Compound, material for organic electroluminescence device, organic electroluminescence device and electronic device

Abstract

A compound represented by formula (1) (the symbols in formula (1) are as defined in the description), with which an organic electroluminescent element having further improved element performance is provided.

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 10 disclose compounds used as materials for organic electroluminescence devices. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2015-530364 [Patent Document 2] US Patent Application Publication No. 2019 / 0237668 [Patent Document 3] JP 2019-127487 A [Patent Document 4] JP 2017-022196 A [Patent Document 5] JP 2018-188433 A [Patent Document 6] Korean Patent Publication No. 10-2018-0124728 [Patent Document 7] Korean Patent No. 10-1854886 [Patent Document 8] International Publication No. 2018 / 034517 [Patent Document 9] International Publication No. 2018 / 038544 [Patent Document 10] Korean Patent No. 10-1961346 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 Patent Documents 1 to 10 and other compounds, and as a result have found that a monoamine having, at a central nitrogen atom, a partial structure in which one of the partial structures has a fluorene ring structure, one of the remaining two partial structures has a naphthalene ring structure, and the other partial structure has a naphthalene ring structure, or a partial structure having a terphenyl group having no branched structure, can provide an organic EL device with improved device performance.

[0008] In one aspect, the present invention provides a compound represented by formula (1): [ka]

[0009] (In formula (1), N * is the central nitrogen atom, R 1 ~R7 are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R a and R b are each independently a substituted or unsubstituted alkyl group having 1 to 50 ring carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms. However, R 1 ~R 7 , R a and R b Adjacent two selected from are not bonded to each other and therefore do not form a ring structure. L is a single bond or a substituted or unsubstituted arylene group having 6 to 30 carbon atoms. Ar 1 is represented by the following formula (1-a), and Ar 2is represented by the following formula (1-b) or (1-c). [ka] In formula (1-a), R 11 ~R 18 , R 21 ~R 25 , and R 31 ~R 35 are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R 11 ~R 18 is a single bond bonded to *a, R 21 ~R 25 is a single bond bonded to *b, R 31 ~R 35 is a single bond bonded to *c, ** is nitrogen atom N * represents the bond position to m1 is 0 or 1, n1 is 0 or 1, When m1 is 0 and n1 is 0, *c is a nitrogen atom N * Binds to When m1 is 0 and n1 is 1, *b is a nitrogen atom N * and *c is R 33 Binds to When m1 is 1 and n1 is 0, *c is R 23 Binds to When m1 is 1 and n1 is 1, *c is R 33 Binds to The R that is not a single bond 11 ~R 18 , the R is not a single bond 21 ~R 25 and R which is not a single bond 31 ~R 35 are not bonded to each other and therefore do not form a ring structure. [ka] In formula (1-b), R 41 ~R 48 , R 51 ~R 55 , and R 61 ~R 65 are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R 41 ~R 48 is a single bond bonded to *d, R 51 ~R 55 is a single bond bonded to *e, R 61 ~R 65 is a single bond bonded to *f, ** is nitrogen atom N * represents the bond position to m2 is 0 or 1, n2 is 0 or 1, When m2 is 0 and n2 is 0, *f is a nitrogen atom N * Binds to When m2 is 0 and n2 is 1, *e is a nitrogen atom N * and *f is R 63 Binds to When m2 is 1 and n2 is 0, *f is R 53 Binds to When m2 is 1 and n2 is 1, *f is R 63 Binds to The R that is not a single bond 41 ~R 48 , the R is not a single bond 51 ~R 55 and R which is not a single bond 61 ~R 65are not bonded to each other and therefore do not form a ring structure. [ka] In formula (1-c), R 71 ~R 75 , R 81 ~R 86 , and R 91 ~R 95 are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R 71 ~R 75 is a single bond bonded to *g, R 81 ~R 86 is a single bond bonded to *h, and R81 ~R 86 is a single bond bonded to *i, ** is nitrogen atom N * represents the bond position to The R that is not a single bond 71 ~R 75 , the R is not a single bond 81 ~R 86 and the R 91 ~R 95 are not bonded to each other and therefore do not form a ring structure.)

[0010] In another aspect, the present invention provides a material for an organic EL device, which comprises a compound represented by the formula (1).

[0011] In still another aspect, the present invention provides an organic electroluminescent device comprising an anode, a cathode, and organic layers disposed between the cathode and the anode, the organic layers comprising an emissive layer, and at least one layer of the organic layers comprising a compound represented by formula (1).

[0012] In still another aspect, the present invention provides an electronic device including the organic electroluminescence device. Effect of the Invention

[0013] An organic EL device containing the compound represented by the formula (1) exhibits improved device performance. [Brief description of the drawings]

[0014] [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 an example of a layer structure of another organic EL element according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] [Definition] In this specification, hydrogen atoms include isotopes having different numbers of neutrons, namely protium, deuterium, and tritium.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] "Substituents Described Herein" The substituents described in this specification will be described below.

[0023] 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.

[0024] "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.

[0025] 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).

[0026] [ka]

[0027] [ka]

[0028] 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.

[0029] "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.

[0030] 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).

[0031] 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).

[0032] 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, 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.

[0033] 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.

[0034] 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).

[0035] 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):

[0036] [ka]

[0037] [ka]

[0038] In the general formulae (TEMP-16) to (TEMP-33), XA and YA each independently represent an oxygen atom, a sulfur atom, NH, or CH2, provided that at least one of XA and YA is an oxygen atom, a sulfur atom, or NH. In the general formulae (TEMP-16) to (TEMP-33), when at least one of XA and YA is NH or CH2, the monovalent heterocyclic group derived from the ring structure represented by the general formulae (TEMP-16) to (TEMP-33) includes a monovalent group obtained by removing one hydrogen atom from the NH or CH2.

[0039] 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.

[0040] 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].

[0041] 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].

[0042] 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):

[0043] 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.

[0044] "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.

[0045] 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.

[0046] Substituted alkyl groups (specific example group G3B): Heptafluoropropyl group (including isomers), pentafluoroethyl group, 2,2,2-trifluoroethyl group, and Trifluoromethyl group.

[0047] "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.

[0048] Unsubstituted alkenyl groups (specific example group G4A): Vinyl group, Allyl groups, 1-butenyl group, 2-butenyl group, and 3-Butenyl group.

[0049] 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.

[0050] "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.

[0051] Unsubstituted alkynyl groups (specific example group G5A): Ethynyl group

[0052] "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.

[0053] 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.

[0054] Substituted cycloalkyl groups (specific example group G6B): 4-Methylcyclohexyl group.

[0055] "A group represented by -Si(R901)(R902)(R903)" Specific examples (specific example group G7) of the group represented by -Si(R901)(R902)(R903) described in this specification include: -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.

[0056] "A group represented by -O-(R904)" Specific examples (specific example group G8) of the group represented by -O-(R904) described in this specification include: -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.

[0057] "A group represented by -S-(R905)" Specific examples (specific example group G9) of the group represented by -S-(R905) described in this specification include: -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.

[0058] "A group represented by -N(R906)(R907)" Specific examples (specific example group G10) of the group represented by -N(R906)(R907) described in this specification include: -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. -N(G6)(G6) may be the same or different.

[0059] "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.

[0060] "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.

[0061] "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.

[0062] "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.

[0063] "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.

[0064] "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.

[0065] "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.

[0066] "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.

[0067] "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.

[0068] 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.

[0069] 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.

[0070] In this specification, a carbazolyl group is specifically any of the following groups, unless otherwise specified in the specification.

[0071] [ka]

[0072] In this specification, the (9-phenyl)carbazolyl group is specifically any of the following groups, unless otherwise specified in the specification.

[0073] [ka]

[0074] In the general formulae (TEMP-Cz1) to (TEMP-Cz9), * represents a bonding position.

[0075] In this specification, a dibenzofuranyl group and a dibenzothiophenyl group are specifically any of the following groups, unless otherwise specified in this specification.

[0076] [ka]

[0077] In the above general formulae (TEMP-34) to (TEMP-41), * represents a bonding position.

[0078] 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.

[0079] "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.

[0080] "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.

[0081] "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.

[0082] 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.

[0083] [ka]

[0084] [ka]

[0085] In the general formulae (TEMP-42) to (TEMP-52), Q1 to Q10 each independently represent a hydrogen atom or a substituent. In the above general formulae (TEMP-42) to (TEMP-52), * represents a bonding position.

[0086] [ka]

[0087] In the general formulae (TEMP-53) to (TEMP-62), Q1 to Q10 each independently represent a hydrogen atom or a substituent. Formulae Q9 and Q10 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.

[0088] [ka]

[0089] 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.

[0090] 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.

[0091] [ka]

[0092] [ka]

[0093] [ka]

[0094] In the general formulae (TEMP-69) to (TEMP-82), Q1 to Q9 each independently represent a hydrogen atom or a substituent.

[0095] [ka]

[0096] [ka]

[0097] [ka]

[0098] [ka]

[0099] In the general formulae (TEMP-83) to (TEMP-102), Q1 to Q8 each independently represent a hydrogen atom or a substituent.

[0100] The above is an explanation of "the substituents described in this specification".

[0101] - "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.

[0102] [ka]

[0103] For example, in the case where "one or more pairs of adjacent two or more of R921 to R930 are bonded to each other to form a ring," the pair of adjacent two that constitutes one group is the pair of R921 and R922, the pair of R922 and R923, the pair of R923 and R924, the pair of R924 and R930, the pair of R930 and R925, the pair of R925 and R926, the pair of R926 and R927, the pair of R927 and R928, the pair of R928 and R929, and the pair of R929 and R921.

[0104] The above "one or more pairs" means that two or more pairs of the adjacent two or more pairs may simultaneously form a ring. For example, when R921 and R922 are bonded to each other to form a ring QA, and R925 and R926 are bonded to each other to form a ring QB, the anthracene compound represented by the general formula (TEMP-103) is represented by the following general formula (TEMP-104).

[0105] [ka]

[0106] The case where "a set of two or more adjacent" forms a ring includes not only the case where a set of "two" adjacent as in the above example is bonded, but also the case where a set of "three or more" adjacent is bonded. For example, R921 and R922 are bonded to each other to form a ring QA, and R922 and R923 are bonded to each other to form a ring QC, and a set of three adjacent (R921, R922, and R923) is bonded to each other to form a ring and condensed to the anthracene skeleton. 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), ring QA and ring QC share R922.

[0107] [ka]

[0108] The "monocyclic ring" or "condensed ring" formed may be a saturated or unsaturated ring as the structure of only the ring formed. Even if "one of the pairs of adjacent two" forms a "monocyclic ring" or a "condensed ring", the "monocyclic ring" or the "condensed ring" can form a saturated or unsaturated ring. For example, the ring QA and the ring QB formed in the general formula (TEMP-104) are "monocyclic rings" or "condensed rings", respectively. Also, the ring QA and the ring QC formed in the general formula (TEMP-105) are "condensed rings". The ring QA and the ring QC in the general formula (TEMP-105) are condensed rings by condensing the ring QA and the ring QC. If the ring QA in the general formula (TMEP-104) is a benzene ring, the ring QA is a monocyclic ring. When ring QA in the general formula (TMEP-104) is a naphthalene ring, ring QA is a fused ring.

[0109] 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. "Forming a ring" means forming a ring only with a plurality of atoms of the mother skeleton, or with a plurality of atoms of the mother skeleton and one or more arbitrary elements. For example, the ring QA formed by bonding R921 and R922 shown in the general formula (TEMP-104) means a ring formed by the carbon atom of the anthracene skeleton to which R921 is bonded, the carbon atom of the anthracene skeleton to which R922 is bonded, and one or more arbitrary elements. As a specific example, when R921 and R922 form a ring QA, when the carbon atom of the anthracene skeleton to which R921 is bonded, the carbon atom of the anthracene skeleton to which R922 is bonded, and four carbon atoms form a monocyclic unsaturated ring, the ring formed by R921 and R922 is a benzene ring.

[0110] 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.

[0111] 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").

[0112] 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(R901)(R902)(R903), -O-(R904), -S-(R905), -N(R906)(R907), 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, R901 to R907 are each independently Hydrogen atoms, 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. When two or more R901 are present, the two or more R901 are the same or different, When two or more R902 are present, the two or more R902 are the same or different, When two or more R903 are present, the two or more R903 are the same or different, When two or more R904s are present, the two or more R904s are the same or different from each other, When two or more R905s are present, the two or more R905s are the same or different from each other, When two or more R906s are present, the two or more R906s are the same or different, When two or more R907s are present, the two or more R907s are the same or different.

[0113] 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:

[0114] 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:

[0115] 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."

[0116] 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.

[0117] 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.

[0118] The compounds of the present invention will be described below. A compound according to one embodiment of the present invention is represented by the following formula (1). However, hereinafter, the compounds of the present invention represented by formula (1) and each formula included in formula (1) described below, such as formula (2), formula (3), formula (2-1) to (2-3), and formula (3-1) to (3-3), may be simply referred to as "invention compounds".

[0119] [ka]

[0120] The symbols in formula (1) and formula (1) described later will be explained below. Note that the same symbols have the same meanings.

[0121] In formula (1), N * is the central nitrogen atom, R 1 ~R 7 are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R 1 ~R 7 are each independently preferably a hydrogen atom, a halogen atom, a cyano group, 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, and more preferably a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms.

[0122] The details of the halogen atom are as described above in the section "Substituents described in this specification", and a fluorine atom is preferred.

[0123] Details of the substituted or unsubstituted alkyl group having 1 to 50 carbon atoms 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, an n-butyl group, an isobutyl group, an s-butyl group, or a t-butyl group, more preferably a methyl group, an ethyl group, an isopropyl group, or a t-butyl group, and even more preferably a methyl group or a t-butyl group.

[0124] Details of the substituted or unsubstituted alkenyl group having 2 to 50 ring carbon atoms are as described above in the section "Substituents described in this specification."

[0125] Details of the substituted or unsubstituted alkynyl group having 2 to 50 ring carbon atoms are as described above in the section "Substituents described in this specification."

[0126] Details of the substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms 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, a 1-adamantyl group, a 2-adamantyl group, a 1-norbornyl group, or a 2-norbornyl group, more preferably a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, or a cyclohexyl group, and even more preferably a cyclopentyl group or a cyclohexyl group.

[0127] The details of the substituted or unsubstituted haloalkyl group having 1 to 50 carbon atoms are as described above in the section "Substituents described in this specification", and the preferred is a substituted or unsubstituted fluoroalkyl group having 1 to 50 carbon atoms. The unsubstituted fluoroalkyl group is preferably a trifluoromethyl group, a 2,2,2-trifluoroethyl group, a pentafluoroethyl group, or a heptafluoropropyl group, and more preferably a trifluoromethyl group.

[0128] Details of the substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms are as described above in the section "Substituents described in this specification." The unsubstituted alkoxy group is preferably a methoxy group, an ethoxy group, a propoxy group, or a t-butoxy group.

[0129] The substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms is a group represented by -O(G15), where G15 is the substituted or unsubstituted haloalkyl group. The substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms is preferably a substituted or unsubstituted fluoroalkoxy group having 1 to 50 carbon atoms. The unsubstituted fluoroalkoxy group is preferably a trifluoromethoxy group, a 2,2,2-trifluoroethoxy group, a pentafluoroethoxy group, or a heptafluoropropoxy group, more preferably a trifluoromethoxy group, a 2,2,2-trifluoroethoxy group, or a pentafluoroethoxy group, and even more preferably a trifluoromethoxy group.

[0130] Details of the substituted or unsubstituted alkylthio group having 1 to 50 ring carbon atoms are as described above in the section "Substituents described in this specification." The unsubstituted alkylthio group is preferably a methylthio group, an ethylthio group, a propylthio group, or a butylthio group.

[0131] Details of the substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms are as described above in the section "Substituents described in this specification." The unsubstituted aryloxy group is preferably a phenoxy group, a biphenyloxy group, or a terphenyloxy group, and more preferably a phenoxy group or a biphenyloxy group.

[0132] Details of the substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms are as described above in the section "Substituents described in this specification." The unsubstituted arylthio group is preferably a phenylthio group or a tolylthio group.

[0133] Details of the substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms are as described above in the section "Substituents described in this specification." The unsubstituted aralkyl group is preferably a benzyl group, a phenyl-t-butyl group, an α-naphthylmethyl group, a β-naphthylmethyl group, a 1-β-naphthylisopropyl group, or a 2-β-naphthylisopropyl group, and more preferably a benzyl group, a phenyl-t-butyl group, an α-naphthylmethyl group, or a β-naphthylmethyl group.

[0134] Details of the substituents of the mono-, di- or tri-substituted silyl group are as described above in the section "Substituents described in this specification." The mono-, di- or tri-substituted silyl group is preferably a trimethylsilyl group, a triethylsilyl group, a t-butyldimethylsilyl group, a propyldimethylsilyl group, an isopropyldimethylsilyl group, a triphenylsilyl group, a phenyldimethylsilyl group, a t-butyldiphenylsilyl group, or a tritolylsilyl group, and more preferably a trimethylsilyl group or a triphenylsilyl group.

[0135] R a and R b are each independently a substituted or unsubstituted alkyl group having 1 to 50 ring carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms. R a and R b For details of the substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, see R 1 ~R 7 As described for R a and R bThe substituted or unsubstituted alkyl group having 1 to 50 carbon atoms represented by is even more preferably a methyl group.

[0136] R a and R b Details of the substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms represented by are as described above in the section "Substituents described in this specification." R a and R b The unsubstituted aryl groups having 6 to 50 ring carbon atoms represented by the formula (I) are each independently preferably a phenyl group, a biphenyl group, a naphthyl group, or a phenanthryl group, and more preferably a phenyl group.

[0137] R 1 ~R 7 , R a and R b Any two adjacent ones selected are not bonded to each other and therefore do not form a ring structure.

[0138] L is a single bond or a substituted or unsubstituted arylene group having 6 to 30 carbon atoms. Details of the substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms represented by L are as described above in the section "Substituents described in this specification." provided that one or more substituents which the substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms represented by L may have are each independently Halogen atoms, nitro groups, cyano groups, 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 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 haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. The substituents of L are not bonded to each other and each independently represents R 1 ~R 7 , R a and R b and therefore does not form a ring structure.

[0139] The details of each of the substituents that L may have as a substituent are as follows: R 1 ~R 7 The details of the corresponding groups are the same as those described above. Details of the substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms which L may have as a substituent are as described above in the section "Substituents described in this specification." The unsubstituted aryl groups having 6 to 50 ring carbon atoms which L may have as a substituent are each independently preferably a phenyl group, a biphenyl group, a naphthyl group, or a phenanthryl group. Details of the substituted or unsubstituted heterocyclic group having 5 to 50 ring carbon atoms which L may have as a substituent are as described above in the section "Substituents described in this specification." The substituted or unsubstituted heterocyclic group having 5 to 50 ring carbon atoms which L may have as a substituent is preferably a carbazolyl group, a benzocarbazolyl group, a dibenzofuranyl group, a naphthobenzofuranyl group, a dibenzothiophenyl group, a naphthobenzothiophenyl group, a (9-phenyl)carbazolyl group, a (9-biphenylyl)carbazolyl group, a (9-phenyl)phenylcarbazolyl group, a diphenylcarbazol-9-yl group, a phenylcarbazol-9-yl group, a phenyldibenzofuranyl group, or a phenyldibenzothiophenyl group. L is preferably a single bond, a substituted or unsubstituted phenylene group, or a substituted or unsubstituted naphthylene group.

[0140] Ar 1 is expressed by the following formula (1-a). [ka]

[0141] In formula (1-a), R 11 ~R 18 , R 21 ~R 25 , and R 31 ~R 35 are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R 11 ~R 18 is a single bond bonded to *a, R 21 ~R 25 is a single bond bonded to *b, R 31 ~R 35 is a single bond bonded to *c, ** is nitrogen atom N * represents the bond position to m1 is 0 or 1, n1 is 0 or 1, When m1 is 0 and n1 is 0, *c is a nitrogen atom N * Binds to When m1 is 0 and n1 is 1, *b is a nitrogen atom N * and *c is R 33 Binds to When m1 is 1 and n1 is 0, *c is R 23 Binds to When m1 is 1 and n1 is 1, *c is R 33 Bind to. In one embodiment, it is preferable that m1 is 0 and n1 is 0, and in another embodiment, it is preferable that m1 is 0 and n1 is 1, or m1 is 1 and n1 is 0. In yet another embodiment, it is preferable that m1 is 1 and n1 is 1. The R that is not a single bond 11 ~R 18 , the R is not a single bond 21 ~R 25 and R which is not a single bond 31 ~R 35are not bonded to each other and therefore do not form a ring structure. R 11 ~R 18 , R 21 ~R 25 , and R 31 ~R 35 For details of each group represented by R 1 ~R 7 The details of the corresponding groups are the same as those described above.

[0142] Ar 2 is represented by the following formula (1-b) or (1-c). [ka]

[0143] In formula (1-b), R 41 ~R 48 , R 51 ~R 55 , and R 61 ~R 65 are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R 41 ~R 48 is a single bond bonded to *d, R 51 ~R 55 is a single bond bonded to *e, R 61 ~R 65 is a single bond bonded to *f, ** is nitrogen atom N * represents the bond position to m2 is 0 or 1, n2 is 0 or 1, When m2 is 0 and n2 is 0, *f is a nitrogen atom N * Binds to When m2 is 0 and n2 is 1, *e is a nitrogen atom N * and *f is R 63 Binds to When m2 is 1 and n2 is 0, *f is R 53 Binds to When m2 is 1 and n2 is 1, *f is R 63 Bind to. In one embodiment, it is preferable that m2 is 0 and n2 is 0, and in another embodiment, it is preferable that m2 is 0 and n2 is 1, or m2 is 1 and n2 is 0. In yet another embodiment, it is preferable that m2 is 1 and n2 is 1. The R that is not a single bond 41 ~R 48 , the R is not a single bond 51 ~R 55 and R which is not a single bond 61 ~R 65 are not bonded to each other and therefore do not form a ring structure. R 41 ~R 48 , R 51 ~R 55 , and R 61 ~R65 For details of each group represented by R 1 ~R 7 The details of the corresponding groups are the same as those described above.

[0144] [ka]

[0145] In formula (1-c), R 71 ~R 75 , R 81 ~R 86 , and R 91 ~R 95 are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R 71 ~R75 is a single bond bonded to *g, R 81 ~R 86 is a single bond bonded to *h, and R 81 ~R 86 is a single bond bonded to *i, ** is nitrogen atom N * represents the bond position to The R that is not a single bond 71 ~R 75 , the R is not a single bond 81 ~R 86 and the R 91 ~R 95 are not bonded to each other and therefore do not form a ring structure. R 71 ~R 75 , R 81 ~R 86 , and R 91 ~R 95 For details of each group represented by R 1 ~R 7 The details of the corresponding groups are the same as those described above.

[0146] Therefore, the compound represented by formula (1) is preferably represented by the following formula (2) or (3). [ka] [ka] (In formulas (2) and (3), N * , L, *a, *b, *c, *d, *e, *f, *g, *h, *i, m1, m2, n1, n2, R 1 ~R 7 , R 11 ~R 18 , R 21 ~R 25 , R 31 ~R 35 , R 41 ~R 48 , R 51 ~R 55 , R61 ~R 65 , R 71 ~R 75 , R 81 ~R 86 , R 91 ~R 95 , R a and R b are each independently as defined in formula (1).

[0147] The compound represented by formula (1) is more preferably represented by any one of the following formulas (2-1), (2-2), (2-3), (3-1), (3-2), and (3-3). [ka] [ka] [ka] [ka] [ka] [ka] (In formulas (2-1), (2-2), (2-3), (3-1), (3-2), and (3-3), N * , *a, *b, *c, *d, *e, *f, *g, *h, *i, m1, m2, n1, n2, R 1 ~R 7 , R 11 ~R 18 , R 21 ~R 25 , R 31 ~R 35 , R 41 ~R 48 , R 51 ~R 55 , R 61~R 65 , R 71 ~R 75 , R 81 ~R 86 , R 91 ~R 95 , R a and R b are each independently as defined in formula (1). R 101 ~R 105 , and R 111 ~R 118 are each independently Hydrogen atom, halogen atom, nitro group, cyano group, 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 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 haloalkyl group having 1 to 50 carbon atoms; a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms; a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R 101 ~R105 is a single bond bonded to *j, The R that is not a single bond 101 ~R 105 are not bonded to each other, and each independently represents the R 1 ~R 7 , R a and R b It does not bond to either of the aryl groups and therefore does not form a ring structure. Also, R 111 ~R 118 is a single bond bonded to *k, and R 111 ~R 118 is a single bond bonded to *p, The R that is not a single bond 111 ~R 118 are not bonded to each other, and each independently represents the R 1 ~R 7 , R a and R b It does not bond to either and therefore does not form a ring structure.)

[0148] R 101 ~R 105 , and R 111 ~R 118 The details of each group represented by are the same as the details of the corresponding groups described above with respect to each of the substituents that L may have as a substituent.

[0149] In one embodiment of the present invention, preferably R a and R b are both substituted or unsubstituted phenyl groups, or R a and R b Both are methyl groups, or R a and R b One of these is a methyl group, and the other is a substituted or unsubstituted phenyl group.

[0150] In one aspect of the present invention, (1-1)R 1 ~R 7 may all be hydrogen atoms, (1-2)*R that is not a single bond bonded to a 11 ~R18 may all be hydrogen atoms, (1-3)*R that is not a single bond bonded to b 21 ~R 25 may all be hydrogen atoms, (1-4)*R that is not a single bond bonded to c 31 ~R 35 may all be hydrogen atoms, (1-5)*R ​​that is not a single bond bonded to d 41 ~R 48 may all be hydrogen atoms, (1-6)*R that is not a single bond bonded to e 51 ~R 55 may all be hydrogen atoms, (1-7) * R that is not a single bond bonded to f 61 ~R 65 may all be hydrogen atoms, (1-8)*R that is not a single bond bonded to g 71 ~R 75 may all be hydrogen atoms, (1-9) R that is not a single bond bonded to *h and is not a single bond bonded to *i 81 ~R 86 may all be hydrogen atoms, (1-10)R 91 ~R 95 may all be hydrogen atoms, (1-11)*R that is not a single bond bonded to j 101 ~R 105 may all be hydrogen atoms, (1-12) *R that is not a single bond bonded to k and is not a single bond bonded to p 111 ~R 118 may all be hydrogen atoms.

[0151] As noted above, the term "hydrogen atom" as used herein includes protium, deuterium, and tritium atoms. Thus, the compounds of the invention may contain naturally occurring deuterium atoms. In addition, a deuterium atom may be intentionally introduced into the invention compound by using a compound in which some or all of the raw material compounds are deuterated. Thus, in one embodiment of the present invention, the invention compound contains at least one deuterium atom. That is, the invention compound may be a compound represented by formula (1), in which at least one of the hydrogen atoms contained in the compound is a deuterium atom.

[0152] R 1 ~R 7 A hydrogen atom represented by any of the following: R 1 ~R 7 a hydrogen atom possessed by a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 11 ~R 18 A hydrogen atom represented by any of the following: R 11 ~R 18 a hydrogen atom possessed by a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 21 ~R 25 A hydrogen atom represented by any of the following: R 21 ~R 25a hydrogen atom possessed by a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 31 ~R 35 A hydrogen atom represented by any of the following: R 31 ~R 35 a hydrogen atom possessed by a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 41 ~R 48 A hydrogen atom represented by any of the following: R 41 ~R 48 a hydrogen atom possessed by a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 51 ~R 55 A hydrogen atom represented by any of the following: R 51 ~R 55a hydrogen atom possessed by a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 61 ~R 65 A hydrogen atom represented by any of the following: R 61 ~R 65 a hydrogen atom possessed by a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 71 ~R 75 A hydrogen atom represented by any of the following: R 71 ~R 75 a hydrogen atom possessed by a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 81 ~R 86 A hydrogen atom represented by any of the following: R 81 ~R 86a hydrogen atom possessed by a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 91 ~R 95 A hydrogen atom represented by any of the following: R 91 ~R 95 a hydrogen atom possessed by a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 101 ~R 105 A hydrogen atom represented by any of the following: R 101 ~R 105 a hydrogen atom possessed by a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R 111 ~R 118 A hydrogen atom represented by any of the following: R 111 ~R 118a hydrogen atom possessed by a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted haloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted haloalkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aralkyl group, or a mono-, di-, or tri-substituted silyl group represented by any of the following: R a ~R b a hydrogen atom possessed by a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group represented by any one of the following: A hydrogen atom possessed by a substituted or unsubstituted arylene group represented by the formula (1) when L is not a single bond; At least one hydrogen atom selected from may be a deuterium atom.

[0153] 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 shown below includes a ratio that takes into account trace amounts of naturally occurring isotopes, in addition to the ratio 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.

[0154] 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, still more preferably 10% or more, and 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.

[0155] Details of the substituents (optional substituents) in the case of "substituted or unsubstituted" included in the definition of each formula above are as described in the section "Substituents in the case of "substituted or unsubstituted". Here, one or more substituents which the substituted arylene group having 6 to 30 ring carbon atoms represented by L may have are each independently as described above. 1 ~R 7 ;*R that is not a single bond attached to a 11 ~R 18 ;* R that is not a single bond attached to b 21 ~R 25 ;*R that is not a single bond attached to c 31 ~R 35 ;*R that is not a single bond attached to d 41 ~R 48 ;*R that is not a single bond attached to e 51 ~R 55 ;*R that is not a single bond attached to f 61 ~R 65 ;*R that is not a single bond attached to g 71 ~R 75 ; R that is not a single bond bonded to *h and is not a single bond bonded to *i 81 ~R 86 ;R 91 ~R 97 ;R a ~R b The optional substituents included in the definition of are aryl groups, heterocyclic groups, and -N(R 906 )(R 907 ) is not included. In addition, when L in formula (1) is a substituted arylene group having 6 to 30 ring carbon atoms, one or more substituents which L may have; R which is not a single bond bonded to *j in formula (2-2) and formula (3-2)101 ~R 105 R which is not a single bond bonded to *k in formula (2-3) or (3-3) and is not a single bond bonded to *p 111 ~R 118 The details of the substituents (optional substituents) in the case of "substituted or unsubstituted" included in the definition of are as described in the section "Substituents in the case of "substituted or unsubstituted". However, as the optional substituents, among the substituents described in the section "Substituents in the case of "substituted or unsubstituted", -N(R 906 )(R 907 ) is not included.

[0156] Those skilled in the art can easily prepare the compounds of the invention by referring to the synthesis examples below and known synthesis methods.

[0157] 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.

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[0307] Materials for organic electroluminescence devices The material for organic EL devices according to one embodiment 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 according to one embodiment of the present invention is useful for the production of organic EL devices.

[0308] Organic EL element The organic electroluminescence device according to one embodiment of the present invention comprises a cathode, an anode, and an organic layer disposed between the cathode and the anode. The organic layer comprises a light-emitting layer, and at least one of the organic layers comprises the 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.

[0309] The organic EL device according to one embodiment 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.

[0310] 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 / phosphorescent emitting layer / electron transport layer ( / electron injection layer) (c) (hole injection layer / ) hole transport layer / first fluorescent-emitting layer / second fluorescent-emitting layer / electron transport layer ( / electron injection layer) (d) (hole injection layer / ) hole transport layer / first phosphorescent emitting layer / second phosphorescent emitting layer / electron transport layer ( / electron injection layer) (e) (hole injection layer / ) hole transport layer / phosphorescent emitting layer / space layer / fluorescent emitting layer / electron transport layer ( / electron injection layer) (f) (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) (g) (hole injection layer / ) hole transport layer / first phosphorescent emitting layer / space layer / second phosphorescent emitting layer / space layer / fluorescent emitting layer / electron transport layer ( / electron injection layer) (h) (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) (i) (hole injection layer / ) hole transport layer / electron blocking layer / fluorescent emitting layer / electron transport layer ( / electron injection layer) (j) (hole injection layer / ) hole transport layer / electron blocking layer / phosphorescent emitting layer / electron transport layer ( / electron injection layer) (k) (hole injection layer / ) hole transport layer / exciton blocking layer / fluorescent emitting layer / electron transport layer ( / electron injection layer) (l) (hole injection layer / ) hole transport layer / exciton blocking layer / phosphorescent emitting layer / electron transport layer ( / electron injection layer) (m) (hole injection layer / ) first hole transport layer / second hole transport layer / fluorescent light-emitting layer / electron transport layer ( / electron injection layer) (n) (hole injection layer / ) first hole transport layer / second hole transport layer / phosphorescent emitting layer / electron transport layer ( / electron injection layer) (o) (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) (p) (hole injection layer / ) first hole transport layer / second hole transport layer / phosphorescent emitting layer / first electron transport layer / second electron transport layer ( / electron injection layer) (q) (hole injection layer / ) hole transport layer / fluorescent light-emitting layer / hole blocking layer / electron transport layer ( / electron injection layer) (r) (hole injection layer / ) hole transport layer / phosphorescent emitting layer / hole blocking layer / electron transport layer ( / electron injection layer) (s) (hole injection layer / ) hole transport layer / fluorescent emitting layer / exciton blocking layer / electron transport layer ( / electron injection layer) (t) (hole injection layer / ) hole transport layer / phosphorescent emitting layer / exciton blocking layer / electron transport layer ( / electron injection layer)

[0311] 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 may be provided between each light-emitting layer and the hole transport layer or between each spacer layer as needed. Also, a hole blocking layer may be provided between each light-emitting layer and the electron transport layer as needed. 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.

[0312] Representative device configurations of tandem-type organic EL devices include the following. (2) Anode / first light-emitting unit / middle 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.

[0313] FIG. 1 is a schematic diagram showing an example of the configuration of an organic EL device according to one embodiment of the present invention. The organic EL device 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.

[0314] 2 is a schematic diagram showing another configuration of an organic EL element according to one embodiment of the present invention. The organic EL element 11 includes 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 includes 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.

[0315] In the present invention, a host combined with a fluorescent dopant (fluorescent light-emitting material) is called a fluorescent host, and a host combined with a phosphorescent dopant 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.

[0316] 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 polyimide, 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.

[0317] 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, graphene, etc. In addition, 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), etc. can be mentioned.

[0318] 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.

[0319] 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 methods, inkjet methods, and the like can be used.

[0320] 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.

[0321] 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.

[0322] 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).

[0323] 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.

[0324] Furthermore, it is also preferable to use an acceptor material such as a hexaazatriphenylene (HAT) compound represented by the following formula (K). [ka]

[0325] (In the above formula, R 201 ~R 206 each independently represents a cyano group, -CONH 2 , carboxyl group, or -COOR 207 (R 207 represents an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 20 carbon atoms. 201 and R 202 , R 203 and R 204 , and R 205 and R 206 adjacent two selected from may be bonded to each other to form a group represented by -CO-O-CO-.) R 207 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.

[0326] 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:

[0327] The hole transport layer may be a single-layer structure or a multi-layer structure including two or more layers. For example, the hole transport layer may be a two-layer structure including a first hole transport layer (anode side) and a second hole transport layer (cathode side). 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 multi-layer structure, for example, the second hole transport layer of the two-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 multi-layer structure and the light-emitting layer. In the hole transport layer of the two-layer structure, the compound of the invention may be contained in either the first hole transport layer or the second hole transport layer, or in both layers. In one embodiment of the invention, the compound of the invention is preferably contained only in the first hole transport layer, in another embodiment, the compound of the invention is preferably contained only in the second hole transport layer, and in yet another embodiment, the compound of the invention is preferably contained in both the first and second hole transport layers.

[0328] In one embodiment of the present invention, the compound of the invention contained in one or both of the first hole transport layer and the second hole transport layer is preferably a protolytic compound from the viewpoint of production costs. The proton derivative refers to a compound of the invention in which all hydrogen atoms are proton atoms. Therefore, the organic EL device according to one embodiment of the present invention is preferably an organic EL device in which one or both of the first hole transport layer and the second hole transport layer contain an invention compound substantially composed of protium compounds. The term "invention compound substantially composed of protium compounds" means that the content of protium compounds relative to 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%).

[0329] 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.

[0330] 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.

[0331] 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.

[0332] 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.

[0333] 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.

[0334] 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.

[0335] 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).

[0336] 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)).

[0337] 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).

[0338] 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).

[0339] 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.

[0340] 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.

[0341] 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.

[0342] In particular, in the case of a blue fluorescent element, it is preferable to use the following anthracene compound as the host material.

[0343] [ka]

[0344] [ka]

[0345] [ka]

[0346] 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.

[0347] 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.

[0348] Examples of metal complexes include tris(8-quinolinolato)aluminum(III) (abbreviation: Alq), tris(4-methyl-8-quinolinolato)aluminum (abbreviation: Almq3), and bis(10-hydroxybenzo[h]quinolinato)beryllium (abbreviation: BeBq 2 ), 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).

[0349] 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).

[0350] An azine derivative represented by the following formula (B1) is also preferred as the heteroaromatic compound.

[0351] [ka]

[0352] (In formula (B1), X 31 ~X 33 one of them is a nitrogen atom, and the remaining two are each independently a nitrogen atom or CR. R is Hydrogen atoms, Cyano group, 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, -Si(R 901 )(R 902 )(R 903 ), -O-(R 904 ), a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or It is a substituted or unsubstituted monovalent heterocyclic group having 5 to 50 ring atoms. R 901 ~R904 are each independently Hydrogen atoms, 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 monovalent heterocyclic group having 5 to 50 ring atoms. R 901 ~R 904 If there are two or more, there are two or more R 901 ~R 904 may be the same or different. When a plurality of R's are present, the plurality of R's may be the same or different. A is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted monovalent heterocyclic group having 5 to 50 ring atoms. B is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted monovalent heterocyclic group having 5 to 50 ring atoms. L is a single bond, a substituted or unsubstituted (n+1)-valent aromatic hydrocarbon ring group having 6 to 18 ring carbon atoms, or a substituted or unsubstituted (n+1)-valent heterocyclic group having 5 to 13 ring atoms. The aromatic hydrocarbon ring group may have a structure in which two or more different aromatic hydrocarbon rings are bonded together. Each C is independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted monovalent heterocyclic group having 5 to 60 ring atoms. n is an integer of 1 to 3. When n is 2 or more, L is not a single bond.

[0353] Details of the unsubstituted alkyl group having 1 to 50 carbon atoms, the unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms, the unsubstituted aryl group having 6 to 50 ring carbon atoms, and the unsubstituted monovalent heterocyclic group having 5 to 50 ring atoms are as described above in the section "Substituents Described in this Specification". The unsubstituted (n+1)-valent aromatic hydrocarbon ring group having 6 to 18 ring carbon atoms is a group in which n hydrogen atoms have been removed from an aryl group having 6 to 18 ring carbon atoms selected from the aryl groups described in the above-mentioned "Specific Example Group G1A." The unsubstituted (n+1)-valent heterocyclic group having 5 to 13 ring atoms is a group obtained by removing n hydrogen atoms from a heterocyclic group having 5 to 13 ring atoms selected from the heterocyclic groups described in the above-mentioned "Specific Example Group G2A1", "Specific Example Group G2A2" and "Specific Example Group G2A3". When each of the above groups has a substituent, the details of the substituent are as explained in the section "Substituents in the case of 'substituted or unsubstituted'".

[0354] Specific examples of the compound represented by formula (B1) are shown below, but the compound is not limited to these.

[0355] [ka]

[0356] [ka]

[0357] 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).

[0358] 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.

[0359] 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.

[0360] 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.

[0361] Insulation layer In organic EL elements, 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. A mixture or laminate of these materials may also be used.

[0362] 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.

[0363] 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.

[0364] 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.

[0365] 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.

[0366] The organic EL element can be suitably used in display components such as organic EL panel modules, display devices for televisions, mobile phones, personal computers, and electronic devices such as lighting and light-emitting devices for vehicle lamps. EXAMPLES

[0367] The present invention will be described in more detail below using examples, but the present invention is not limited to the following examples.

[0368] Invention compound used in the production of the organic EL device (I) of Example 1 [ka]

[0369] Comparative compounds used in the manufacture of the organic EL device (I) of Comparative Example 1 [ka]

[0370] Other compounds used in the manufacture of the organic EL devices (I) of Example 1 and Comparative Example 1 [ka] [ka] [ka]

[0371] 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 transparent electrode after cleaning was attached to a substrate holder of a 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 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, a compound BH (host material) and a compound BD (dopant material) were co-deposited to form a light emitting layer having a thickness of 25 nm. The mass ratio of the compound BH to the compound BD (BH:BD) was 96:4. Next, the compound ET-1 was vapor-deposited on this light-emitting layer to form a first electron transport layer having a thickness of 5 nm. Next, the compound ET-2 and (8-quinolinolato)lithium (abbreviation: Liq) were co-deposited on the first electron transport layer to form a second electron transport layer having a thickness of 20 nm. The mass ratio of the compound ET-2 to Liq (ET-2:Liq) was 50:50. 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 (element structure (I)) of the organic EL element (I) of Example 1 thus obtained is shown below. ITO (130) / HT-1:HA=97:3 (10) / HT-1 (80) / Compound 1 (10) / BH:BD=96:4 (25) / ET-1 (5) / ET-2:Liq=50:50 (20) / LiF (1) / Al (50) In the above layer structure, the numbers in parentheses indicate film thicknesses (nm) and the ratios are mass ratios.

[0372] Comparative Example 1 An organic EL device (I) was produced in the same manner as in Example 1, except that the material of the second hole transport layer was changed to Comparative Compound 1 as shown in Table 1 below.

[0373] Evaluation of organic EL elements (I) External quantum efficiency (EQE) measurements The obtained organic EL device (I) was heated at room temperature with a current density of 10 mA / cm 2The device was driven with a constant DC current of 1000 V and the luminance was measured using a spectroradiometer "CS-1000" (manufactured by Konica Minolta, Inc.). The external quantum efficiency (%) was calculated from the measurement results. The results are shown in Table 1.

[0374] [Table 1]

[0375] As is clear from the results in Table 1, the monoamine having a central nitrogen atom to which one partial structure having a fluorene ring structure and the remaining two partial structures having naphthalene ring structures are bonded (Compound 1 in Example 1) exhibited significantly improved external quantum efficiency compared to the monoamine not satisfying the requirements of the present invention (Comparative Compound 1 in Comparative Example 1).

[0376] Invention compound used in the production of organic EL device (II) of Example 2 [ka]

[0377] Comparative compounds used in the manufacture of the organic EL device (II) of Comparative Example 2 [ka]

[0378] Other compounds used in the manufacture of the organic EL devices (II) of Example 2 and Comparative Example 2 [ka] [ka] [ka]

[0379] 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 transparent electrode after cleaning was attached to a substrate holder of a 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 80 nm. Next, Compound 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, a compound BH (host material) and a compound BD (dopant material) were co-deposited to form a light emitting layer having a thickness of 25 nm. The mass ratio of the compound BH to the compound BD (BH:BD) was 96:4. Next, the compound ET-3 was vapor-deposited on this light-emitting layer to form a first electron transport layer having a thickness of 5 nm. Next, the compound ET-2 and Liq were co-deposited on the first electron transport layer to form a second electron transport layer having a thickness of 20 nm. The mass ratio of the compound ET-2 to Liq (ET-2: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 having a thickness of 50 nm. The layer structure (element structure (II)) of the organic EL element (II) of Example 2 thus obtained is shown below. ITO (130) / HT-2:HA=97:3 (10) / HT-2 (80) / Compound 1 (10) / BH:BD=96:4 (25) / ET-3 (5) / ET-2:Liq=50:50 (20) / Liq (1) / Al (50) In the above layer structure, the numbers in parentheses indicate film thicknesses (nm) and the ratios are mass ratios.

[0380] Comparative Example 2 An organic EL device (II) was produced in the same manner as in Example 2, except that the material of the second hole transport layer was changed to Comparative Compound 2 as shown in Table 2 below.

[0381] Evaluation of Organic EL Devices (II) External quantum efficiency (EQE) measurements The obtained organic EL element (II) was driven at room temperature with a constant DC current at a current density of 10 mA / cm2, and the luminance was measured using a spectroradiometer "CS-1000" (manufactured by Konica Minolta, Inc.). The external quantum efficiency (%) was calculated from the measurement results. The results are shown in Table 2.

[0382] [Table 2]

[0383] As is clear from the results in Table 2, the monoamine having a central nitrogen atom to which one partial structure having a fluorene ring structure and the remaining two partial structures having naphthalene ring structures are bonded (Compound 1 in Example 2) exhibited significantly improved external quantum efficiency compared to the monoamine not satisfying the requirements of the present invention (Comparative Compound 2 in Comparative Example 2).

[0384] Invention compounds used in the production of organic EL devices (III) in Examples 3 to 11 [ka] [ka] [ka]

[0385] Comparative compounds used in the manufacture of organic EL devices (III) of Comparative Examples 3 to 6 [ka]

[0386] Other compounds used in the manufacture of the organic EL devices (III) of Examples 3 to 11 and Comparative Examples 3 to 6 [ka] [ka] [ka]

[0387] Fabrication of organic EL element (III) Example 3 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 transparent electrode after cleaning was attached to a substrate holder of a 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 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-2 (host material) and compound BD (dopant material) were co-deposited to form a light-emitting layer having a thickness of 25 nm. The mass ratio of compound BH-2 to compound BD (BH-2:BD) was 96:4. Next, the compound ET-3 was vapor-deposited on this light-emitting layer to form a first electron transport layer having a thickness of 5 nm. Next, the compound ET-2 and Liq were co-deposited on the first electron transport layer to form a second electron transport layer having a thickness of 20 nm. The mass ratio of the compound ET-2 to Liq (ET-2:Liq) was 50:50. 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 (element structure (III)) of the organic EL element (III) of Example 3 thus obtained is shown below. ITO (130) / HT-1:HA=97:3 (10) / HT-1 (80) / Compound 1 (10) / BH-2:BD=96:4 (25) / ET-3 (5) / ET-2:Liq=50:50 (20) / LiF (1) / Al (50) In the above layer structure, the numbers in parentheses indicate film thicknesses (nm) and the ratios are mass ratios.

[0388] Examples 4 to 11 and Comparative Examples 3 to 6 An organic EL device (III) was produced in the same manner as in Example 3, except that the material for the second hole transport layer was changed to a compound shown in Table 3 below.

[0389] Evaluation of Organic EL Device (III) External quantum efficiency (EQE) measurements The obtained organic EL element (III) was driven at room temperature with a constant DC current at a current density of 10 mA / cm2, and the luminance was measured using a spectroradiometer "CS-1000" (manufactured by Konica Minolta, Inc.). The external quantum efficiency (%) was calculated from the measurement results. The results are shown in Table 3.

[0390] [Table 3]

[0391] As is clear from the results in Table 3, the monoamines in which a partial structure having one fluorene ring structure and a partial structure having two naphthalene ring structures are bonded to the central nitrogen atom (the invention compounds used in Examples 3, 4, 7, 8, 10 and 11) and the monoamines in which a partial structure having one fluorene ring structure, a partial structure having one naphthalene ring structure and a partial structure having one terphenyl group having no branched structure are bonded to the central nitrogen atom (the invention compounds used in Examples 5, 6 and 9) showed significantly improved external quantum efficiency compared to the monoamines that do not satisfy the requirements of the present invention (the comparative compounds used in Comparative Examples 3 to 6).

[0392] Compounds 1 to 12 synthesized in Synthesis Examples 1 to 12 [ka] [ka] [ka] [ka]

[0393] Synthesis Example 1: Synthesis of Compound 1 [ka]

[0394] Under an argon atmosphere, a mixture of 4.85g (11.6mmol) of 4-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl]benzenamine, 4.80g (12.1mmol) of 4-bromo-9,9-diphenyl-9H-fluorene, 0.211g (0.230mmol) of tris(dibenzylideneacetone)dipalladium(0), 0.267g (0.920mmol) of tri-t-butylphosphonium tetrafluoroborate, 1.66g (17.3mmol) of sodium-t-butoxide, and 57.5mL of xylene was stirred at 110°C for 3 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 3.70g of a white solid. The yield was 44%. The obtained product was identified as Compound 1 by mass spectrometry (m / e=738 for molecular weight 737.95).

[0395] Synthesis Example 2: Synthesis of Compound 2 [ka]

[0396] The same procedure was carried out as in Synthesis Example 1, except that 4-(2-naphthalenyl)-N-[4-(2-naphthalenyl)phenyl]benzenamine was used instead of 4-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl]benzenamine, to obtain a white solid in a yield of 52%. The obtained product was identified as compound 2 by mass spectrometry (m / e=738 for molecular weight 737.95).

[0397] Synthesis Example 3: Synthesis of Compound 3 [ka]

[0398] In Synthesis Example 1, N-[4-(1-naphthalenyl)phenyl]-9,9-diphenyl-9H-fluoren-4-amine was used instead of 4-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl]benzenamine, and 1-(4'-bromo[1,1'-biphenyl]-4-yl)naphthalene was used instead of 4-bromo-9,9-diphenyl-9H-fluorene, and the same procedure was carried out to obtain a white solid. The yield was 46%. The obtained product was identified as compound 3 by mass spectrometry (m / e=814 for molecular weight 814.04).

[0399] Synthesis Example 4: Synthesis of Compound 4 [ka]

[0400] A white solid was obtained in the same manner as in Synthesis Example 1, except that N-[4-(1-naphthalenyl)phenyl]-9,9-diphenyl-9H-fluoren-4-amine was used instead of 4-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl]benzenamine and 4-bromo-1,1':4',1"-terphenyl were used instead of 4-bromo-9,9-diphenyl-9H-fluorene. The yield was 57%. The obtained product was identified as compound 4 by mass spectrometry (m / e=764 for molecular weight 763.98).

[0401] Synthesis Example 5: Synthesis of Compound 5 [ka]

[0402] A white solid was obtained in the same manner as in Synthesis Example 1, except that N-[1,1':4',1"-terphenyl]-4-yl-1-naphthalenamine was used instead of 4-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl]benzenamine and 4-(4-chlorophenyl)-9,9-dimethyl-9H-fluorene was used instead of 4-bromo-9,9-diphenyl-9H-fluorene. The yield was 36%. The obtained product was identified as compound 5 by mass spectrometry (m / e=640 for molecular weight 639.84).

[0403] Synthesis Example 6: Synthesis of Compound 6 [ka]

[0404] The same procedure was carried out as in Synthesis Example 1, except that 4-bromo-9-methyl-9-phenyl-9H-fluorene was used instead of 4-bromo-9,9-diphenyl-9H-fluorene, to obtain a white solid in a yield of 42%. The obtained product was identified as compound 6 by mass spectrometry (m / e=676 for molecular weight 675.88).

[0405] Synthesis Example 7: Synthesis of Compound 7 [ka]

[0406] A white solid was obtained in the same manner as in Synthesis Example 1, except that 4-(1-naphthalenyl-2,3,4,5,6,7,8-d7)-N-[4-(1-naphthalenyl-2,3,4,5,6,7,8-d7)phenyl]benzenamine was used instead of 4-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl]benzenamine. The yield was 40%. The obtained product was identified as compound 7 by mass spectrometry (m / e=752 for molecular weight 752.03).

[0407] Synthesis Example 8: Synthesis of Compound 8 [ka]

[0408] In Synthesis Example 1, N-[4-(1-naphthalenyl)phenyl]-1-naphthalenamine was used instead of 4-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl]benzenamine, and 4-(2-bromophenyl)-9,9-diphenyl-9Hfluorene was used instead of 4-bromo-9,9-biphenyl-9Hfluorene, and a white solid was obtained in the same manner. The yield was 49%. The obtained product was identified as compound 8 by mass spectrometry (m / e=738 for molecular weight 737.95).

[0409] Synthesis Example 9: Synthesis of Compound 9 [ka]

[0410] The same procedure was carried out as in Synthesis Example 1, except that 4-(2-bromophenyl)-9,9-dimethyl-9H-fluorene was used instead of 4-bromo-9,9-biphenyl-9H-fluorene, to obtain a white solid in a yield of 60%. The obtained product was identified as Compound 9 by mass spectrometry (m / e=690 for molecular weight 689.90).

[0411] Synthesis Example 10: Synthesis of Compound 10 [ka]

[0412] A white solid was obtained in the same manner as in Synthesis Example 1, except that N-[4-(1-naphthalenyl)phenyl][1,1':4',1"-terphenyl]-4-amine was used instead of 4-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl]benzenamine and 4-(2-bromophenyl)-9,9-dimethyl-9H-fluorene was used instead of 4-bromo-9,9-biphenyl-9H-fluorene. The yield was 63%. The obtained product was identified as compound 10 by mass spectrometry (m / e=716 for molecular weight 715.94).

[0413] Synthesis Example 11: Synthesis of Compound 11 [ka]

[0414] Under an argon atmosphere, intermediate A-1 (2.9 g, 16.18 mmol) and DMF (55 ml) were mixed, and N-bromosuccinimide (5.76 g, 32.4 mmol) was added at 0° C. Water and ethyl acetate were added for extraction, and the organic layer obtained was distilled under reduced pressure to obtain intermediate A-2. Intermediate A-2 was subjected to the next reaction without purification. Under an argon atmosphere, intermediate A-2 (6.41 g, 19.12 mmol), 1-naphthylboronic acid (8.22 g, 47.8 mmol), bis(di-t-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II) (406 mg, 0.574 mmol), and 1,4-dioxane (100 ml) were mixed, and an aqueous potassium phosphate solution was added. After heating and stirring at 110°C for 7 hours and allowing to cool, the mixture was filtered and purified by column chromatography and recrystallization to obtain intermediate A (4.9 g). The yield was 71% (2 steps). [ka]

[0415] The same procedure was carried out as in Synthesis Example 1, except that Intermediate A was used instead of 4-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl]benzenamine, to obtain a white solid. The yield was 49%. The obtained product was identified as compound 11 by mass spectrometry (m / e=746 for molecular weight 745.99).

[0416] Synthesis Example 12: Synthesis of Compound 12 [ka]

[0417] A white solid was obtained by the same procedure as in Synthesis Example 1, except that 4'-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl]benzeneamine was replaced with 4'-(1-naphthalenyl)-N-[4-(1-naphthalenyl)phenyl][1,1'-biphenyl]-4-amine and 4-bromo-9,9-diphenyl-9Hfluorene was replaced with 4-bromo-9,9-biphenyl-9Hfluorene. The yield was 51%. The obtained product was identified as compound 12 by mass spectrometry (m / e=690 for molecular weight 689.90). [Explanation of symbols]

[0418] 1, 11 Organic EL element 2. Board 3 Anode 4 cathode 5. Light-emitting layer 6 Hole transport zone (hole transport layer) 6a Hole injection layer 6b First hole transport layer 6c Second hole transport layer 7 Electron transport zone (electron transport layer) 7a First electron transport layer 7b Second electron transport layer 10, 20 Light Emitting Units

Claims

1. A compound represented by the following formula (1): 【Chemistry 1】 (In formula (1), N ＊ is the central nitrogen atom, R １ ~R ７ are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. R ａ and R ｂ are each independently a substituted or unsubstituted alkyl group having 1 to 50 ring carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms. However, R １ ~R ７ , R ａ and R ｂ Adjacent two selected from are not bonded to each other and therefore do not form a ring structure. L is a single bond or a substituted or unsubstituted arylene group having 6 to 30 carbon atoms. Ar １ is represented by the following formula (1-a), and Ar ２ is represented by the following formula (1-b) or (1-c). 【Chemistry 2】 In formula (1-a), R １１ ~R １８ , R ２１ ~R ２５ , and R ３１ ~R ３５ are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R １１ ~R １８ is a single bond bonded to *a, R ２１ ~R ２５ is a single bond bonded to *b, R ３１ ~R ３５ is a single bond bonded to *c, ** is a nitrogen atom ＊ represents the bond position to m1 is 0 or 1, n1 is 0 or 1, When m1 is 0 and n1 is 0, *c is a nitrogen atom N ＊ Binds to When m1 is 0 and n1 is 1, *b is a nitrogen atom N ＊ and *c is R ３３ Binds to When m1 is 1 and n1 is 0, *c is R ２３ Binds to When m1 is 1 and n1 is 1, *c is R ３３ Binds to The R that is not a single bond １１ ~R １８ , the R which is not a single bond ２１ ~R ２５ and R which is not a single bond ３１ ~R ３５ are not bonded to each other and therefore do not form a ring structure. 【Chemistry 3】 In formula (1-b), R ４１ ~R ４８ , R ５１ ~R ５５ , and R ６１ ~R ６５ are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R ４１ ~R ４８ one selected from is a single bond bonded to *d, R ５１ ~R ５５ is a single bond bonded to *e, R ６１ ~R ６５ is a single bond bonded to *f, ** is a nitrogen atom ＊ represents the bond position to m2 is 0 or 1, n2 is 0 or 1, When m2 is 0 and n2 is 0, *f is a nitrogen atom N ＊ Binds to When m2 is 0 and n2 is 1, *e is a nitrogen atom N ＊ and *f is R ６３ Binds to When m2 is 1 and n2 is 0, *f is R ５３ Binds to When m2 is 1 and n2 is 1, *f is R ６３ Binds to The R that is not a single bond ４１ ~R ４８ , the R which is not a single bond ５１ ~R ５５ and R which is not a single bond ６１ ~R ６５ are not bonded to each other and therefore do not form a ring structure. 【Chemistry 4】 In formula (1-c), R ７１ ~R ７５ , R ８１ ~R ８６ , and R ９１ ~R ９５ are each independently Hydrogen atom, halogen atom, nitro group, 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 haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R ７１ ~R ７５ is a single bond bonded to *g, R ８１ ~R ８６ is a single bond bonded to *h, and R ８１ ~R ８６ the other selected from is a single bond bonded to *i, ** is a nitrogen atom ＊ represents the bond position to The R that is not a single bond ７１ ~R ７５ , the R which is not a single bond ８１ ~R ８６ and the R ９１ ~R ９５ are not bonded to each other and therefore do not form a ring structure.)

2. The compound according to claim 1, represented by the following formula (2) or (3): 【Chemistry 5】 【Chemistry 6】 (In formulas (2) and (3), N * , L, *a, *b, *c, *d, *e, *f, *g, *h, *i, m1, m2, n1, n2, R １ ~R ７ , R １１ ~R １８ , R ２１ ~R ２５ , R ３１ ~R ３５ , R ４１ ~R ４８ , R ５１ ~R ５５ , R ６１ ~R ６５ , R ７１ ~R ７５ , R ８１ ~R ８６ , R ９１ ~R ９５ , R ａ and R ｂ are each independently as defined in formula (1).

3. The compound according to claim 1, represented by any one of the following formulas (2-1), (2-2), (2-3), (3-1), (3-2), or (3-3): 【Chemistry 7】 【Chemistry 8】 【Chemistry 9】 【Chemistry 10】 【Chemistry 11】 【Chemistry 12】 (In the formulas (2-1), (2-2), (2-3), (3-1), (3-2), and (3-3), N * , *a, *b, *c, *d, *e, *f, *g, *h, *i, m1, m2, n1, n2, R １ ~R ７ , R １１ ~R １８ , R ２１ ~R ２５ , R ３１ ~R ３５ , R ４１ ~R ４８ , R ５１ ~R ５５ , R ６１ ~R ６５ , R ７１ ~R ７５ , R ８１ ~R ８６ , R ９１ ~R ９５ , R ａ and R ｂ are each independently as defined in formula (1). R １０１ ~R １０５ , and R １１１ ~R １１８ are each independently Hydrogen atom, halogen atom, nitro group, cyano group, 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 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 haloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted haloalkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkylthio group having 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 50 carbon atoms, or The silyl group is a mono-, di-, or tri-substituted silyl group having a substituent selected from 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, and a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms. however, R １０１ ~R １０５ is a single bond bonded to *j, The R that is not a single bond １０１ ~R １０５ are not bonded to each other, and each independently represents the R １ ~R ７ , R ａ and R ｂ It does not bond to either of the aryl groups and therefore does not form a ring structure. Also, R １１１ ~R １１８ is a single bond bonded to *k, and R １１１ ~R １１８ the other selected from is a single bond bonded to *p, The R that is not a single bond １１１ ~R １１８ are not bonded to each other, and each independently represents the R １ ~R ７ , R ａ and R ｂ It does not bond to either, and therefore does not form a ring structure.)

4. R １ ~R ７ , R １１ ~R １８ , R ２１ ~R ２５ , R ３１ ~R ３５ , R ４１ ~R ４８ , R ５１ ~R ５５ , R ６１ ~R ６５ , R ７１ ~R ７５ , R ８１ ~R ８６ , R ９１ ~R ９５ , R １０１ ~R １０５ , R １１１ ~R １１８ , R ａ and R ｂ The compound according to any one of claims 1 to 3, wherein the substituted or unsubstituted alkyl groups having 1 to 50 carbon atoms represented by the formula (I) are each independently selected from the group consisting of a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, an s-butyl group, and a t-butyl group.

5. R １０１ ~R １０５ , R １１１ ~R １１８ , R ａ and R ｂ The compound according to any one of claims 1 to 4, wherein the substituted or unsubstituted aryl groups having 6 to 50 carbon atoms represented by are each independently selected from the group consisting of a phenyl group, a biphenyl group, a naphthyl group, and a phenanthryl group.

6. R ａ and R ｂ are both substituted or unsubstituted phenyl groups, or R ａ and R ｂ are both methyl groups, or R ａ and R ｂ The compound according to any one of claims 1 to 5, wherein one of said groups is a methyl group, and the other is a substituted or unsubstituted phenyl group.

7. R １ ~R ７ The compound according to any one of claims 1 to 6, wherein all of are hydrogen atoms.

8. The compound according to any one of claims 1 to 7, wherein all of R11 to R18 that are not single bonds bonded to a are hydrogen atoms.

9. *The compound according to any one of claims 1 to 8, wherein all of R21 to R25 that are not single bonds bonded to b are hydrogen atoms.

10. *The compound according to any one of claims 1 to 9, wherein all of R31 to R35 that are not single bonds bonded to c are hydrogen atoms.

11. *The compound according to any one of claims 1 to 10, wherein all of R41 to R48 that are not single bonds bonded to d are hydrogen atoms.

12. The compound according to any one of claims 1 to 11, wherein all of R51 to R55 that are not single bonds bonded to e are hydrogen atoms.

13. The compound according to any one of claims 1 to 12, wherein all of R61 to R65 that are not single bonds bonded to f are hydrogen atoms.

14. *The compound according to any one of claims 1 to 10, wherein all of R71 to R75 that are not single bonds bonded to g are hydrogen atoms.

15. * R that is not a single bond bonded to h and is not a single bond bonded to i ８１ ~R ８６ The compound according to any one of claims 1 to 10 and 14, wherein all of are hydrogen atoms.

16. The compound according to any one of claims 1 to 10, 14 and 15, wherein all of R91 to R95 are hydrogen atoms.

17. *The compound according to any one of claims 3 to 16, wherein all of R101 to R105 that are not single bonds bonded to j are hydrogen atoms.

18. The compound according to any one of claims 3 to 16, wherein all of R111 to R118 that are not a single bond bonded to *k and that are not a single bond bonded to *p are hydrogen atoms.

19. The compound according to any one of claims 1 to 18, wherein the compound represented by formula (1) contains at least one deuterium atom.

20. A material for an organic electroluminescence device, comprising the compound according to any one of claims 1 to 19.

21. An organic electroluminescence device having a cathode, an anode, and an organic layer between the cathode and the anode, the organic layer including a light-emitting layer, and at least one layer of the organic layer including the compound according to any one of claims 1 to 19.

22. 22. The organic electroluminescent device of claim 21, wherein the organic layer comprises a hole transporting zone between the anode and the light emitting layer, the hole transporting zone comprising the compound.

23. 23. The organic electroluminescent device of claim 22, wherein the hole transport zone comprises a first hole transport layer on the anode side and a second hole transport layer on the cathode side, and the first hole transport layer, the second hole transport layer, or both contain the compound.

24. The organic electroluminescent device according to claim 23 , wherein the second hole transport layer comprises the compound.

25. 25. The organic electroluminescence device according to claim 23 or 24, wherein the second hole transport layer is adjacent to the light emitting layer.

26. The organic electroluminescence device according to any one of claims 21 to 25, wherein the light-emitting layer contains a fluorescent dopant material.

27. The organic electroluminescence device according to any one of claims 21 to 25, wherein the light-emitting layer contains a phosphorescent dopant material.

28. An electronic device comprising the organic electroluminescence device according to any one of claims 21 to 27.

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