Liquid crystal composition and display panel

Abstract

The present application relates to a liquid crystal composition and a display panel. The liquid crystal composition comprises a liquid crystal monomer and a chiral agent, wherein the chemical structural formula of the liquid crystal monomer is as shown in formula (I); and the optical anisotropy Δn of the liquid crystal composition is greater than or equal to 0.12.

Description

Liquid crystal composition and display panel

[0001] This application claims priority to Chinese Patent Application No. 202411506354.3, filed with the Chinese Patent Office on October 25, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display technology, and in particular to a liquid crystal composition and display panel. Background Technology

[0003] Liquid crystal materials are widely used in various display devices such as mobile phones, televisions, and computers. In thin-film transistor liquid crystal displays (TFT-LCDs), liquid crystals act as "light valves," controlling the amount of backlight transmitted to adjust the brightness of the display device.

[0004] Traditional Vertical Alignment (VA) liquid crystal display panels consist of a TFT substrate, a color filter (CF) substrate, a polyimide (PI) alignment layer sandwiched between the two substrates, and a liquid crystal composition. The liquid crystal molecules in the liquid crystal composition achieve vertical alignment through the PI alignment layer. When the applied voltage is 0V, the long axis of the liquid crystal molecules in a VA mode display is perpendicular to the glass substrate. Natural light, after passing through the polarizer on the TFT substrate side, becomes linearly polarized. At this point, its polarization state and direction cannot be changed by the liquid crystal molecules, and thus it is absorbed by the polarizer on the CF substrate side. In other words, incident light perpendicular to the glass substrate cannot pass through, resulting in a dark display effect. Therefore, VA mode display devices typically exhibit negative dielectric anisotropy (Δε) and high contrast.

[0005] However, the transmittance of LCD panels still needs to be improved. Technical solutions

[0006] This application provides a liquid crystal composition and a display panel that enables liquid crystal molecules to deflect horizontally, achieving a horizontal spiral deflection, thereby improving the transmittance of the display panel.

[0007] To achieve the above objectives, according to a first aspect of this application, a liquid crystal composition is provided, the liquid crystal composition comprising a liquid crystal monomer and a chiral agent, wherein the chemical structural formula of the liquid crystal monomer is shown in Formula I:

[0008] Wherein, R1 and R2 are selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS, -SF5, alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyloxy groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, and alkynyloxy groups having 2-10 carbon atoms. The terminal groups of R1 and R2 are either unsubstituted or substituted by one of CN and CF3. One or more -CH2- in R1 and R2 are not substituted or are substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, and the heteroatoms are not directly bonded; one or more -H in R1 and R2 are not substituted or are substituted by one of -F, -Cl, -Br and -I.

[0009] The optical anisotropy Δn of the liquid crystal composition is greater than or equal to 0.12.

[0010] In accordance with the above-mentioned objectives of this application, embodiments of this application also provide a display panel, which includes:

[0011] First substrate;

[0012] The second substrate is disposed opposite to the first substrate;

[0013] A liquid crystal layer is disposed between the first substrate and the second substrate, and the liquid crystal layer is made of liquid crystal monomers and chiral agents in a liquid crystal composition;

[0014] The liquid crystal composition includes the liquid crystal monomer and the chiral agent, and the chemical structural formula of the liquid crystal monomer is shown in Formula I:

[0015] Wherein, R1 and R2 are selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS, -SF5, alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyloxy groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, and alkynyloxy groups having 2-10 carbon atoms. The terminal groups of R1 and R2 are either unsubstituted or substituted by one of CN and CF3. One or more -CH2- in R1 and R2 are not substituted or are substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, and the heteroatoms are not directly bonded; one or more -H in R1 and R2 are not substituted or are substituted by one of -F, -Cl, -Br and -I.

[0016] The optical anisotropy Δn of the liquid crystal composition is greater than or equal to 0.12. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1 is a schematic diagram of a display panel provided in an embodiment of this application;

[0020] Figure 2 is a schematic diagram of one arrangement of liquid crystal layers in a display panel provided in an embodiment of this application;

[0021] Figure 3 is a schematic diagram of another structure of the display panel provided in an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 11, first substrate; 12, second substrate; 21, first alignment layer; 22, second alignment layer; 30, liquid crystal layer; 31, liquid crystal molecule; 310, liquid crystal arrangement group. Embodiments of the present invention

[0023] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present application and are not intended to limit the present application. The order of description of the following embodiments is not intended to limit the preferred order of embodiments.

[0024] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this general inventive concept pertains. It will be further understood that terms, such as those defined in common dictionaries, should be interpreted as having meaning consistent with their meaning in the context of the relevant field and in the present disclosure, and will not be interpreted in an idealized or overly formal sense unless clearly defined herein.

[0025] In this application, aromatic groups, aromatic families, and aromatic ring systems have the same meaning and can be used interchangeably.

[0026] In this application, heteroaromatic groups, heteroaromatic families, and heteroaromatic ring systems have the same meaning and can be used interchangeably.

[0027] In this application, "substitution" means that the hydrogen atom in the substituent is replaced by the substituent.

[0028] In this application, when the same substituent appears multiple times, it can be independently selected from the same or different groups. If the general formula contains multiple R, then R can be independently selected from different or the same groups.

[0029] In this application, "substituted or unsubstituted" means that the defined group may or may not be substituted. When the defined group is substituted, it should be understood that the defined group can be substituted by one or more substituents R, wherein R is selected from, but is not limited to: deuterium, cyano, isocyano, nitro or halogen (e.g., F, Cl, Br or I), alkyl containing 1-20 carbon atoms, heterocyclic group containing 3-20 ring atoms, aromatic group containing 6-20 ring atoms, heteroaromatic group containing 5-20 ring atoms, -NR'R", silyl, carbonyl, alkoxycarbonyl, aryloxycarbonyl, carbamoyl, haloformyl, formyl, isocyanate, thiocyanate, isothiocyanate, hydroxyl, trifluoromethyl, and the above groups may also be further substituted by substituents acceptable in the art; it is understood that R' and R" in -NR'R" are each independently selected from, but not limited to: H, deuterium, cyano, isocyanate, hydroxyl, hydroxyl, trifluoromethyl, and the above groups may also be further substituted by substituents acceptable in the art; it can be understood that R' and R" in -NR'R" are each independently selected from, but not limited to: H, deuterium, cyano, isocyanate, hydroxyl, hydroxyl, hydroxyl, trifluoromethyl. The R group may be selected from, but is not limited to, a cyano, nitro, or halogen (e.g., F, Cl, Br, or I), an alkyl group containing 1-10 carbon atoms, a heterocyclic group containing 3-20 ring atoms, an aromatic group containing 6-20 ring atoms, or a heteroaromatic group containing 5-20 ring atoms. Preferably, R is selected from, but is not limited to, a deuterium atom, a cyano, an isocyano, a nitro, or a halogen (e.g., F, Cl, Br, or I), an alkyl group containing 1-10 carbon atoms, a heterocyclic group containing 3-10 ring atoms, an aromatic group containing 6-20 ring atoms, a heteroaromatic group containing 5-20 ring atoms, a silyl, a carbonyl, an alkoxycarbonyl, an aryloxycarbonyl, a carbamoyl, a haloformyl, a formyl, an isocyanate group, a thiocyanate group, an isothiocyanate group, a hydroxyl, or a trifluoromethyl group, and the above groups may be further substituted with substituents acceptable in the art.

[0030] In this application, "ring atom number" refers to the number of atoms in the ring itself of a structural compound obtained by atomic bonding to form a ring (e.g., monocyclic compound, fused ring compound, cross-linked compound, carbocyclic compound, heterocyclic compound). When the ring is substituted by a substituent, the atoms contained in the substituent are not included in the ring-forming atoms. The same applies to the "ring atom number" described below unless otherwise specified. For example, the benzene ring has 6 ring atoms, the naphthalene ring has 10 ring atoms, and the thiophene group has 5 ring atoms.

[0031] In this application, "aryl" or "aromatic group" refers to an aromatic hydrocarbon group derived from an aromatic ring compound by removing one hydrogen atom, wherein all ring atoms are carbon atoms. It can be a monocyclic aryl, a fused-ring aryl, or a polycyclic aryl, and for polycyclic rings, at least one of them is an aromatic ring system. For example, "substituted or unsubstituted aryl having 6 to 40 ring atoms" means an aryl containing 6 to 40 ring atoms, preferably a substituted or unsubstituted aryl having 6 to 30 ring atoms, more preferably a substituted or unsubstituted aryl having 6 to 18 ring atoms, particularly preferably a substituted or unsubstituted aryl having 6 to 14 ring atoms, and optionally further substituted on the aryl group; suitable examples include, but are not limited to: phenyl, biphenyl, terphenyl, naphthyl, anthracene, phenanthrene, fluoranthracene, triphenylene, pyrene, perylene, tetraphenyl, fluorenyl, acenaphthene, and their derivatives. It is understood that multiple aryl groups can also be interrupted by short non-aromatic units (for example, based on the total number of atoms in the system, the non-aromatic units preferably contain <10% non-H atoms, such as C, N or O atoms), specifically such as acenaphthene, fluorene, or 9,9-diarylfluorene, triarylamine, diaryl ether systems should also be included in the definition of aryl.

[0032] In this application, "heteroaryl" or "heteroaromatic group" refers to an aryl group in which at least one carbon atom in the ring skeleton is replaced by a non-carbon atom, which can be an N atom, O atom, S atom, etc. That is, the ring atoms of a heteroaryl group include one or more non-carbon atoms selected from N atoms, O atoms, and S atoms. For example, "substituted or unsubstituted heteroaryl group having 5 to 40 ring atoms" refers to a heteroaryl group having 5 to 40 ring atoms, preferably a substituted or unsubstituted heteroaryl group having 6 to 30 ring atoms, more preferably a substituted or unsubstituted heteroaryl group having 6 to 18 ring atoms, particularly preferably a substituted or unsubstituted heteroaryl group having 6 to 14 ring atoms, and the heteroaryl group may optionally be further substituted. Suitable examples include, but are not limited to, thiophene, furanyl, pyrrole, imidazolyl, diazolyl, triazolyl, pyridyl, bipyridyl, pyrimidinyl, etc. Triazinyl, acridineyl, pyridazinyl, pyrazinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl, phthalazinyl, pyridinylpyrimidineyl, pyridinylpyrazinyl, benzothiopheneyl, benzofuranyl, indolyl, pyrroloimidazolyl, pyrrolopyrrololyl, thienopyrrololyl, thienopyrrololyl, furanolololyl, furanolofuranyl, thienofuranyl, benzoisoxazolyl, benzoisothiazolyl, benzoimidazolyl, o-diazonyl, phenanthridineyl, vodiyl, quinazolinoneyl, dibenzothiopheneyl, dibenzofuranyl, carbazoleyl and their derivatives.

[0033] In this application, "alkyl" can refer to a fully saturated straight-chain, branched, and / or cyclic aliphatic hydrocarbon group. The number of carbon atoms in an alkyl group can be 1 to 50, 1 to 30, 1 to 20, 1 to 10, or 1 to 6. Phrases containing this term, such as "C 1-9"Alkyl" refers to an alkyl group containing 1 to 9 carbon atoms, and each time it appears, it can independently be a C1 alkyl, C2 alkyl, C3 alkyl, C4 alkyl, C5 alkyl, C6 alkyl, C7 alkyl, C8 alkyl, or C9 alkyl. Non-limiting examples of alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, isobutyl, 2-ethylbutyl, 3,3-dimethylbutyl, n-pentyl, isopentyl, neopentyl, etc. tert-amyl, cyclopentyl, 1-methylpentyl, 3-methylpentyl, 2-ethylpentyl, 4-methyl-2-pentyl, n-hexyl, 1-methylhexyl, 2-ethylhexyl, 2-butylhexyl, cyclohexyl, 4-methylcyclohexyl, 4-tert-butylcyclohexyl, n-heptyl, 1-methylheptyl, 2,2-dimethylheptyl, 2-ethylheptyl, 2-butylheptyl, n-octyl, tert-octyl, 2-ethyloctyl, 2-butyloctyl, 2-hexyloctyl The compounds include 3,7-dimethyloctyl, cyclooctyl, n-nonyl, n-decyl, adamantyl, 2-ethyldecyl, 2-butyldecyl, 2-hexyldecyl, 2-octyldecyl, n-undecyl, n-dodecyl, 2-ethyldodecyl, 2-butyldodecyl, 2-hexyldodecyl, 2-octyldodecyl, n-tridecyl, n-tetradecyl, n-pentadecanyl, n-hexadecyl, 2-ethylhexadecyl, 2-butylhexadecyl, 2-hexylhexadecyl, 2-octylhexadecyl, n-hepta ...

[0034] In this application, the abbreviations for substituents are: n-n-, sec-sec-, i-iso-, t-tert-, o-ortho-, m-meta-, p-para-, Me-methyl-, Et-ethyl-, Pr-propyl-, Bu-butyl-, Am-n-pentyl-, Hx-hexyl-, and Cy-cyclohexyl-.

[0035] In this application, "amino group" refers to an amine derivative having the structural feature of the formula -N(X)2, wherein each "X" is independently H, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted heterocyclic group, etc. Non-limiting types of amino groups include -NH2, -N(alkyl)2, -NH(alkyl), -N(cycloalkyl)2, -NH(cycloalkyl), -N(heterocyclic)2, -NH(heterocyclic), -N(aryl)2, -NH(aryl), -N(alkyl)(aryl), -N(alkyl)(heterocyclic), -N(cycloalkyl)(heterocyclic), -N(aryl)(heteroaryl), -N(alkyl)(heteroaryl), etc.

[0036] In this application, the term "cycloalkyl" or "cycloalkyl group" refers to a monovalent group having one or more saturated rings in which all ring members are carbon, and the term "alkyl" has the same meaning as described above.

[0037] In this application, the terms "heterocyclic group," "heterocyclic," or "heterocyclic" refer to a fully saturated or partially unsaturated, but non-aromatic, cyclic group having one or more oxygen, sulfur, silicon, or nitrogen heteroatoms in the ring, wherein the nitrogen and sulfur heteroatoms may optionally be oxidized and the nitrogen heteroatoms may optionally be quaternized. The heterocyclic group may be linked to any atom or carbon atom in the ring or ring system and may be unsubstituted or partially substituted as described above for aryl groups.

[0038] In this application, unless otherwise defined, hydroxyl refers to -OH, carboxyl refers to -COOH, carbonyl refers to -C(=O)-, amino refers to -NH2, formyl refers to -C(=O)H, haloformyl refers to -C(=O)Z (where Z represents a halogen (e.g., F, Cl, Br or I)), carbamoyl refers to -C(=O)NH2, isocyanate refers to -NCO, and isothiocyanate refers to -NCS.

[0039] In this application, the term "alkoxy" refers to a group with the structure "-O-alkyl", that is, an alkyl group as defined above that is attached to other groups via an oxygen atom. Suitable examples of phrases containing this term include, but are not limited to: methoxy (-O-CH3 or -OMe), ethoxy (-O-CH2CH3 or -OEt), and tert-butoxy (-OC(CH3)3 or -OtBu).

[0040] In this application, the "*" connected to a single bond indicates a connection or fusion site.

[0041] In this application, when no linking site is specified in the group, it means that any linkable site in the group is selected as the linking site.

[0042] In this application, when no fusion site is specified in the group, it means that any fusionable site in the group is selected as the fusion site, preferably two or more sites in the adjacent position of the group are fusion sites.

[0043] In this application, when the same group contains multiple substituents with the same symbol, the substituents can be the same as or different from each other, for example... The six R's on the benzene ring can be the same or different from each other.

[0044] In this application, the single bonds connecting the substituents extend through the corresponding ring, indicating that the substituent can be attached to any position on the ring, for example... R is attached to any substituted site on the benzene ring; such as express Can be with A fused ring can be formed at any position on the benzene ring.

[0045] The terms cycloalkyl or cycloalkyl as used in this application have the same meaning and are interchangeable.

[0046] In this application, "adjacent groups" means that there are no substituted sites between two substituents.

[0047] In this application, "two adjacent R1s, two adjacent R3s, or two adjacent R5s forming a ring" means a ring system formed by connecting two adjacent R1s, two adjacent R3s, or two adjacent R5s. The ring system can be selected from aliphatic hydrocarbon rings, aliphatic heterocycles, aromatic hydrocarbon rings, or aromatic heterocycles. Preferably, it can form...

[0048] This application provides a liquid crystal composition comprising a liquid crystal monomer and a chiral agent, wherein the chemical structural formula of the liquid crystal monomer is shown in Formula I:

[0049] Wherein, R1 and R2 are selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS, -SF5, alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, and alkynyl groups having 2-10 carbon atoms. The terminal groups of R1 and R2 are not substituted or are replaced by one of CN and CF3. Substitution: One or more -CH2- atoms in R1 and R2 are not substituted or are substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, and the heteroatoms are not directly bonded; one or more -H atoms in R1 and R2 are not substituted or are substituted by one of -F, -Cl, -Br, and -I.

[0050] The optical anisotropy Δn of the liquid crystal composition is greater than or equal to 0.12.

[0051] In the implementation process, the embodiments of this application provide chiral centers for the liquid crystal composition by adding liquid crystal monomers and chiral agents to the liquid crystal composition. Under the action of voltage, the liquid crystal molecules in the liquid crystal layer formed by the liquid crystal composition can generate a horizontal helical deflection, thereby improving the transmittance of the display panel with the liquid crystal layer.

[0052] Specifically, in this application embodiment, by adding a chiral agent to the liquid crystal composition, the optical anisotropy Δn of the liquid crystal composition can be effectively improved; in some embodiments, the optical anisotropy Δn of the liquid crystal composition is less than or equal to 0.17, for example, the optical anisotropy Δn of the liquid crystal composition can be 0.12, 0.13, 0.14, 0.15, 0.16 or 0.17.

[0053] In some embodiments, R1 is selected from alkyl groups having 1 to 5 carbon atoms, and R2 is selected from alkoxy groups having 1 to 5 carbon atoms.

[0054] In some embodiments, the liquid crystal monomer is selected from at least one of the compounds shown in Formula I-1 to Formula I-25:

[0055] In some embodiments, the chiral agent is selected from at least one of the compounds represented by formulas C-1 to C-27:

[0056] In some embodiments, the liquid crystal composition further includes polymeric monomers and self-aligning additives. When the liquid crystal composition provided in this application is used to prepare a liquid crystal layer, an alignment layer can be formed by using self-aligning additives and polymeric monomers, thereby saving the alignment layer process and reducing the process cost.

[0057] In some embodiments, the chemical structural formula of the polymeric monomer is shown in Formula II:

[0058] Among them, R3, R4, R5 and R6 are selected from -H, -F, -Cl, -CF3, alkyl groups having 1 to 5 carbon atoms, and alkoxy groups having 1 to 5 carbon atoms.

[0059] SP1 selected

[0060] It is understandable that the choice of groups for each SP1 in Formula II does not affect each other, meaning that each SP1 can be independently selected.

[0061] In some embodiments, the polymeric monomer is selected from at least one of the compounds represented by Formula II-1 to Formula II-50:

[0062] In some embodiments, the liquid crystal composition further includes a self-aligning additive, which includes a first self-aligning additive having the chemical structural formula shown in Formula III.

[0063] in, Selected from substituted or unsubstituted aromatic groups having 6 to 10 carbon atoms, and substituted or unsubstituted cycloalkyl groups having 6 to 10 carbon atoms.

[0064] In some embodiments, Selected from cyclohexyl, phenyl, and phenyl substituted with an alkyl group having 1 to 5 carbon atoms, such as phenyl substituted with methyl or ethyl.

[0065] R is selected from -H, halogen, alkyl group having 1-25 carbon atoms, alkoxy group having 1-25 carbon atoms, wherein one or more -CH2- in R are unsubstituted or substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CH2CH2-, -CH2O- and -OCH2-, and the heteroatoms are not directly bonded, and one or more -H in R are unsubstituted or substituted by one of F, Cl, Br and I.

[0066] Z is selected from single bonds, -O-, -S-, -CO-, -CO-O-, -OCO-, -O-CO-O-, -OCH2-, -CH2O-, and -(CH2). n1 -, n1 is selected from 1, 2, 3 or 4.

[0067] In some embodiments, Z is selected from a single bond or an ethyl group.

[0068] T is selected from R7, R8 and R9 are selected from -OH, alkyl groups having 1 to 8 carbon atoms, wherein the terminal group of the alkyl group is not substituted or is substituted with -OH, any -CH2- in T is not substituted or is substituted with -O-, and q is selected from any integer from 0 to 8.

[0069] It should be noted that any one or multiple non-adjacent -CH2- in T can be either unsubstituted or substituted by -O-.

[0070] n is selected from 0, 1, 2 or 3.

[0071] m can be selected from 1, 2, 3 or 4.

[0072] In some embodiments, the first self-aligning additive is selected from at least one of the compounds shown in Formula III-1 to Formula III-78:

[0073] Among them, R a Selected from Understandably, R a In Definition in T same.

[0074] In some embodiments, the self-aligning additive in the liquid crystal composition further includes a second self-aligning additive, the chemical structural formula of which is shown in Formula IV:

[0075] Selected from fused rings, spiro rings, bridged rings, cyclohexylene, cyclohexenylene, oxocyclohexylene, or phenylene, where r is selected from 1 or 2.

[0076] In some embodiments, Selected from cyclohexyl.

[0077] R 10 Selected from alkyl, alkoxy, alkenyl, and alkenyloxy groups having 1-10 carbon atoms, R 10 One or more -H in R are not substituted or are substituted by one of -F, -Cl, -Br and -I, and R 10 Any one or more unconnected -CH2- groups are not substituted or are substituted by one of cyclopentylene, cyclobutylene, cyclopropylene, and -O-.

[0078] In some embodiments, R 10 It is selected from at least one of alkyl groups having 1 to 5 carbon atoms and cycloalkyl groups having 1 to 5 carbon atoms.

[0079] It should be noted that R 10 When any one or multiple unconnected -CH2- groups are substituted, the choice of groups among the -CH2- groups does not affect each other, and each -CH2- group can be independently substituted by cyclopentylene, cyclobutylene, cyclopropylene, or -O-.

[0080] L is selected from -F, -Cl, -H, alkyl, alkoxy, alkenyl, and alkenoxy groups having 1-10 carbon atoms. One or more -H groups in L are not substituted or are substituted by one of -F, -Cl, -Br, and -I. Any one or more unconnected -CH2- groups in L are not substituted or are substituted by one of cyclopentylene, cyclobutylene, and cyclopropylene.

[0081] In some embodiments, L is selected from -F and alkyl groups having 1 to 5 carbon atoms.

[0082] It should be noted that when any one or multiple unconnected -CH2- groups in L are substituted, the choice of groups among the -CH2- groups does not affect each other, and each -CH2- group can be independently substituted by one of cyclopentylene, cyclobutylene, or cyclopropylene.

[0083] SP2 is selected from Z1 is selected from single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, alkylene group having 1-10 carbon atoms, alkenyl group having 2-10 carbon atoms, alkynyl group having 2-10 carbon atoms, and any non-adjacent -CH2- in SP2 is not substituted or is substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, and one or more -H in SP2 is not substituted or is substituted by one of -F, -Cl, -Br and -I, and a is selected from any integer from 1 to 10.

[0084] X1 and X2 are selected from hydrogen, -SP3-OH, An alkyl group having 1 to 10 carbon atoms; wherein any one or more unconnected -CH2- groups are not substituted or are substituted by one of cyclopentylene, cyclobutylene, cyclopropylene, or -O-.

[0085] It should be noted that when any one or more unconnected -CH2- groups in the alkyl group are substituted, the choice of groups among the -CH2- groups does not affect each other, and each -CH2- group can be independently substituted by one of cyclopentylene, cyclobutylene, cyclopropylene, or -O-.

[0086] R 11 It is selected from alkyl groups having 1-5 carbon atoms, or fluorinated alkyl groups having 1-5 carbon atoms.

[0087] SP3 is selected from ether, alkyl, alkoxy, alkenyl, and alkenyloxy groups.

[0088] In some embodiments, at least one of X1 and X2 is selected from -SP3-OH.

[0089] In some embodiments, the second self-aligning additive is selected from at least one of the compounds shown in Formula IV-1 to Formula IV-54:

[0090] It should be noted that the liquid crystal composition provided in the embodiments of this application may include at least one of the first self-aligning additive and the second self-aligning additive.

[0091] In some embodiments, the chiral agent has a mass percentage in the liquid crystal composition ranging from 0.01% to 2.0%, for example, the chiral agent has a mass percentage in the liquid crystal composition of 0.01%, 0.05%, 0.1%, 0.15%, or 0.2%; the polymeric monomer has a mass percentage in the liquid crystal composition ranging from 0.01% to 2.0%, for example, the polymeric monomer has a mass percentage in the liquid crystal composition of 0.01%, 0.05%, 0.1%, 0.15%, or 0.2%; the first self-aligning additive has a mass percentage in the liquid crystal composition ranging from 0.1% to 1.5%, for example, the first self-aligning additive has a mass percentage in the liquid crystal composition of 0.01%, 0.05%, 0.1%, or 0.15%; and the second self-aligning additive has a mass percentage in the liquid crystal composition ranging from 0.1% to 1.5%, for example, the second self-aligning additive has a mass percentage in the liquid crystal composition of 0.01%, 0.05%, 0.1%, or 0.15%.

[0092] It is understood that the remaining components in the liquid crystal composition may be the liquid crystal monomers.

[0093] In some embodiments, the liquid crystal composition provided in this application can be used to prepare a vertically aligned (VA) liquid crystal display panel. Because a chiral agent is added to the liquid crystal composition, it provides chiral centers. Under voltage, the liquid crystal molecules in the liquid crystal layer formed by the liquid crystal composition can undergo a horizontal helical deflection, which can compensate for light leakage at the electrode gaps in the display panel in VA mode. This results in the liquid crystal molecules in the liquid crystal layer prepared by the liquid crystal composition provided in this application having both vertical deflection and horizontal rotation, thereby enabling the display panel with this liquid crystal layer to possess both the high contrast characteristics of a VA-type display panel and the high transmittance characteristics of a TN-type display panel, effectively improving the transmittance of the display panel prepared by the liquid crystal composition provided in this application.

[0094] Furthermore, embodiments of this application provide Embodiments 1 to 4 and comparative examples to verify the performance parameters of the liquid crystal composition.

[0095] In Examples 1 to 4 and the comparative examples, the preparation process of the liquid crystal composition included:

[0096] (1) Weigh each component in the liquid crystal composition according to the preset mass percentage using a balance; it should be noted that when weighing multiple liquid crystal compounds, the weighing order is not required; usually, the liquid crystal compounds can be weighed and mixed in order of their melting points from low to high.

[0097] (2) Heat and stir at 60-100℃ to fully dissolve and mix the components in the liquid crystal composition;

[0098] (3) Cool to room temperature and encapsulate to obtain the target sample.

[0099] In some embodiments, in (2), the mixture of liquid crystal compositions can be heat-treated at temperatures such as 60°C, 70°C, 80°C, 90°C or 100°C.

[0100] Furthermore, in Examples 1 to 4 and the comparative examples, the following performance parameters of the liquid crystal composition were verified, specifically including: temperature in °C; Tni representing the clearing point of the liquid crystal composition (unit: °C); Δn representing the optical anisotropy at 25 °C; n e γ represents the refractive index of the unusual light; γ1 represents the rotational viscosity at 25°C (in mPa·s); Δε represents the dielectric anisotropy at 25°C, ε ⊥ is the dielectric constant perpendicular to the long axis of the liquid crystal molecule, pitch represents the pitch of the liquid crystal composition, and Tr is the transmittance at 25°C.

[0101] Table 1 below shows the components and performance parameters of the liquid crystal composition described in Example 1.

[0102] Table 1

[0103] In Example 1, the first to tenth compounds are liquid crystal materials, and the sum of the mass percentages of each component in the liquid crystal materials is 100%. The eleventh compound is a self-aligning additive, and the twelfth compound is a chiral agent. The liquid crystal materials are formulated with a mass percentage of 99.85%, the tenth compound with a mass percentage of 0.1%, and the twelfth compound with a mass percentage of 0.05%.

[0104] Table 2 below shows the components and performance parameters of the liquid crystal composition described in Example 2.

[0105] Table 2

[0106] In Example 2, the first to tenth compounds are liquid crystal materials, and the sum of the mass percentages of each component in the liquid crystal materials is 100%. The eleventh and twelfth compounds are self-aligning additives, and the thirteenth compound is a chiral agent. The liquid crystal materials are formulated with a mass percentage of 99.2%, the tenth compound with a mass percentage of 0.2%, the twelfth compound with a mass percentage of 0.3%, and the thirteenth compound with a mass percentage of 0.3%.

[0107] Table 3 below shows the components and performance parameters of the liquid crystal composition described in Example 3.

[0108] Table 3

[0109] In Example 3, the first to tenth compounds are liquid crystal materials, and the sum of the mass percentages of each component in the liquid crystal materials is 100%. The eleventh and twelfth compounds are self-aligning additives, and the thirteenth compound is a chiral agent. The liquid crystal materials are formulated with a mass percentage of 98.4%, the tenth compound with a mass percentage of 0.4%, the twelfth compound with a mass percentage of 0.4%, and the thirteenth compound with a mass percentage of 0.8%.

[0110] Table 4 below shows the components and performance parameters of the liquid crystal composition described in Example 4.

[0111] Table 4

[0112] In Example 4, the first to eleventh compounds are liquid crystal materials, and the sum of the mass percentages of each component in the liquid crystal materials is 100%. The twelfth and thirteenth compounds are self-aligning additives, and the fourteenth compound is a chiral agent. The liquid crystal materials are formulated with a mass percentage of 97.4%, the twentieth compound with a mass percentage of 0.6%, the thirteenth compound with a mass percentage of 0.6%, and the fourteenth compound with a mass percentage of 1.4%.

[0113] Table 5 below shows the components and performance parameters of the liquid crystal compositions described in the comparative examples.

[0114] Table 5

[0115] Among them, the first to tenth compounds are liquid crystal materials, and the sum of the mass percentages of each component in the liquid crystal material is 100%.

[0116] As can be seen from Tables 1 to 5 above, chiral agents were added to the liquid crystal composition in Examples 1 to 4, and the transmittance Tr obtained in Examples 1 to 4 was greater than that in the comparative example. This indicates that by adding chiral agents to the liquid crystal composition, the transmittance of the display panel made from the liquid crystal composition can be effectively increased. In addition, in Examples 1 to 4, since self-aligning additives were added to the liquid crystal composition, the self-aligning additives can polymerize to form an alignment layer during the process, which can reduce the original alignment film process, save process steps, and reduce process costs.

[0117] In addition, referring to Figures 1, 2 and 3, this application embodiment also provides a display panel, which includes a first substrate 11, a second substrate 12 and a liquid crystal layer 20.

[0118] The first substrate 11 and the second substrate 12 are disposed opposite to each other, and the liquid crystal layer 20 is disposed between the first substrate 11 and the second substrate 12. The liquid crystal layer 20 is made from the liquid crystal monomer and the chiral agent in the liquid crystal composition described in the above embodiments.

[0119] In some embodiments, the display panel may further include a first alignment layer 31 disposed on the side of the first substrate 11 near the liquid crystal layer 20 and a second alignment layer 32 disposed on the side of the second substrate 12 near the liquid crystal layer 20, wherein the liquid crystal layer 20 is located between the first alignment layer 31 and the second alignment layer 32; the first alignment layer 31 and the second alignment layer 32 may be obtained by polymerization of self-aligning additives in the liquid crystal composition described in the above embodiments.

[0120] In some embodiments, the liquid crystal layer 20 includes a plurality of liquid crystal molecules 21. The liquid crystal composition provided in this application embodiment can be used to prepare a vertical alignment (VA) liquid crystal display panel. Therefore, the initial alignment direction provided by the first alignment layer 31 and the second alignment layer 32 for the liquid crystal molecules 21 is a direction perpendicular to the first substrate 11 and the second substrate 12.

[0121] In some embodiments, the display panel can switch between a first mode and a second mode. When the display panel is configured in the first mode, the liquid crystal layer 20 includes a plurality of liquid crystal arrangement groups 210, each liquid crystal arrangement group 210 including a plurality of liquid crystal molecules 21 arranged along the direction of the first substrate 11 close to the second substrate 12. The orthographic projections of two adjacent liquid crystal molecules 21 in the liquid crystal arrangement group 210 on the first substrate 11 intersect each other.

[0122] When the display panel is configured in the second mode, the liquid crystal molecules 21 can be arranged in a direction perpendicular to the first substrate 11 or the second substrate 12, or the liquid crystal molecules 21 can be arranged in a direction biased towards the first substrate 11 or the second substrate 12.

[0123] As described above, since a chiral agent is added to the liquid crystal composition provided in this application embodiment, a chiral center can be provided to the liquid crystal composition. Under the action of voltage, the liquid crystal molecules in the liquid crystal layer formed by the liquid crystal composition can generate a horizontal spiral deflection, which can compensate for light leakage at the electrode gap of the display panel in VA mode. This results in the liquid crystal molecules in the liquid crystal layer made by the liquid crystal composition provided in this application embodiment having both vertical deflection and horizontal rotation, thereby enabling the display panel with this liquid crystal layer to have both the high contrast characteristics of a VA type display panel and the high transmittance characteristics of a TN type display panel, effectively improving the transmittance of the display panel made by the liquid crystal composition provided in this application embodiment.

[0124] In addition, this application embodiment also provides a display device, which includes the display panel described in the above embodiments.

[0125] In some embodiments, the display device further includes a backlight module, and the display panel is disposed on the light-emitting side of the backlight module.

[0126] It is understood that the device provided in this application embodiment has the same display panel as in the above embodiments. Therefore, the display device has the same beneficial effects as in the above embodiments, and will not be repeated here.

[0127] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0128] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0129] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0130] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A liquid crystal composition comprising a liquid crystal monomer and a chiral agent, wherein the chemical structural formula of the liquid crystal monomer is shown in Formula I: in, R1 and R2 are selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS, -SF5, alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyloxy groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, and alkynyloxy groups having 2-10 carbon atoms. The terminal groups of R1 and R2 are either unsubstituted or substituted by one of CN and CF3. One or more -CH2- in R1 and R2 are either unsubstituted or substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, and the heteroatoms are not directly bonded; one or more -H in R1 and R2 are either unsubstituted or substituted by one of -F, -Cl, -Br, and -I. The optical anisotropy Δn of the liquid crystal composition is greater than or equal to 0.

12.

2. The liquid crystal composition according to claim 1, wherein, The optical anisotropy Δn of the liquid crystal composition is less than or equal to 0.

17.

3. The liquid crystal composition according to claim 1, wherein, The liquid crystal monomer is selected from at least one of the compounds shown in Formula I-1 to Formula I-25:

4. The liquid crystal composition according to claim 1, wherein, The chiral agent is selected from at least one of the compounds shown in formulas C-1 to C-27:

5. The liquid crystal composition according to claim 1, wherein, The liquid crystal composition further includes a polymeric monomer, the chemical structural formula of which is shown in Formula II: Among them, R3, R4, R5 and R6 are selected from -H, -F, -Cl, -CF3, alkyl groups having 1-5 carbon atoms, and alkoxy groups having 1-5 carbon atoms; SP1 selected 6. The liquid crystal composition according to claim 5, wherein, The polymeric monomer is selected from at least one of the compounds shown in Formula II-1 to Formula II-50:

7. The liquid crystal composition according to claim 1, wherein, The liquid crystal composition further includes a first self-aligning additive, the chemical structural formula of which is shown in Formula III: in, Selected from substituted or unsubstituted aromatic groups having 6 to 10 carbon atoms, and substituted or unsubstituted cycloalkyl groups having 6 to 10 carbon atoms; R is selected from -H, halogen, alkyl having 1-25 carbon atoms, alkoxy having 1-25 carbon atoms, one or more -CH2- in R are not substituted or are substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CH2CH2-, -CH2O- and -OCH2-, and the heteroatoms are not directly bonded, and one or more -H in R are not substituted or are substituted by one of F, Cl, Br and I; Z is selected from single bonds, -O-, -S-, -CO-, -CO-O-, -OCO-, -O-CO-O-, -OCH2-, -CH2O-, and -(CH2). n1 -, n1 is selected from 1, 2, 3 or 4; T is selected from R7, R8 and R9 are selected from -OH, alkyl groups having 1 to 8 carbon atoms, wherein the terminal group of the alkyl group is not substituted or is substituted with -OH, any -CH2- in T is not substituted or is substituted with -O-, and q is selected from any integer from 0 to 8; n is selected from 0, 1, 2, or 3; m can be selected from 1, 2, 3 or 4.

8. The liquid crystal composition according to claim 7, wherein, The first self-aligning additive is selected from at least one of the compounds shown in Formula III-1 to Formula III-78: Among them, R a Selected from 9. The liquid crystal composition according to claim 1, wherein, The liquid crystal composition further includes a second self-aligning additive, the chemical structure of which is shown in Formula IV: in, Selected from fused rings, spiro rings, bridged rings, cyclohexylene, cyclohexenylene, oxohexylene, or phenylene, where r is selected from 1 or 2; R 10 Selected from alkyl, alkoxy, alkenyl, and alkenyloxy groups having 1-10 carbon atoms, R 10 One or more -H in R are not substituted or are substituted by one of -F, -Cl, -Br and -I, and R 10 Any one or more unconnected -CH2- groups are not substituted or are substituted by one of cyclopentylene, cyclobutylene, cyclopropylene and -O-. L is selected from -F, -Cl, -H, alkyl, alkoxy, alkenyl, and alkenoxy groups having 1-10 carbon atoms. One or more -H groups in L are not substituted or are substituted by one of -F, -Cl, -Br, and -I. Any one or more unconnected -CH2- groups in L are not substituted or are substituted by one of cyclopentylene, cyclobutylene, and cyclopropylene. SP2 is selected from Z1 is selected from single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, alkylene group having 1-10 carbon atoms, alkenyl group having 2-10 carbon atoms, alkynyl group having 2-10 carbon atoms, and any non-adjacent -CH2- in SP2 is not substituted or is substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, one or more -H in SP2 is not substituted or is substituted by one of -F, -Cl, -Br, -I, and a is selected from any integer from 1 to 10; X1 and X2 are selected from hydrogen, -SP3-OH, An alkyl group having 1-10 carbon atoms; wherein any one or more unconnected -CH2- groups are not substituted or are substituted by one of cyclopentylene, cyclobutylene, cyclopropylene, or -O-; R 11 Selected from alkyl groups having 1-5 carbon atoms, and fluorine-substituted alkyl groups having 1-5 carbon atoms; SP3 is selected from ether, alkyl, alkoxy, alkenyl, and alkenyloxy groups.

10. The liquid crystal composition according to claim 9, wherein, At least one of X1 and X2 is selected from -SP3-OH.

11. The liquid crystal composition according to claim 9, wherein, The second self-aligning additive is selected from at least one of the compounds shown in Formula IV-1 to Formula IV-54:

12. The liquid crystal composition according to claim 1, wherein, The chiral agent is present in the liquid crystal composition at a mass ratio ranging from 0.01% to 2.0%.

13. A display panel comprising: First substrate; The second substrate is disposed opposite to the first substrate; A liquid crystal layer is disposed between the first substrate and the second substrate, and the liquid crystal layer is made of liquid crystal monomers and chiral agents in a liquid crystal composition; The liquid crystal composition includes the liquid crystal monomer and the chiral agent, and the chemical structural formula of the liquid crystal monomer is shown in Formula I: Wherein, R1 and R2 are selected from -H, -F, -Cl, -Br, -I, -CN, -SCN, -NCS, -SF5, alkyl groups having 1-10 carbon atoms, alkoxy groups having 1-10 carbon atoms, alkenyl groups having 2-10 carbon atoms, alkenyloxy groups having 2-10 carbon atoms, alkynyl groups having 2-10 carbon atoms, and alkynyloxy groups having 2-10 carbon atoms. The terminal groups of R1 and R2 are either unsubstituted or substituted by one of CN and CF3. One or more -CH2- in R1 and R2 are not substituted or are substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, and the heteroatoms are not directly bonded; one or more -H in R1 and R2 are not substituted or are substituted by one of -F, -Cl, -Br and -I. The optical anisotropy Δn of the liquid crystal composition is greater than or equal to 0.

12.

14. The display panel according to claim 13, wherein, The liquid crystal layer includes a plurality of liquid crystal molecules. When the display panel is configured in a first mode, the liquid crystal layer includes a plurality of liquid crystal arrangement groups. The liquid crystal arrangement groups include a plurality of liquid crystal molecules arranged along the direction of the first substrate close to the second substrate. In this arrangement, the orthographic projections of two adjacent liquid crystal molecules on the first substrate intersect each other.

15. The display panel according to claim 13, wherein, The optical anisotropy Δn of the liquid crystal composition is less than or equal to 0.

17.

16. The display panel according to claim 13, wherein, The liquid crystal monomer is selected from at least one of the compounds shown in Formula I-1 to Formula I-25:

17. The display panel according to claim 13, wherein, The chiral agent is selected from at least one of the compounds shown in formulas C-1 to C-27:

18. The display panel according to claim 13, wherein, The liquid crystal composition further includes a polymeric monomer, the chemical structural formula of which is shown in Formula II: Among them, R3, R4, R5 and R6 are selected from -H, -F, -Cl, -CF3, alkyl groups having 1-5 carbon atoms, and alkoxy groups having 1-5 carbon atoms; SP1 selected 19. The display panel according to claim 13, wherein, The liquid crystal composition further includes a first self-aligning additive, the chemical structural formula of which is shown in Formula III: in, Selected from substituted or unsubstituted aromatic groups having 6 to 10 carbon atoms, and substituted or unsubstituted cycloalkyl groups having 6 to 10 carbon atoms; R is selected from -H, halogen, alkyl having 1-25 carbon atoms, alkoxy having 1-25 carbon atoms, one or more -CH2- in R are not substituted or are substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CH2CH2-, -CH2O- and -OCH2-, and the heteroatoms are not directly bonded, and one or more -H in R are not substituted or are substituted by one of F, Cl, Br and I; Z is selected from single bonds, -O-, -S-, -CO-, -CO-O-, -OCO-, -O-CO-O-, -OCH2-, -CH2O-, and -(CH2). n1 -, n1 is selected from 1, 2, 3 or 4; T is selected from R7, R8 and R9 are selected from -OH, alkyl groups having 1 to 8 carbon atoms, wherein the terminal group of the alkyl group is not substituted or is substituted with -OH, any -CH2- in T is not substituted or is substituted with -O-, and q is selected from any integer from 0 to 8; n is selected from 0, 1, 2, or 3; m can be selected from 1, 2, 3 or 4.

20. The display panel according to claim 13, wherein, The liquid crystal composition further includes a second self-aligning additive, the chemical structure of which is shown in Formula IV: in, Selected from fused rings, spiro rings, bridged rings, cyclohexylene, cyclohexenylene, oxohexylene, or phenylene, where r is selected from 1 or 2; R 10 Selected from alkyl, alkoxy, alkenyl, and alkenyloxy groups having 1-10 carbon atoms, R 10 One or more -H in R are not substituted or are substituted by one of -F, -Cl, -Br and -I, and R 10 Any one or more unconnected -CH2- groups are not substituted or are substituted by one of cyclopentylene, cyclobutylene, cyclopropylene and -O-. L is selected from -F, -Cl, -H, alkyl, alkoxy, alkenyl, and alkenoxy groups having 1-10 carbon atoms. One or more -H groups in L are not substituted or are substituted by one of -F, -Cl, -Br, and -I. Any one or more unconnected -CH2- groups in L are not substituted or are substituted by one of cyclopentylene, cyclobutylene, and cyclopropylene. SP2 is selected from Z1 is selected from single bond, -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, alkylene group having 1-10 carbon atoms, alkenyl group having 2-10 carbon atoms, alkynyl group having 2-10 carbon atoms, and any non-adjacent -CH2- in SP2 is not substituted or is substituted by one of -O-, -S-, -CO-, -C(O)O-, -OC(O)-, -CF2O-, -OCF2-, -CH2CH2-, -CH2O-, -OCH2-, -CH=CH-, -C≡C-, one or more -H in SP2 is not substituted or is substituted by one of -F, -Cl, -Br, -I, and a is selected from any integer from 1 to 10; X1 and X2 are selected from hydrogen, -SP3-OH, An alkyl group having 1-10 carbon atoms; wherein any one or more unconnected -CH2- groups are not substituted or are substituted by one of cyclopentylene, cyclobutylene, cyclopropylene, or -O-; R 11 Selected from alkyl groups having 1-5 carbon atoms, and fluorine-substituted alkyl groups having 1-5 carbon atoms; SP3 is selected from ether, alkyl, alkoxy, alkenyl, and alkenyloxy groups.

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