: DPAB), 4,4'-bis(N-{4-[N'-(3-methylphenyl)-N'-phenylamino]phenyl}-N-phenylamino)biphenyl (abbreviation: DNTPD), 1,3,5-tris[N-(4-diphenylaminophenyl)-N-phenylamino]biphenyl (abbreviation: DNTPD), Examples of the hole injection layer material include aromatic amine compounds such as 3-[N-(9-phenylcarbazol-3-yl)-N-phenylamino]benzene (abbreviation: DPA3B), 3-[N-(9-phenylcarbazol-3-yl)-N-phenylamino]-9-phenylcarbazole (abbreviation: PCzPCA1), 3,6-bis[N-(9-phenylcarbazol-3-yl)-N-phenylamino]-9-phenylcarbazole (abbreviation: PCzPCA2), and 3-[N-(1-naphthyl)-N-(9-phenylcarbazol-3-yl)amino]-9-phenylcarbazole (abbreviation: PCzPCN1).

[0497] Polymer compounds (oligomers, dendrimers, polymers, etc.) can also be used. For example, polymer compounds such as poly(N-vinylcarbazole) (abbreviation: PVK), poly(4-vinyltriphenylamine) (abbreviation: PVTPA), poly[N-(4-{N'-[4-(4-diphenylamino)phenyl]phenyl-N'-phenylamino}phenyl)methacrylamide] (abbreviation: PTPDMA), poly[N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)benzidine] (abbreviation: Poly-TPD) can be used. In addition, polymer compounds to which an acid has been added, such as poly(3,4-ethylenedioxythiophene) / poly(styrenesulfonic acid) (PEDOT / PSS) and polyaniline / poly(styrenesulfonic acid) (PAni / PSS), can also be used.

[0498] Furthermore, it is also preferable to use an acceptor material such as a hexaazatriphenylene (HAT) compound represented by the following formula (K).

[0499] [ka]

[0500] (In the above formula, R 221 ~R 226 each independently represents a cyano group, -CONH2, a carboxyl group, or -COOR 227 (R 227 represents an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 20 carbon atoms. 221 and R 222 , R 223 and R 224 , and R 225 and R 226 adjacent two selected from may be bonded to each other to form a group represented by -CO-O-CO-.) R 227 Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a t-butyl group, a cyclopentyl group, and a cyclohexyl group.

[0501] Hole transport layer The hole transport layer is a layer containing a material with high hole transporting properties (hole transporting material) and is formed between the anode and the light emitting layer, or, if present, between the hole injection layer and the light emitting layer. The invention compound may be used in the hole transport layer alone or in combination with the following compounds:

[0502] The hole transport layer may have a single layer structure or a multilayer structure including two or more layers. For example, the hole transport layer may have a two-layer structure including a first hole transport layer (anode side) and a second hole transport layer (cathode side). That is, the hole transport zone may include a first hole transport layer on the anode side and a second hole transport layer on the cathode side. The hole transport layer may also have a three-layer structure including, in order from the anode side, a first hole transport layer, a second hole transport layer, and a third hole transport layer. That is, the third hole transport layer may be disposed between the second hole transport layer and the light-emitting layer. In one embodiment of the present invention, the hole transport layer of the single layer structure is preferably adjacent to the light emitting layer, and the hole transport layer closest to the cathode in the multilayer structure, for example, the second hole transport layer of the two-layer structure or the third hole transport layer of the three-layer structure, is preferably adjacent to the light emitting layer. In another embodiment of the present invention, an electron blocking layer, which will be described later, may be interposed between the hole transport layer and the light emitting layer of the single layer structure, or between the hole transport layer closest to the light emitting layer in the multilayer structure and the light emitting layer. When the hole transport layer has a two-layer structure, at least one of the first hole transport layer and the second hole transport layer contains the compound of the invention, i.e., the compound of the invention is contained only in the first hole transport layer, only in the second hole transport layer, or both in the first hole transport layer and the second hole transport layer. In one embodiment of the present invention, the compound of the invention is preferably contained in the second hole transport layer, i.e., the compound of the invention is preferably contained only in the second hole transport layer, or the compound of the invention is preferably contained in both the first and second hole transport layers. When the hole transport layer has a three-layer structure, at least one of the first to third hole transport layers contains the compound of the invention. That is, the compound of the invention is contained in only one layer selected from the first to third hole transport layers (only the first hole transport layer, only the second hole transport layer, or only the third hole transport layer), only two layers selected from the first to third hole transport layers (only the first hole transport layer and the second hole transport layer, only the first hole transport layer and the third hole transport layer, or only the second hole transport layer and the third hole transport layer), or all layers of the first to third hole transport layers. In one embodiment of the present invention, the compound of the present invention is preferably contained in the third hole transport layer, i.e., the compound of the present invention is preferably contained only in the third hole transport layer, or the compound of the present invention is preferably contained in the third hole transport layer and one or both of the first and second hole transport layers. In one embodiment of the present invention, the invention compound contained in each of the hole transport layers is preferably a protium compound from the viewpoint of production cost. The protium compound is an invention compound in which all hydrogen atoms are protium atoms. Therefore, the present invention includes an organic EL device in which one or both of the first hole transport layer and the second hole transport layer (in the case of a two-layer structure) and at least one of the first to third hole transport layers contain an invention compound substantially consisting of protium compounds. The term "invention compound substantially consisting of protium compounds" means that the content of protium compounds in the total amount of the invention compound is 90 mol % or more, preferably 95 mol % or more, and more preferably 99 mol % or more (each including 100%).

[0503] As the hole transport layer material other than the compound of the present invention, for example, aromatic amine compounds, carbazole derivatives, anthracene derivatives, etc. can be used. Examples of aromatic amine compounds include 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (abbreviation: NPB), N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (abbreviation: TPD), 4-phenyl-4'-(9-phenylfluoren-9-yl)triphenylamine (abbreviation: BAFLP), 4,4'-bis[N-(9,9-dimethylfluoren-2-yl] )-N-phenylamino]biphenyl (abbreviation: DFLDPBi), 4,4',4"-tris(N,N-diphenylamino)triphenylamine (abbreviation: TDATA), 4,4',4"-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine (abbreviation: MTDATA), and 4,4'-bis[N-(spiro-9,9'-bifluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: BSPB). The above compounds are -6 cm 2 / Vs or higher.

[0504] Examples of carbazole derivatives include 4,4'-di(9-carbazolyl)biphenyl (abbreviation: CBP), 9-[4-(9-carbazolyl)phenyl]-10-phenylanthracene (abbreviation: CzPA), and 9-phenyl-3-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole (abbreviation: PCzPA). Examples of anthracene derivatives include 2-t-butyl-9,10-di(2-naphthyl)anthracene (abbreviation: t-BuDNA), 9,10-di(2-naphthyl)anthracene (abbreviation: DNA), and 9,10-diphenylanthracene (abbreviation: DPAnth). Polymer compounds such as poly(N-vinylcarbazole) (abbreviation: PVK) and poly(4-vinyltriphenylamine) (abbreviation: PVTPA) can also be used. However, compounds other than those mentioned above may be used as long as they have a higher hole transporting property than an electron transporting property.

[0505] In the organic EL device of the present invention having a two-layer hole transport layer, the first hole transport layer preferably contains one or more compounds represented by the following formula (11) or formula (12). In the organic EL device of the present invention having a three-layer hole transport layer structure, it is preferable that one or both of the first hole transport layer and the second hole transport layer contain one or more compounds represented by the following formula (11) or (12). In the organic EL device of the present invention having a hole transport layer of an n-layer structure (n is an integer of 4 or more), it is preferable that at least one of the first hole transport layer to the (n-1)th hole transport layer contains one or more compounds represented by the following formula (11) or formula (12).

[0506] [ka] [In the formula (11) and formula (12), L A1 , L B1 , L C1 , L A2 , L B2 , L C2 and L D2 each independently represents a single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, k is 1, 2, 3 or 4; When k is 1, L E2 represents a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, When k is 2, 3, or 4, 2, 3, or 4 L E2 are identical or different from each other, When k is 2, 3, or 4, multiple L E2 are bonded to each other to form a substituted or unsubstituted monocyclic ring, are bonded to each other to form a substituted or unsubstituted fused ring, or are not bonded to each other, L which does not form a single ring and does not form a condensed ring E2represents a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring atoms, A 1 , B 1 , C 1 , A 2 , B 2 , C 2 , and D 2 each independently represents a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms, or -Si(R' 901 )(R' 902 )(R' 903 ) and R' 901 , R' 902 and R' 903 each independently represents a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, R' 901 When multiple R's are present, multiple R's 901 are identical or different from each other, R' 902 When multiple R's are present, multiple R's 902 are identical or different from each other, R' 903 When multiple R's are present, multiple R's 903 are either identical to each other or different.]

[0507] In formula (11) and formula (12), A1, B1, C1, A2, B2, C2, and D2 are preferably each independently selected from a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted carbazolyl group. More preferably, at least one of A1, B1, and C1 in formula (11), and at least one of A2, B2, C2, and D2 in formula (12) are a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, or a substituted or unsubstituted carbazolyl group.

[0508] The fluorenyl group which can be A1, B1, C1, A2, B2, C2, and D2 may have a substituent at the 9-position, for example, a 9,9-dimethylfluorenyl group or a 9,9-diphenylfluorenyl group. In addition, the substituents at the 9-position may form a ring together, for example, a fluorene skeleton or a xanthene skeleton together.

[0509] L A1 , L B1 , L C1 , L A2 , L B2 , L C2 and L D2 are preferably each independently a single bond or a substituted or unsubstituted arylene group having 6 to 12 ring carbon atoms.

[0510] Specific examples of the compounds represented by formula (11) and formula (12) include the following compounds.

[0511] [ka]

[0512] Dopant materials for the light-emitting layer The light-emitting layer is a layer containing a highly light-emitting material (dopant material), and various materials can be used. For example, fluorescent materials and phosphorescent materials can be used as dopant materials. Fluorescent materials are compounds that emit light from a singlet excited state, and phosphorescent materials are compounds that emit light from a triplet excited state. In one embodiment of the organic EL device according to the present invention, the light-emitting layer may be a single layer. In another embodiment of the organic EL device according to the present invention, the light-emitting layer may include a first light-emitting layer and a second light-emitting layer.

[0513] Examples of blue fluorescent materials that can be used in the light-emitting layer include pyrene derivatives, styrylamine derivatives, chrysene derivatives, fluoranthene derivatives, fluorene derivatives, diamine derivatives, triarylamine derivatives, etc. Specific examples include N,N'-bis[4-(9H-carbazol-9-yl)phenyl]-N,N'-diphenylstilbene-4,4'-diamine (abbreviation: YGA2S), 4-(9H-carbazol-9-yl)-4'-(10-phenyl-9-anthryl)triphenylamine (abbreviation: YGAPA), 4-(10-phenyl-9-anthryl)-4'-(9-phenyl-9H-carbazol-3-yl)triphenylamine (abbreviation: PCBAPA), etc.

[0514] As a green fluorescent material that can be used in the light-emitting layer, aromatic amine derivatives and the like can be used. Specifically, N-(9,10-diphenyl-2-anthryl)-N,9-diphenyl-9H-carbazol-3-amine (abbreviation: 2PCAPA), N-[9,10-bis(1,1'-biphenyl-2-yl)-2-anthryl]-N,9-diphenyl-9H-carbazol-3-amine (abbreviation: 2PCABPhA), N-(9,10-diphenyl-2-anthryl)-N,N',N'-triphenyl-1,4-phenylenediamine (abbreviation: 2DPAPA), N-[ 9,10-bis(1,1'-biphenyl-2-yl)-2-anthryl]-N,N',N'-triphenyl-1,4-phenylenediamine (abbreviation: 2DPABPhA), N-[9,10-bis(1,1'-biphenyl-2-yl)]-N-[4-(9H-carbazol-9-yl)phenyl]-N-phenylanthracen-2-amine (abbreviation: 2YGABPhA), N,N,9-triphenylanthracen-9-amine (abbreviation: DPhAPhA), etc.

[0515] Red fluorescent materials that can be used in the light-emitting layer include tetracene derivatives, diamine derivatives, etc. Specific examples include N,N,N',N'-tetrakis(4-methylphenyl)tetracene-5,11-diamine (abbreviation: p-mPhTD), 7,14-diphenyl-N,N,N',N'-tetrakis(4-methylphenyl)acenaphtho[1,2-a]fluoranthene-3,10-diamine (abbreviation: p-mPhAFD), etc.

[0516] In one embodiment of the present invention, the light-emitting layer preferably contains a fluorescent light-emitting material (fluorescent dopant material).

[0517] As blue phosphorescent materials that can be used in the light-emitting layer, metal complexes such as iridium complexes, osmium complexes, and platinum complexes are used.Specific examples include bis[2-(4',6'-difluorophenyl)pyridinato-N,C2']iridium(III) tetrakis(1-pyrazolyl)borate (abbreviation: FIr6), bis[2-(4',6'-difluorophenyl)pyridinato-N,C2']iridium(III) picolinate (abbreviation: FIrpic), bis[2-(3',5'bistrifluoromethylphenyl)pyridinato-N,C2']iridium(III) picolinate (abbreviation: Ir(CF3ppy)2(pic)), and bis[2-(4',6'-difluorophenyl)pyridinato-N,C2']iridium(III) acetylacetonate (abbreviation: FIracac).

[0518] Iridium complexes are used as green phosphorescent materials that can be used in the light-emitting layer, including tris(2-phenylpyridinato-N,C2')iridium(III) (abbreviation: Ir(ppy)3), bis(2-phenylpyridinato-N,C2')iridium(III) acetylacetonate (abbreviation: Ir(ppy)2(acac)), bis(1,2-diphenyl-1H-benzimidazolato)iridium(III) acetylacetonate (abbreviation: Ir(pbi)2(acac)), and bis(benzo[h]quinolinato)iridium(III) acetylacetonate (abbreviation: Ir(bzq)2(acac)).

[0519] As red phosphorescent light-emitting materials that can be used in the light-emitting layer, metal complexes such as iridium complexes, platinum complexes, terbium complexes, and europium complexes are used. Specific examples of the organic metal complex include bis[2-(2'-benzo[4,5-α]thienyl)pyridinato-N,C3']iridium(III) acetylacetonate (abbreviation: Ir(btp)2(acac)), bis(1-phenylisoquinolinato-N,C2')iridium(III) acetylacetonate (abbreviation: Ir(piq)2(acac)), (acetylacetonato)bis[2,3-bis(4-fluorophenyl)quinoxalinato]iridium(III) (abbreviation: Ir(Fdpq)2(acac)), and 2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphyrin platinum(II) (abbreviation: PtOEP).

[0520] In addition, rare earth metal complexes such as tris(acetylacetonato)(monophenanthroline)terbium(III) (abbreviation: Tb(acac)3(Phen)), tris(1,3-diphenyl-1,3-propanedionato)(monophenanthroline)europium(III) (abbreviation: Eu(DBM)3(Phen)), and tris[1-(2-thenoyl)-3,3,3-trifluoroacetonato](monophenanthroline)europium(III) (abbreviation: Eu(TTA)3(Phen)) can be used as phosphorescent materials because they emit light from rare earth metal ions (electron transition between different multiplicities).

[0521] Host material for the emissive layer The light-emitting layer may be configured by dispersing the above-mentioned dopant material in another material (host material). It is preferable to use a material having a lower lowest unoccupied molecular orbital (LUMO) level and a lower highest occupied molecular orbital (HOMO) level than the dopant material.

[0522] Examples of the host material include (1) Metal complexes such as aluminum complexes, beryllium complexes, or zinc complexes, (2) Heterocyclic compounds such as oxadiazole derivatives, benzimidazole derivatives, or phenanthroline derivatives, (3) Condensed aromatic compounds such as carbazole derivatives, anthracene derivatives, phenanthrene derivatives, pyrene derivatives, and chrysene derivatives; (4) An aromatic amine compound such as a triarylamine derivative or a condensed polycyclic aromatic amine derivative is used.

[0523] For example, metal complexes such as tris(8-quinolinolato)aluminum(III) (abbreviation: Alq), tris(4-methyl-8-quinolinolato)aluminum(III) (abbreviation: Almq3), bis(10-hydroxybenzo[h]quinolinato)beryllium(II) (abbreviation: BeBq2), bis(2-methyl-8-quinolinolato)(4-phenylphenolato)aluminum(III) (abbreviation: BAlq), bis(8-quinolinolato)zinc(II) (abbreviation: Znq), bis[2-(2-benzoxazolyl)phenolato]zinc(II) (abbreviation: ZnPBO), and bis[2-(2-benzothiazolyl)phenolato]zinc(II) (abbreviation: ZnBTZ); Heterocyclic compounds such as 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (abbreviation: PBD), 1,3-bis[5-(p-tert-butylphenyl)-1,3,4-oxadiazol-2-yl]benzene (abbreviation: OXD-7), 3-(4-biphenylyl)-4-phenyl-5-(4-tert-butylphenyl)-1,2,4-triazole (abbreviation: TAZ), 2,2',2''-(1,3,5-benzenetriyl)tris(1-phenyl-1H-benzimidazole) (abbreviation: TPBI), bathophenanthroline (abbreviation: BPhen), and bathocuproine (abbreviation: BCP); 9-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole (abbreviation: CzPA), 3,6-diphenyl-9-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole (abbreviation: DPCzPA), 9,10-bis(3,5-diphenylphenyl)anthracene (abbreviation: DPPA), 9,10-di(2-naphthyl)anthracene (abbreviation: DNA), 2-tert-butyl-9,10-di(2-naphthyl)anthracene (abbreviation: t-Bu condensed aromatic compounds such as DNA), 9,9'-bianthryl (abbreviation: BANT), 9,9'-(stilbene-3,3'-diyl)diphenanthrene (abbreviation: DPNS), 9,9'-(stilbene-4,4'-diyl)diphenanthrene (abbreviation: DPNS2), 3,3',3''-(benzene-1,3,5-triyl)tripylene (abbreviation: TPB3), 9,10-diphenylanthracene (abbreviation: DPAnth), and 6,12-dimethoxy-5,11-diphenylchrysene; and N,N-diphenyl-9-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazol-3-amine (abbreviation: CzA1PA), 4-(10-phenyl-9-anthryl)triphenylamine (abbreviation: DPhPA), N,9-diphenyl-N-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazol-3-amine (abbreviation: PCAPA), N,9-diphenyl-N-{4-[4-(10-phenyl-9-anthryl)phenyl]phenyl}-9H-carbazol-3-amine (abbreviation: PCAPBA), N-(9,10-diphenyl-2-anthryl)-N,9-diphenyl-9H Aromatic amine compounds such as -carbazole-3-amine (abbreviation: 2PCAPA), 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (abbreviation: NPB or α-NPD), N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (abbreviation: TPD), 4,4'-bis[N-(9,9-dimethylfluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: DFLDPBi), and 4,4'-bis[N-(spiro-9,9'-bifluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: BSPB) can be used. Multiple host materials may be used.

[0524] In particular, in the case of a blue fluorescent element, it is preferable to use the following anthracene compound as the host material.

[0525] [ka]

[0526] [ka]

[0527] [ka]

[0528] In one embodiment of the organic EL device according to the present invention, when the light-emitting layer includes a first light-emitting layer and a second light-emitting layer, at least one of the components constituting the first light-emitting layer is different from the components constituting the second light-emitting layer, for example, a dopant material contained in the first light-emitting layer is different from a dopant material contained in the second light-emitting layer, or a host material contained in the first light-emitting layer is different from a host material contained in the second light-emitting layer.

[0529] In the organic EL device of the present invention, the light-emitting layer may contain a light-emitting compound that exhibits fluorescent emission having a main peak wavelength of 500 nm or less (hereinafter, sometimes simply referred to as a "fluorescent compound").

[0530] The method for measuring the main peak wavelength of a compound is as follows. A 5 μmol / L toluene solution of the compound to be measured is prepared and placed in a quartz cell, and the emission spectrum (vertical axis: emission intensity, horizontal axis: wavelength) of this sample is measured at room temperature (300 K). The emission spectrum can be measured using a spectrofluorophotometer (device name: F-7000) manufactured by Hitachi High-Tech Science Corporation. Note that the emission spectrum measuring device is not limited to the device used here. In the emission spectrum, the peak wavelength at which the emission intensity is maximum is defined as the main peak wavelength. Note that in this specification, the main peak wavelength may be referred to as the fluorescent emission main peak wavelength (FL-peak).

[0531] The fluorescent compound may be the dopant material or the host material.

[0532] When the light-emitting layer is a single layer, only one of the dopant material and the host material may be the fluorescent compound, or both of them may be the fluorescent compound. In addition, when the light-emitting layer includes a first light-emitting layer (anode side) and a second light-emitting layer (cathode side), only one of the first light-emitting layer and the second light-emitting layer may contain the fluorescent compound, or both of the light-emitting layers may contain the fluorescent compound. When the first light-emitting layer includes the fluorescent compound, only one of the dopant material and the host material included in the first light-emitting layer may be the fluorescent compound, or both of them may be the fluorescent compound. In addition, when the second light-emitting layer includes the fluorescent compound, only one of the dopant material and the host material included in the second light-emitting layer may be the fluorescent compound, or both of them may be the fluorescent compound.

[0533] Electron Transport Zone The electron transporting zone is composed of an electron injection layer, an electron transporting layer, a hole blocking layer, etc. Any layer of the electron transporting zone, particularly the electron transporting layer, preferably contains one or more selected from the group consisting of an alkali metal, an alkaline earth metal, a rare earth metal, an oxide of an alkali metal, a halide of an alkali metal, an oxide of an alkaline earth metal, a halide of an alkaline earth metal, an oxide of a rare earth metal, a halide of a rare earth metal, an organic complex containing an alkali metal, an organic complex containing an alkaline earth metal, and an organic complex containing a rare earth metal.

[0534] electron transport layer The electron transport layer is a layer containing a material with high electron transporting properties (electron transporting material), and is formed between the light emitting layer and the cathode, or, if present, between the electron injection layer and the light emitting layer. The electron transport layer may have a single-layer structure or a multi-layer structure including two or more layers. For example, the electron transport layer may have a two-layer structure including a first electron transport layer (anode side) and a second electron transport layer (cathode side). In one embodiment of the present invention, the electron transport layer of the single-layer structure is preferably adjacent to the light-emitting layer, and the electron transport layer closest to the anode in the multi-layer structure, for example, the first electron transport layer of the two-layer structure, is preferably adjacent to the light-emitting layer. In another embodiment of the present invention, a hole blocking layer, which will be described later, may be interposed between the electron transport layer and the light-emitting layer of the single-layer structure, or between the electron transport layer closest to the light-emitting layer and the light-emitting layer in the multi-layer structure.

[0535] The electron transport layer may contain, for example, (1) Metal complexes such as aluminum complexes, beryllium complexes, and zinc complexes, (2) Heteroaromatic compounds such as imidazole derivatives, benzimidazole derivatives, azine derivatives, carbazole derivatives, and phenanthroline derivatives; (3) Polymer compounds can be used.

[0536] Examples of metal complexes include tris(8-quinolinolato)aluminum(III) (abbreviation: Alq), tris(4-methyl-8-quinolinolato)aluminum (abbreviation: Almq3), bis(10-hydroxybenzo[h]quinolinato)beryllium (abbreviation: BeBq2), bis(2-methyl-8-quinolinolato)(4-phenylphenolato)aluminum(III) (abbreviation: BAlq), bis(8-quinolinolato)zinc(II) (abbreviation: Znq), bis[2-(2-benzoxazolyl)phenolato]zinc(II) (abbreviation: ZnPBO), and bis[2-(2-benzothiazolyl)phenolato]zinc(II) (abbreviation: ZnBTZ).

[0537] Examples of heteroaromatic compounds include 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (abbreviation: PBD), 1,3-bis[5-(ptert-butylphenyl)-1,3,4-oxadiazol-2-yl]benzene (abbreviation: OXD-7), 3-(4-tert-butylphenyl)-4-phenyl-5-(4-biphenylyl)-1,2,4-triazole (abbreviation: TAZ), 3-(4-tert-butylphenyl)-4-(4-ethylphenyl)-5-(4-biphenylyl)-1,2,4-triazole (abbreviation: p-EtTAZ), bathophenanthroline (abbreviation: BPhen), bathocuproine (abbreviation: BCP), and 4,4'-bis(5-methylbenzoxazol-2-yl)stilbene (abbreviation: BzOs).

[0538] Examples of polymer compounds include poly[(9,9-dihexylfluorene-2,7-diyl)-co-(pyridine-3,5-diyl)] (abbreviation: PF-Py) and poly[(9,9-dioctylfluorene-2,7-diyl)-co-(2,2'-bipyridine-6,6'-diyl)] (abbreviation: PF-BPy).

[0539] The above materials are 10 -6 cm 2 A material having an electron mobility of 1 / Vs or more. Note that materials other than those mentioned above may be used for the electron transport layer as long as they have a higher electron transporting property than a hole transporting property.

[0540] electron injection layer The electron injection layer is a layer containing a material with high electron injection properties. For the electron injection layer, alkali metals such as lithium (Li) and cesium (Cs), alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr), rare earth metals such as europium (Eu) and ytterbium (Yb), and compounds containing these metals can be used. Examples of such compounds include alkali metal oxides, alkali metal halides, alkali metal-containing organic complexes, alkaline earth metal oxides, alkaline earth metal halides, alkaline earth metal-containing organic complexes, rare earth metal oxides, rare earth metal halides, and rare earth metal-containing organic complexes. In addition, a mixture of a plurality of these compounds can be used. In addition, materials having electron transport properties containing alkali metals, alkaline earth metals, or compounds thereof, specifically, materials containing magnesium (Mg) in Alq, etc., may be used. In this case, electron injection from the cathode can be performed more efficiently. Alternatively, a composite material obtained by mixing an organic compound and an electron donor (donor) may be used for the electron injection layer. Such a composite material has excellent electron injection and transport properties because the organic compound receives electrons from the electron donor. In this case, the organic compound is preferably a material that is excellent in transporting the received electrons, and specifically, for example, the above-mentioned materials constituting the electron transport layer (metal complexes, heteroaromatic compounds, etc.) can be used. The electron donor may be any material that exhibits electron donating properties to the organic compound. Specifically, alkali metals, alkaline earth metals, and rare earth metals are preferred, and examples of such materials include lithium, cesium, magnesium, calcium, erbium, and ytterbium. Furthermore, alkali metal oxides and alkaline earth metal oxides are preferred, and examples of such materials include lithium oxide, calcium oxide, and barium oxide. Furthermore, a Lewis base such as magnesium oxide can also be used. Furthermore, an organic compound such as tetrathiafulvalene (abbreviation: TTF) can also be used.

[0541] cathode For the cathode, it is preferable to use a metal, alloy, electrically conductive compound, or a mixture thereof, each having a small work function (specifically, 3.8 eV or less). Specific examples of such a cathode material include elements belonging to Group 1 or 2 of the periodic table, i.e., alkali metals such as lithium (Li) and cesium (Cs), alkaline earth metals such as magnesium (Mg), calcium (Ca), and strontium (Sr), and alloys containing these (e.g., MgAg, AlLi), rare earth metals such as europium (Eu), ytterbium (Yb), and alloys containing these. When an alkali metal, an alkaline earth metal, or an alloy containing these is used to form a cathode, a vacuum deposition method or a sputtering method can be used. When a silver paste or the like is used, a coating method or an inkjet method can be used. By providing an electron injection layer, the cathode can be formed using various conductive materials, such as Al, Ag, ITO, graphene, indium oxide-tin oxide containing silicon or silicon oxide, regardless of the magnitude of the work function. These conductive materials can be formed into films by a sputtering method, an inkjet method, a spin coating method, or the like.

[0542] Insulation layer In organic EL devices, pixel defects due to leakage and short circuits are likely to occur because an electric field is applied to an ultra-thin film. To prevent this, an insulating layer made of an insulating thin film may be inserted between a pair of electrodes. Examples of materials used for the insulating layer include aluminum oxide, lithium fluoride, lithium oxide, cesium fluoride, cesium oxide, magnesium oxide, magnesium fluoride, calcium oxide, calcium fluoride, aluminum nitride, titanium oxide, silicon oxide, germanium oxide, silicon nitride, boron nitride, molybdenum oxide, ruthenium oxide, vanadium oxide, etc. Mixtures or laminates of these materials may also be used.

[0543] Space Layer The spacer layer is a layer provided between a fluorescent light-emitting layer and a phosphorescent light-emitting layer for the purpose of preventing excitons generated in the phosphorescent light-emitting layer from diffusing into the fluorescent light-emitting layer or for the purpose of adjusting the carrier balance when the fluorescent light-emitting layer and the phosphorescent light-emitting layer are laminated, for example. The spacer layer can also be provided between a plurality of phosphorescent light-emitting layers. Since the spacer layer is provided between the light-emitting layers, it is preferable that the spacer layer is made of a material having both electron transport properties and hole transport properties. In addition, in order to prevent the diffusion of triplet energy in the adjacent phosphorescent light-emitting layer, it is preferable that the triplet energy is 2.6 eV or more. Materials used for the spacer layer include the same materials as those used for the hole transport layer described above.

[0544] blocking layer A blocking layer such as an electron blocking layer, a hole blocking layer, or an exciton blocking layer may be provided adjacent to the light-emitting layer. The electron blocking layer is a layer that prevents electrons from leaking from the light-emitting layer to the hole transport layer, and the hole blocking layer is a layer that prevents holes from leaking from the light-emitting layer to the electron transport layer. The exciton blocking layer has the function of preventing excitons generated in the light-emitting layer from diffusing to surrounding layers and trapping the excitons within the light-emitting layer.

[0545] Each layer of the organic EL element can be formed by a conventionally known deposition method, coating method, etc. For example, the layers can be formed by a conventionally known deposition method such as vacuum deposition method or molecular beam deposition method (MBE method), or a coating method such as dipping method, spin coating method, casting method, bar coating method, or roll coating method using a solution of a compound that forms the layer.

[0546] The thickness of each layer is not particularly limited, but generally, if the thickness is too thin, defects such as pinholes are likely to occur, while if the thickness is too thick, a high driving voltage is required, resulting in poor efficiency. Therefore, the thickness is usually 5 nm to 10 μm, and more preferably 10 nm to 0.2 μm.

[0547] In the organic EL device of the present invention having a hole transport layer of a two-layer structure or a three-layer structure, the total thickness of the first hole transport layer and the second hole transport layer is preferably 30 nm or more and 150 nm or less, more preferably 40 nm or more and 130 nm or less. In one embodiment of the present invention, the thickness of the second hole transport layer of the two-layer structure or three-layer structure is preferably 5 nm or more, more preferably 20 nm or more, even more preferably 25 nm or more, particularly preferably 35 nm or more, and is preferably 100 nm or less. In one embodiment of the present invention, the thickness of the hole transport layer adjacent to the light-emitting layer is preferably 5 nm or more, more preferably 20 nm or more, even more preferably 25 nm or more, particularly preferably 30 nm or more, and is preferably 100 nm or less. In addition, in the organic EL device having the hole transport layer with a two-layer structure or a three-layer structure of the present invention, the ratio of the film thickness D2 of the second hole transport layer to the film thickness D1 of the first hole transport layer is preferably 0.3 < D2 / D1 < 4.0, more preferably 0.5 < D2 / D1 < 3.5, and even more preferably 0.75 < D2 / D1 < 3.0.

[0548] Preferable embodiments of the organic EL device of the present invention include, for example, (1) An organic EL device having a hole transport layer with a two-layer structure · A first embodiment in which the second hole transport layer contains the inventive compound and the first hole transport layer does not contain the inventive compound; · A second embodiment in which both the first hole transport layer and the second hole transport layer contain the inventive compound; · A third embodiment in which the first hole transport layer contains the inventive compound and the second hole transport layer does not contain the inventive compound; (2) An organic EL device having a hole transport layer with a three-layer structure · A fourth embodiment in which the first hole transport layer contains the inventive compound and the second and third hole transport layers do not contain the inventive compound; · A fifth embodiment in which the second hole transport layer contains the inventive compound and the first and third hole transport layers do not contain the inventive compound; · A sixth embodiment in which the third hole transport layer contains the inventive compound and the first and second hole transport layers do not contain the inventive compound; · A seventh embodiment in which the first and second hole transport layers contain the inventive compound and the third hole transport layer does not contain the inventive compound; · An eighth embodiment in which the first and third hole transport layers contain the inventive compound and the second hole transport layer does not contain the inventive compound; · A tenth embodiment in which the second and third hole transport layers contain the inventive compound and the first hole transport layer does not contain the inventive compound; · A tenth embodiment in which all of the first to third hole transport layers contain the inventive compound; and the like.

[0549] Electronic device The organic EL element according to one embodiment of the present invention can be used in electronic devices such as display devices and light-emitting devices. Examples of the display devices include display components such as organic EL panel modules, televisions, mobile phones, tablets, and personal computers. Examples of the light-emitting devices include lighting and vehicle lamps.

[0550] The organic EL element can be used in display components such as organic EL panel modules, display devices for televisions, mobile phones, personal computers, and electronic devices such as light-emitting devices for lighting and vehicle lamps. EXAMPLES

[0551] The present invention will be described in more detail below using examples, but the present invention is not limited to the following examples.

[0552] Invention compound used in the production of the organic EL device (I) of Example 1 [ka]

[0553] Comparative compounds used in the manufacture of the organic EL device (I) of Comparative Example 1 [ka]

[0554] Other compounds used in the manufacture of the organic EL devices (I) of Example 1 and Comparative Example 1 [ka]

[0555] Fabrication of organic EL element (I) Example 1 A 25 mm x 75 mm x 1.1 mm glass substrate with an ITO transparent electrode (anode) (manufactured by Geomatec Co., Ltd.) was ultrasonically cleaned in isopropyl alcohol for 5 minutes, and then UV ozone cleaned for 30 minutes. The ITO film thickness was 130 nm. The glass substrate with the ITO transparent electrode after cleaning was attached to the substrate holder of the vacuum deposition apparatus, and the compound HT-1 and the compound HA were co-deposited on the surface on which the transparent electrode was formed so as to cover the transparent electrode, thereby forming a hole injection layer with a thickness of 10 nm. The mass ratio of the compound HT-1 to the compound HA (HT-1:HA) was 97:3. Next, the compound HT-1 was deposited on the hole injection layer to form a first hole transport layer having a thickness of 80 nm. Next, compound Inv-1 was deposited on the first hole transport layer to form a second hole transport layer having a thickness of 10 nm. Next, on the second hole transport layer, compound BH-1 (host material) and compound BD-1 (dopant material) were co-deposited to form a light-emitting layer having a thickness of 25 nm. The mass ratio of compound BH-1 to compound BD-1 (BH-1:BD-1) was 96:4. Next, the compound ET-1 was evaporated on this light-emitting layer to form a first electron transport layer having a thickness of 10 nm. Next, the compound ET-2 was deposited on the first electron transport layer to form a second electron transport layer having a thickness of 15 nm. Next, LiF was evaporated onto the second electron transport layer to form an electron injecting electrode having a thickness of 1 nm. Then, metallic Al was evaporated onto this electron injecting electrode to form a metal cathode having a thickness of 50 nm. The layer structure of the organic EL element thus obtained is shown below. ITO(130) / HT-1:HA=97:3(10) / HT-1(80) / Compound Inv-1(10) / BH-1:BD-1=96:4(25) / ET-1(10) / ET-2(15) / LiF(1) / Al(50) In the above layer structure, the numbers in parentheses indicate film thicknesses (nm) and the ratios are mass ratios.

[0556] Comparative Example 1 An organic EL device was prepared in the same manner as in Example 1, except that the comparative compound Ref-1 was used instead of the compound Inv-1.

[0557] External quantum efficiency (EQE) measurements The obtained organic EL device (I) was heated at room temperature with a current density of 10 mA / cm 2 The device was driven with a constant DC current of 1000 V. The luminance was measured using a luminance meter (Spectroradiometer CS-1000 manufactured by Minolta Co., Ltd.), and the external quantum efficiency (%) was calculated from the results. The results are shown in Table 1.

[0558] [Table 1]

[0559] As is clear from the results in Table 1, the organic EL device (I) containing the inventive compound (compound Inv-1) has a higher external quantum efficiency than the organic EL device (I) containing the comparative compound Ref-1.

[0560] Invention compounds used in the production of organic EL devices (II) in Examples 2 to 4 [ka]

[0561] Comparative compounds used in the manufacture of the organic EL device (II) of Comparative Example 2 [ka]

[0562] Other compounds used in the manufacture of the organic EL devices (II) of Examples 2 to 4 and Comparative Example 2 [ka]

[0563] Fabrication of organic EL element (II) Example 2 A 25 mm x 75 mm x 1.1 mm glass substrate with an ITO transparent electrode (anode) (manufactured by Geomatec Co., Ltd.) was ultrasonically cleaned in isopropyl alcohol for 5 minutes, and then UV ozone cleaned for 30 minutes. The ITO film thickness was 130 nm. The glass substrate with the ITO transparent electrode after cleaning was attached to the substrate holder of the vacuum deposition apparatus, and the compound HT-2 and the compound HA were co-deposited on the surface on which the transparent electrode was formed so as to cover the transparent electrode, thereby forming a hole injection layer with a thickness of 10 nm. The mass ratio of the compound HT-2 to the compound HA (HT-2:HA) was 97:3. Next, the compound HT-2 was deposited on the hole injection layer to form a first hole transport layer having a thickness of 85 nm. Next, the compound Inv-2 was deposited on the first hole transport layer to form a second hole transport layer having a thickness of 5 nm. Next, on the second hole transport layer, compound BH-2 (host material) and compound BD-2 (dopant material) were co-deposited to form a light-emitting layer having a thickness of 20 nm. The mass ratio of compound BH-2 to compound BD-2 (BH-2:BD-2) was 99:1. Next, the compound ET-3 was evaporated on this light-emitting layer to form a first electron transport layer having a thickness of 5 nm. Next, the compound ET-4 and Liq were co-deposited on the first electron transport layer to form a second electron transport layer having a thickness of 31 nm. The mass ratio of the compound ET-4 to Liq (ET-4:Liq) was 50:50. Next, Liq was evaporated onto the second electron transport layer to form an electron injecting electrode having a thickness of 1 nm. Then, metallic Al was evaporated onto this electron injecting electrode to form a metal cathode with a thickness of 80 nm. The layer structure of the organic EL element thus obtained is shown below. ITO(130) / HT-2:HA=97:3(10) / HT-2(85) / Compound Inv-2(5) / BH-2:BD-2=99:1(20) / ET-3(5) / ET-4:Liq=50:50(31) / Liq(1) / Al(80) In the above layer structure, the numbers in parentheses indicate film thicknesses (nm) and the ratios are mass ratios.

[0564] Examples 3 and 4, and Comparative Example 2 An organic EL device was prepared in the same manner as in Example 2, except that a compound shown in Table 2 was used as the second hole transport layer material instead of compound Inv-2.

[0565] Measurement of element life (LT95) The obtained organic EL device (II) was exposed to a current density of 50 mA / cm 2 The time until the brightness decreased to 95% of the initial brightness was measured, and this was taken as the 95% life span (LT95). The results are shown in Table 2.

[0566] [Table 2]

[0567] As is clear from the results in Table 2, the organic EL device (II) containing the inventive compounds (compounds Inv-2 to Inv-4) has a longer lifetime than the organic EL device (II) containing the comparative compound Ref-2.

[0568] Invention compounds synthesized in the synthesis examples [ka]

[0569] Intermediate synthesis example 1: Synthesis of intermediate A-1 [ka]

[0570] Under an argon atmosphere, a mixture of 3.09g (10.0mmol) of 2'-bromo-1,1':4',1''-terphenyl (raw material 1), 2.32g (10.0mmol) of 4'-chloro(1,1'-biphenyl)-3-ylboronic acid (raw material 2), 0.163g (0.2mmol) of [1,1'-bis(diphenylphosphino)ferrocene]palladium(II) dichloride dichloromethane adduct, 12.5mL of 2M aqueous sodium carbonate solution, and 300mL of DME (1,2-dimethoxyethane) was refluxed at the boiling point for 7 hours. The reaction solution was cooled to room temperature and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography to obtain 3.53g of a white solid. The yield was 85%.

[0571] Intermediate Synthesis Examples 2 and 3: Synthesis of Intermediates A-2 and A-3 Intermediates A-2 and A-3 were obtained in the same manner as in Intermediate Synthesis Example 1, except that raw materials 1 and 2 were replaced with those shown in Table 3. The yields of Intermediates A-2 and A-3 are shown in Table 3.

[0572] [Table 3]

[0573] Intermediate Synthesis Example 4: Synthesis of Intermediate B-1 [ka]

[0574] Under an argon atmosphere, a mixture of 8.50g (30.0mmol) of 2-(4-bromophenyl)naphthalene (raw material 3), 5.08g (30.0mmol) of 2-aminobiphenyl (raw material 4), 0.549g (0.6mmol) of tris(dibenzylideneacetone)dipalladium(0), 0.747g (1.2mmol) of BINAP, 4.03g (42mmol) of sodium-t-butoxide, and 200mL of toluene was refluxed at the boiling point for 7 hours. The reaction solution was cooled to room temperature and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography to obtain 8.92g of a white solid. The yield was 80%.

[0575] Intermediate Synthesis Examples 5 and 6: Synthesis of Intermediates B-2 and B-3 Intermediate B-2 and B-3 were obtained in the same manner as in Intermediate Synthesis Example 4, except that raw materials 3 and 4 were replaced with those shown in Table 4. The yields of Intermediate B-2 and B-3 are shown in Table 4.

[0576] [Table 4]

[0577] Synthesis Example 1: Synthesis of Compound Inv-1 [ka]

[0578] Under an argon atmosphere, a mixture of 3.15g (10.0mmol) of intermediate A-2 (intermediate 1), 4.12g (10.0mmol) of intermediate B-3 (intermediate 2), 0.183g (0.2mmol) of tris(dibenzylideneacetone)dipalladium(0), 0.232g (0.8mmol) of tri-tert-butylphosphonium tetrafluoroborate, 1.35g (14.0mmol) of sodium-t-butoxide, and 67mL of xylene was stirred at 110°C for 7 hours. The reaction solution was cooled to room temperature and then concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography and recrystallization to obtain 5.59g of a white solid. The yield was 73%. Mass spectrometry revealed that the product was compound Inv-1, with an m / e of 766 for a molecular weight of 765.96.

[0579] Synthesis Examples 2 to 4: Synthesis of invention compounds Inv-2 to Inv-4 Invention compounds Inv-2 to Inv-4 were obtained in the same manner as in Synthesis Example 1, except that Intermediate 1 (Intermediate A-2) and 2 (Intermediate B-3) were replaced with those shown in Table 5. The yields of invention compounds Inv-2 to Inv-4 are shown in Table 5.

[0580] [Table 5] [Explanation of symbols]

[0581] 1, 11, 12 Organic EL element 2. Board 3 Anode 4 cathode 5. Light-emitting layer 5a First light-emitting layer 5b Second light-emitting layer 6 Hole transport zone (hole transport layer) 6a Hole injection layer 6b First hole transport layer 6c Second hole transport layer 6d Third hole transport layer 7 Electron transport zone (electron transport layer) 7a First electron transport layer 7b Second electron transport layer 10, 20, 30 Light Units

Claims

1. A compound represented by the following formula (A). 【Chemistry 1】 (In formula (A), N ＊ It is the central nitrogen atom. Ar ａ１ This is a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30 ring-forming atoms. Ar ａ２ This is a group represented by the following formula (A1). 【Chemistry 2】 (In formula (A1), *1 is L ａ２ This is the binding position to [the target]. A and B independently represent a substituted or unsubstituted benzene ring, a substituted or unsubstituted naphthalene ring, or a substituted or unsubstituted phenanthrene ring. One of A and B is selected and joins *2 via a single bond. L ａ１ to L ａ３ each independently represents a single bond, a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted divalent heterocyclic group having 5 to 30 ring-forming atoms. R ａ１ ~R ａ１３ each independently represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 ring-forming carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 50 ring-forming atoms, a substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a group represented by -Si(R ９０１ )(R ９０２ )(R ９０３ ), a group represented by -O-(R ９０４ ), or a group represented by -S-(R ９０５ ), R ９０１ ~R ９０５ Each of these is independently a hydrogen atom, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted ring-forming C6-C50 aryl group, or a substituted or unsubstituted ring-forming C5-C50 heterocyclic group. R ９０１ If there are two or more of them, then there are two or more R ９０１ They are either identical or different from each other. R ９０２ If there are two or more of them, then there are two or more R ９０２ They are either identical or different from each other. R ９０３ If there are two or more of them, then there are two or more R ９０３ They are either identical or different from each other. R ９０４ If there are two or more of them, then there are two or more R ９０４ They are either identical or different from each other. R ９０５ If there are two or more of them, then there are two or more R ９０５ They are either identical or different from one another. X ａ１ This is either an oxygen atom or a sulfur atom. However, L ａ２ and L ａ３ is an unsubstituted p-phenylene group, and formula (A1) is the following formula (A1-1), R ａ１２４ and R ａ１２５ When one of them is selected is a single bond that joins to *8, -L ａ１ -Ar ａ１ This is, excluding the unsubstituted p-biphenyl group, L ａ３ It is a single bond, L ａ２ When is an unsubstituted o-phenylene group and formula (A1) is the following formula (A1-2-1), R ａ１３１ ~R ａ１３３ , and R ａ１３５ ~R ａ１４０ One of the options selected is a single bond that connects to *10. 【Transformation 3】 (In formula (A1-1-1), *3 is L ａ２ This is the binding position to, R ａ１２１ ~R ａ１２８ One of the selected R is a single bond that joins *8, and is not a single bond that joins *8. ａ１２１ ~R ａ１２８ This is a hydrogen atom. In formula (A1-2-1), *5 is L ａ２ This is the binding position to, R ａ１３１ ~R ａ１４０ One of the selected R is a single bond that joins *10, and is not a single bond that joins *10. ａ１３１ ~R ａ１４０ It is a hydrogen atom.

2. L ａ３ The compound according to claim 1, wherein is a single bond, or a substituted or unsubstituted ring-forming arylene group having 6 to 30 carbon atoms.

3. L ａ３ The compound according to claim 1 or 2, wherein is a single bond, or a substituted or unsubstituted ring-forming arylene group having 6 to 12 carbon atoms.

4. L ａ３ The compound according to claim 1 or 2, wherein is a substituted or unsubstituted phenylene group.

5. L ａ２ The compound according to claim 1 or 2, wherein is a single bond, or a substituted or unsubstituted ring-forming arylene group having 6 to 30 carbon atoms.

6. L ａ２ The compound according to claim 1 or 2, wherein is a single bond, or a substituted or unsubstituted ring-forming arylene group having 6 to 12 carbon atoms.

7. L ａ２ The compound according to claim 1 or 2, wherein is a single bond, or a substituted or unsubstituted phenylene group.

8. The compound according to claim 1 or 2, wherein formula (A1) is the following formula (A1-1) or the above formula (A1-2). 【Chemistry 4】 (In formula (A1-1), *3 is L ａ２ This is the binding position to, R ａ２１ ~R ａ２８ One of the selected R is a single bond that joins *4, and is not a single bond that joins *4. ａ２１ ~R ａ２８ Each of these independently consists of a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C2-C50 alkenyl group, a substituted or unsubstituted C2-C50 alkynyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted C7-C50 aralkyl group, a substituted or unsubstituted ring-forming C6-C50 aryl group, a substituted or unsubstituted ring-forming C5-C50 heterocyclic group, a substituted or unsubstituted C1-C50 haloalkyl group, a substituted or unsubstituted C1-C50 haloalkoxy group, and -Si(R ９０１ ) (Caution ９０２ ) (Caution ９０３ A group represented by ) -O-(R ９０４ A group represented by ) or -S-(R ９０５ It is a base represented by ), R ９０１ ~R ９０５ Each of these is independently a hydrogen atom, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted ring-forming C6-C50 aryl group, or a substituted or unsubstituted ring-forming C5-C50 heterocyclic group. R ９０１ If there are two or more of them, then there are two or more R ９０１ They are either identical or different from each other. R ９０２ If there are two or more of them, then there are two or more R ９０２ They are either identical or different from each other. R ９０３ If there are two or more of them, then there are two or more R ９０３ They are either identical or different from each other. R ９０４ If there are two or more of them, then there are two or more R ９０４ They are either identical or different from each other. R ９０５ If there are two or more of them, then there are two or more R ９０５ They are either identical or different from one another. In formula (A1-2), *5 is L ａ２ This is the binding position to, R ａ３１ ~R ａ４０ One of the selected R is a single bond that joins to *6, and is not a single bond that joins to *6. ａ３１ ~R ａ４０ Each of these independently consists of a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C2-C50 alkenyl group, a substituted or unsubstituted C2-C50 alkynyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted C7-C50 aralkyl group, a substituted or unsubstituted ring-forming C6-C50 aryl group, a substituted or unsubstituted ring-forming C5-C50 heterocyclic group, a substituted or unsubstituted C1-C50 haloalkyl group, a substituted or unsubstituted C1-C50 haloalkoxy group, and -Si(R ９０１ ) (Caution ９０２ ) (Caution ９０３ A group represented by ) -O-(R ９０４ A group represented by ) or -S-(R ９０５ It is a base represented by ), R ９０１ ~R ９０５ Each of these is independently a hydrogen atom, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted ring-forming C6-C50 aryl group, or a substituted or unsubstituted ring-forming C5-C50 heterocyclic group. R ９０１ When two or more Rs exist, the two or more Rs ９０１ are the same as or different from each other, R ９０２ If there are two or more of them, then there are two or more R ９０２ They are either identical or different from each other. R ９０３ If there are two or more of them, then there are two or more R ９０３ They are either identical or different from each other. R ９０４ If there are two or more of them, then there are two or more R ９０４ They are either identical or different from each other. R ９０５ When there are two or more Rs ９０５ they may be the same as or different from each other.)

9. The compound according to claim 8, wherein formula (A1) is formula (A1-2).

10. R ａ３１ ~R ａ３４ The compound according to claim 8, wherein one of those selected is a single bond bonded to *6.

11. R ａ３１ and R ａ３４ The compound according to claim 8, wherein one of those selected is a single bond bonded to *6.

12. A compound represented by the following formula (B). 【Transformation 5】 (In formula (B), N ＊ It is the central nitrogen atom. Ar ｂ１ and Ar ｂ２ Each of these is independently a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 30 ring-forming atoms. L ｂ１ ~L ｂ３ These are, independently, single-bonded, substituted, or unsubstituted arylene groups with 6 to 30 ring-forming carbon atoms, or substituted or unsubstituted divalent heterocyclic groups with 5 to 30 ring-forming atoms. R ｂ１ ~R ｂ１３ Each of these independently consists of a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C2-C50 alkenyl group, a substituted or unsubstituted C2-C50 alkynyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted C7-C50 aralkyl group, a substituted or unsubstituted ring-forming C5-C50 heterocyclic group, a substituted or unsubstituted C1-C50 haloalkyl group, a substituted or unsubstituted C1-C50 haloalkoxy group, and -Si(R ９０１ ) (Caution ９０２ ) (Caution ９０３ A group represented by ) -O-(R ９０４ A group represented by ) or -S-(R ９０５ It is a base represented by ), R ９０１ ~R ９０５ Each of these is independently a hydrogen atom, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted ring-forming C6-C50 aryl group, or a substituted or unsubstituted ring-forming C5-C50 heterocyclic group. R ９０１ If there are two or more of them, then there are two or more R ９０１ They are either identical or different from each other. R ９０２ If there are two or more of them, then there are two or more R ９０２ They are either identical or different from each other. R ９０３ If there are two or more of them, then there are two or more R ９０３ They are either identical or different from each other. R ９０４ If there are two or more of them, then there are two or more R ９０４ They are either identical or different from each other. R ９０５ If there are two or more of them, then there are two or more R ９０５ They are either identical or different from one another. However, the central nitrogen atom N ＊ L adjacent to ｂ１ ~L ｂ３ Ar ｂ１ and Ar ｂ２ At least one hydrogen atom selected from the hydrogen atoms present is a deuterium atom, L ｂ３ The unsubstituted p-phenylene group is Ar ｂ１ and Ar ｂ２ Both are unsubstituted naphthyl groups, L ｂ１ and L ｂ２ When at least one selected from is a biphenylene group, the biphenylene group is represented by the following formula (B1). 【Transformation 6】 (In formula (B1), *7 is the central nitrogen atom N ＊ This is the bonding position to Ar ｂ１ or Ar ｂ２ This is the binding position to, R ｂ２１ ~R ｂ２５ One of the selected is a single bond that joins to *8, R ｂ２６ , R ｂ２８ and R ｂ３０ One of the selected R is a single bond that connects to *9, and not a single bond that connects to *8 and *9. ｂ２１ ~R ｂ２５ , R ｂ２６ , R ｂ２８ and R ｂ３０ , and R ｂ２７ and R ｂ２９ Each of these independently consists of a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C2-C50 alkenyl group, a substituted or unsubstituted C2-C50 alkynyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted C7-C50 aralkyl group, a substituted or unsubstituted ring-forming C5-C50 heterocyclic group, a substituted or unsubstituted C1-C50 haloalkyl group, a substituted or unsubstituted C1-C50 haloalkoxy group, and -Si(R ９０１ ) (Caution ９０２ ) (Caution ９０３ A group represented by ) -O-(R ９０４ A group represented by ) or -S-(R ９０５ It is a base represented by ), R ９０１ ~R ９０５ Each of these independently consists of a hydrogen atom, a substituted or unsubstituted C1-C50 alkyl group, and a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group. A substituted or unsubstituted aryl group having 6 to 50 ring-forming carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring-forming atoms, R ９０１ If there are two or more of them, then there are two or more R ９０１ They are either identical or different from each other. R ９０２ If there are two or more of them, then there are two or more R ９０２ They are either identical or different from each other. R ９０３ If there are two or more of them, then there are two or more R ９０３ They are either identical or different from each other. R ９０４ If there are two or more of them, then there are two or more R ９０４ They are either identical or different from each other. R ９０５ If there are two or more of them, then there are two or more R ９０５ They are either identical or different from one another.

13. L ｂ３ The compound according to claim 12, wherein is a single bond, or a substituted or unsubstituted ring-forming arylene group having 6 to 30 carbon atoms.

14. L ｂ３ The compound according to claim 12 or 13, wherein is a single bond, or a substituted or unsubstituted ring-forming arylene group having 6 to 12 carbon atoms.

15. L ｂ１ ~L ｂ３ The compound according to claim 12 or 13, wherein at least one hydrogen atom selected from the hydrogen atoms present is a deuterium atom.

16. Ar ｂ１ and Ar ｂ２ The compound according to claim 12 or 13, wherein is a substituted or unsubstituted ring-forming aryl group having 6 to 30 carbon atoms.

17. Ar ｂ１ and Ar ｂ２ The compound according to claim 12 or 13, wherein is a substituted or unsubstituted ring-forming aryl group having 6 to 18 carbon atoms.

18. A compound represented by the following formula (C). 【Transformation 7】 (In formula (C), N ＊ It is the central nitrogen atom. Ar ｃ１ This is a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by the following formula (C1). 【Transformation 8】 (In formula (C1), *12 is L ｃ１ This is the binding position to [the target]. R ｃ３１ ~R ｃ３８ One of the selected R is a single bond that connects to *13, and is not a single bond that connects to *13. ｃ３１ ~R ｃ３８ , and R ｃ３９ and R ｃ４０ Each of these independently consists of a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C2-C50 alkenyl group, a substituted or unsubstituted C2-C50 alkynyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted C7-C50 aralkyl group, a substituted or unsubstituted ring-forming C6-C50 aryl group, a substituted or unsubstituted ring-forming C5-C50 heterocyclic group, a substituted or unsubstituted C1-C50 haloalkyl group, a substituted or unsubstituted C1-C50 haloalkoxy group, and -Si(R ９０１ ) (Caution ９０２ ) (Caution ９０３ A group represented by ) -O-(R ９０４ A group represented by ) or -S-(R ９０５ It is a base represented by ), R ９０１ ~R ９０５ Each of these independently consists of a hydrogen atom, a substituted or unsubstituted C1-C50 alkyl group, and a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group. A substituted or unsubstituted aryl group having 6 to 50 ring-forming carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring-forming atoms, R ９０１ If there are two or more of them, then there are two or more R ９０１ They are either identical or different from each other. R ９０２ If there are two or more of them, then there are two or more R ９０２ They are either identical or different from each other. R ９０３ If there are two or more of them, then there are two or more R ９０３ They are either identical or different from each other. R ９０４ If there are two or more of them, then there are two or more R ９０４ They are either identical or different from each other. R ９０５ If there are two or more of them, then there are two or more R ９０５ They are either identical or different to one another. L ｃ１ ~L ｃ３ Each of these is independently a single-bonded, substituted, or unsubstituted ring-forming arylene group with 6 to 12 carbon atoms. R ｃ１ ~R ｃ１３ Each of these independently consists of a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C2-C50 alkenyl group, a substituted or unsubstituted C2-C50 alkynyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted C7-C50 aralkyl group, a substituted or unsubstituted ring-forming C5-C50 heterocyclic group, a substituted or unsubstituted C1-C50 haloalkyl group, a substituted or unsubstituted C1-C50 haloalkoxy group, and -Si(R ９０１ ) (Caution ９０２ ) (Caution ９０３ A group represented by ) -O-(R ９０４ A group represented by ) or -S-(R ９０５ It is a base represented by ), R ９０１ ~R ９０５ Each of these independently consists of a hydrogen atom, a substituted or unsubstituted C1-C50 alkyl group, and a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group. A substituted or unsubstituted aryl group having 6 to 50 ring-forming carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring-forming atoms, R ９０１ If there are two or more of them, then there are two or more R ９０１ They are either identical or different from each other. R ９０２ If there are two or more of them, then there are two or more R ９０２ They are either identical or different from each other. R ９０３ If there are two or more of them, then there are two or more R ９０３ They are either identical or different from each other. R ９０４ If there are two or more of them, then there are two or more R ９０４ They are either identical or different from each other. R ９０５ If there are two or more of them, then there are two or more R ９０５ They are either identical or different from one another. R ｃ２１ ~R ｃ２８ One of the selected R is a single bond that connects to *11, and is not a single bond that connects to *11. ｃ２１ ~R ｃ２８ Each of these independently consists of a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted C1-C50 alkyl group, a substituted or unsubstituted C2-C50 alkenyl group, a substituted or unsubstituted C2-C50 alkynyl group, a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group, a substituted or unsubstituted C7-C50 aralkyl group, a substituted or unsubstituted ring-forming C6-C50 aryl group, a substituted or unsubstituted ring-forming C5-C50 heterocyclic group, a substituted or unsubstituted C1-C50 haloalkyl group, a substituted or unsubstituted C1-C50 haloalkoxy group, and -Si(R ９０１ ) (Caution ９０２ ) (Caution ９０３ A group represented by ) -O-(R ９０４ A group represented by ) or -S-(R ９０５ It is a base represented by ), R ９０１ ~R ９０５ Each of these independently consists of a hydrogen atom, a substituted or unsubstituted C1-C50 alkyl group, and a substituted or unsubstituted ring-forming C3-C50 cycloalkyl group. A substituted or unsubstituted aryl group having 6 to 50 ring-forming carbon atoms, or a substituted or unsubstituted heterocyclic group having 5 to 50 ring-forming atoms, R ９０１ If there are two or more of them, then there are two or more R ９０１ They are either identical or different from each other. R ９０２ If there are two or more of them, then there are two or more R ９０２ They are either identical or different from each other. R ９０３ If there are two or more of them, then there are two or more R ９０３ They are either identical or different from each other. R ９０４ If there are two or more of them, then there are two or more R ９０４ They are either identical or different from each other. R ９０５ If there are two or more of them, then there are two or more R ９０５ They are either identical or different from one another. However, L ｃ３ The following equation (C2) is given by L ａ１ It is a single bond, L ａ２ When is an unsubstituted p-phenylene group, Ar ｃ１ is a substituted or unsubstituted naphthyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by the formula (C1), L ｃ３ is an unsubstituted m-phenylene group, L ｃ２ When is a p-phenylene group, R ｃ２１ , R ｃ２４ , R ｃ２５ , and R ｃ２８ One of the selected is a single bond that connects to *13, L ｃ３ The following formula (C3) is given by L ａ１ and L ａ２ When is an unsubstituted p-phenylene group, Ar ｃ１ is a substituted or unsubstituted naphthyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by the formula (C1), L ｃ３ The following formula (C3) is given by L ａ１ It is a single bond, L ａ２ When is an unsubstituted p-phenylene group, Ar ｃ１ is a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted terphenyl group, or a group represented by the formula (C1), L ｃ２ and L ｃ３ When is an unsubstituted p-phenylene group, Ar ｃ１ C1 is a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, or a group represented by formula (C1). 【Chemistry 9】 (In formula (C2), *14 is the bond position to ring C, and *16 is the central nitrogen atom N. ＊ This is the binding position to, R ｃ４２ and R ｃ４４ One of the selected R is a single bond that joins *15, and is not a single bond that joins *15. ｃ４２ and R ｃ４４ , R ｃ４１ , R ｃ４３ , and R ｃ４５ ~R ｃ４９ This is a hydrogen atom. In formula (C3), *17 is the bond position to ring C, and *19 is the central nitrogen atom N. ＊ This is the binding position to, R ｃ５６ and R ｃ５８ One of the selected R is a single bond that joins *18, and is not a single bond that joins *18. ｃ５６ and R ｃ５８ , R ｃ５１ ~R ｃ５５ , R ｃ５７ And R ｃ５９ It is a hydrogen atom.

19. L ｃ３ The compound according to claim 18, wherein is a substituted or unsubstituted ring-forming arylene group having 6 to 12 carbon atoms.

20. L ｃ２ The compound according to claim 18 or 19, wherein is a single bond, or a substituted or unsubstituted phenylene group.

21. Ar ｃ１ The compound according to claim 18 or 19, wherein is a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, or a substituted or unsubstituted biphenyl group.

22. A material for an organic electroluminescent element comprising the compound described in any one of claims 1, 2, 12, 13, 18, and 19.

23. An organic electroluminescent element having a cathode, an anode, and an organic layer between the cathode and the anode, wherein the organic layer includes a light-emitting layer, and at least one layer of the organic layer contains a compound according to any one of claims 1, 2, 12, 13, 18, and 19.

24. The organic electroluminescent element according to claim 23, wherein the organic layer includes a hole transport band between the anode and the light-emitting layer, and the hole transport band includes the compound.

25. The organic electroluminescent element according to claim 24, wherein the hole transport band includes a first hole transport layer on the anode side and a second hole transport layer on the cathode side, and one or both of the first hole transport layer and the second hole transport layer contain the compound.

26. The organic electroluminescent element according to claim 23, wherein the light-emitting layer includes a fluorescent dopant material.

27. The organic electroluminescent element according to claim 23, wherein the light-emitting layer includes a phosphorescent dopant material.

28. An electronic device comprising the organic electroluminescent element described in claim 23.

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