CN113072953A - Negative liquid crystal composition with large elastic constant and application thereof - Google Patents

Negative liquid crystal composition with large elastic constant and application thereof Download PDF

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Publication number
CN113072953A
CN113072953A CN202010006387.7A CN202010006387A CN113072953A CN 113072953 A CN113072953 A CN 113072953A CN 202010006387 A CN202010006387 A CN 202010006387A CN 113072953 A CN113072953 A CN 113072953A
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general formula
compound represented
liquid crystal
crystal composition
percentage
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陈卯先
储士红
姜天孟
陈海光
未欣
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Beijing Bayi Space LCD Technology Co Ltd
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Beijing Bayi Space LCD Technology Co Ltd
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Priority to CN202010006387.7A priority Critical patent/CN113072953A/en
Priority to PCT/CN2020/077022 priority patent/WO2021134886A1/en
Priority to TW109126565A priority patent/TW202126790A/en
Publication of CN113072953A publication Critical patent/CN113072953A/en
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    • G02—OPTICS
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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
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    • C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
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    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
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Abstract

The invention relates to a liquid crystal composition, in particular to a negative liquid crystal composition with a large elastic constant and application thereof, wherein the liquid crystal composition comprises at least one of compounds represented by a general formula I, at least one of compounds represented by a general formula II, at least one of compounds represented by a general formula III and at least one of compounds represented by a general formula IV; the liquid crystal composition has large elastic constant and low rotational viscosity, and can improve contrast and realize quick response time when applied to a liquid crystal display.

Description

Negative liquid crystal composition with large elastic constant and application thereof
Technical Field
The invention relates to a liquid crystal composition, in particular to a negative liquid crystal composition with a large elastic constant and application thereof; the liquid crystal composition provided by the invention has a large elastic constant and a fast response time, and is suitable for liquid crystal displays, so that the contrast of the liquid crystal displays can be improved.
Background
Currently, LCD displays are widely used in various products as the most mainstream displays; among them, the IPS and FFS mode displays are widely used in products such as mobile phones, notebook computers, tablet computers, computer monitors, televisions, etc. because of their unique hard screen characteristics and very wide viewing angle characteristics.
IPS and FFS liquid crystal plane alignment leads to easy occurrence of light leakage in a dark state, and is significantly inferior in contrast performance to VA-type (MVA, PVA, UV2A, PSVA) displays. Research shows that when liquid crystal molecules are initially arranged, alignment debris and the like existing on the surface of an alignment layer can cause the disordered arrangement of the liquid crystal molecules so as to cause dark-state light leakage; how to improve the disorder of the liquid crystal alignment becomes a key factor of how to improve IPS and FFS mode displays, and it is found through research that an increase in the elastic constant of the liquid crystal contributes to improving the alignment of the liquid crystal molecules.
For the IPS mode and the FFS mode, positive liquid crystal can be used, and negative liquid crystal can also be used, as the negative liquid crystal molecules are arranged in the direction vertical to the electric field lines under the action of an electric field, and compared with the positive liquid crystal molecules which are arranged along the electric field lines under the action of the electric field, the negative liquid crystal molecules are used, the problems of transmittance sacrifice and flicker caused by bending the electric field under the IPS mode and the FFS mode are avoided, and further the transmittance and flicker of the liquid crystal display are improved.
The invention aims to provide a liquid crystal composition with a large elastic constant, so as to achieve the aim of improving the contrast of a liquid crystal display, and simultaneously the liquid crystal composition has negative dielectric anisotropy, has higher transmittance when being used in the liquid crystal display and has the effect of improving the flicker of the liquid crystal display.
It is known to those skilled in the art that raising the clearing point of the liquid crystal composition can achieve the purpose of raising the elastic constant, but as the clearing point is raised, the rotational viscosity of the liquid crystal composition increases, thereby causing the response time of the liquid crystal display to become slow; the liquid crystal composition provided by the invention has a large elastic constant on one hand and a low rotational viscosity on the other hand, so that a liquid crystal display with high contrast and quick response is realized.
Disclosure of Invention
The invention provides a liquid crystal composition which has a large elastic constant and low rotational viscosity, can improve the contrast ratio when being applied to a liquid crystal display and can realize quick corresponding time.
In order to achieve the purpose, the invention adopts the technical scheme that: a negative liquid crystal composition with large elastic constant comprises at least one of compounds represented by a general formula I, at least one of compounds represented by a general formula II, at least one of compounds represented by a general formula III and at least one of compounds represented by a general formula IV;
Figure BDA0002355425900000011
Figure BDA0002355425900000021
wherein, in the general formula I, R1、R2Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a);
in the general formula II, R3、R4Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); n is1Represents 0 or 1; a. the1One selected from the following groups:
Figure BDA0002355425900000022
in the general formula III, R5、R6Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a);
in the general formula IV, R7、R8Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12Linear alkenyl of (A)2、A3Each independently represents trans-1, 4-cyclohexyl or 1, 4-phenylene.
The compound represented by the general formula I provided by the invention is a neutral compound containing a cyclohexene structure, the structure has a very large elastic constant, and the rotational viscosity of the compound is low, so that the elastic constant can be effectively improved when the compound is used in a liquid crystal composition.
Specifically, the compound represented by the general formula I is selected from one or more compounds represented by formulas IA to IB:
Figure BDA0002355425900000023
wherein R is1、R2Each independently represents C1～C7Straight chain alkyl or C2～C7A linear alkenyl group of (a);
preferably, the compound represented by formula I is selected from one or more of the compounds represented by formula IA1 to formula IB 45:
Figure BDA0002355425900000024
Figure BDA0002355425900000031
Figure BDA0002355425900000041
Figure BDA0002355425900000051
more preferably, the compound represented by the general formula I is selected from one or more of IA3, IA12, IA21, IA23, IA24, IA25, IA39, IA43, IB3, IB5, IB8, IB10, IB26, IB27, IB30 and IB 31;
particularly preferably, the compound represented by the general formula I is selected from one or more of IA3, IA21, IA23, IA24, IA25, IA39, IA43, IB3, IB5, IB8, IB10, IB26, IB27, IB30 and IB 31;
most preferably, the compound represented by formula I is selected from one or more of IA3, IA21, IA23, IA39, IB3, IB5, IB8, IB10, IB26, IB27, IB30, IB 31.
The compound represented by the general formula II provided by the invention is a tricyclic compound containing a2, 3-difluorobenzene structure, has larger negative dielectric anisotropy and high clearing point, and can effectively improve the dielectric anisotropy and the clearing point of a liquid crystal composition when being used in the liquid crystal composition.
Specifically, the compound represented by the general formula II is selected from one or more compounds represented by the formulas IIA to IIF:
Figure BDA0002355425900000052
Figure BDA0002355425900000061
wherein R is3、R4Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a);
preferably, the compound represented by the general formula II is one or more compounds selected from the group consisting of compounds represented by the formulas IIA 1-IIF 48:
Figure BDA0002355425900000062
Figure BDA0002355425900000071
Figure BDA0002355425900000081
Figure BDA0002355425900000091
Figure BDA0002355425900000101
Figure BDA0002355425900000111
Figure BDA0002355425900000121
more preferably, the compound represented by the general formula II is selected from one or more of IIA14, IIA16, IIA22, IIC14, IIC15, IID10, IID13, IID14, IID15, IID16, IID18, IIE14, IIE18, IIF13 and IIF 14.
The compound represented by the general formula III provided by the invention is a compound containing a benzofuran structure, has very large negative dielectric anisotropy and relatively large optical anisotropy, and is very effective in improving the dielectric anisotropy and the optical anisotropy of the liquid crystal composition.
Specifically, the compound represented by the general formula III is selected from one or more compounds represented by the formulas III1 to III 66:
Figure BDA0002355425900000122
Figure BDA0002355425900000131
Figure BDA0002355425900000141
Figure BDA0002355425900000151
preferably, the compound represented by the general formula III is selected from one or more of III54, III55, III56, III57 and III 63.
The compound represented by the general formula IV provided by the invention is a neutral two-ring structure compound, has very low rotational viscosity, and is very effective for reducing the rotational viscosity of a liquid crystal composition.
Specifically, the compound represented by the general formula IV is selected from one or more of the compounds represented by the formulae IVA to IVC:
Figure BDA0002355425900000152
wherein R is7、R8Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a);
preferably, the compound represented by formula IV is selected from one or more of the compounds represented by formulae IVA1 to formula IVC 24:
Figure BDA0002355425900000153
Figure BDA0002355425900000161
Figure BDA0002355425900000171
more preferably, the compound represented by formula IV is selected from one or more of IVA3, IVA7, IVA11, IVA12, IVA25, IVA29, IVA31, IVA37, IVB18, IVB22, IVC2, IVC4, IVC15, IVC 20;
particularly preferably, the compound represented by formula IV is selected from one or more of IVA25, IVA29, IVA37, IVB18, IVB22, IVC2, IVC4, IVC15, and IVC 20.
The liquid crystal composition provided by the invention also comprises at least one of the compounds represented by the general formulas V and/or VI:
Figure BDA0002355425900000172
wherein, in the general formula V, R9、R10Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); a. the4Represents trans-1, 4-cyclohexyl or 1, 4-phenylene;
in the general formula VI, R11Represents C1～C7Straight chain alkyl or C2～C7A linear alkenyl group of (a); r12Represents C1～C7Linear alkyl or linear alkoxy of (a); l is1、L2、L3Each independently represents H or F.
Specifically, the compound represented by the general formula V is selected from one or more of compounds represented by the formulae VA to VB:
Figure BDA0002355425900000181
wherein R is9、R10Each independently represents C1～C7Straight chain alkyl ofAlkoxy radicals or C2～C7A linear alkenyl group of (a);
preferably, the compound represented by formula V is selected from one or more of the compounds represented by formulae VA1 to VB 38:
Figure BDA0002355425900000182
Figure BDA0002355425900000191
specifically, the compound represented by formula VI is selected from one or more of VIA or VIB:
Figure BDA0002355425900000192
wherein R is11Represents C1～C7Straight chain alkyl or C2～C7A linear alkenyl group of (a); r12Represents C1～C7Linear alkyl or linear alkoxy of (a);
preferably, the compound represented by formula VI is selected from one or more of the compounds represented by formula VIA1 to formula VIB 24:
Figure BDA0002355425900000193
Figure BDA0002355425900000201
in the liquid crystal composition, the general formula V and the general formula IV can be added simultaneously or alternatively.
Specifically, in order to enable the liquid crystal composition to meet different requirements, the liquid crystal composition provided by the invention comprises the following components in percentage by mass:
(1) 1-30% of a compound represented by the general formula I;
(2) 20-70% of a compound represented by the general formula II;
(3) 1-20% of a compound represented by the general formula III;
(4) 10-60% of a compound represented by the general formula IV;
(5) 0-20% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 30-66% of a compound represented by the general formula II;
(3) 2-16% of a compound represented by the general formula III;
(4) 15-55% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
more preferably, the following components are contained in percentage by mass:
(1) 4-16% of a compound represented by the general formula I;
(2) 36-63% of a compound represented by the general formula II;
(3) 3-12% of a compound represented by the general formula III;
(4) 19-47% of a compound represented by the general formula IV;
(5) 0-8% of a compound represented by general formula V and/or VI;
or, the liquid crystal composition provided by the invention comprises the following components in percentage by mass:
(1) 3-12% of a compound represented by the general formula I;
(2) 30-62% of a compound represented by the general formula II;
(3) 2-15% of a compound represented by the general formula III;
(4) 25-55% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-12% of a compound represented by the general formula I;
(2) 36-58% of a compound represented by the general formula II;
(3) 3-12% of a compound represented by the general formula III;
(4) 27 to 47% of a compound represented by the general formula IV;
(5) 0-8% of a compound represented by general formula V and/or VI;
or, the liquid crystal composition provided by the invention comprises the following components in percentage by mass: (1) 7-20% of a compound represented by the general formula I;
(2) 30-65% of a compound represented by the general formula II;
(3) 2-15% of a compound represented by the general formula III;
(4) 15-50% of a compound represented by the general formula IV;
(5) 0 to 10% of a compound represented by the general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 7-16% of a compound represented by the general formula I;
(2) 36-63% of a compound represented by the general formula II;
(3) 3-12% of a compound represented by the general formula III;
(4) 19 to 46% of a compound represented by the general formula IV;
(5) 0-6% of a compound represented by general formula V and/or VI;
or, the liquid crystal composition provided by the invention comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 45-65% of a compound represented by the general formula II;
(3) 2-15% of a compound represented by the general formula III;
(4) 15-47% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-16% of a compound represented by the general formula I;
(2) 45-63% of a compound represented by the general formula II;
(3) 3-11% of a compound represented by the general formula III;
(4) 19 to 43% of a compound represented by the general formula IV;
(5) 0-8% of a compound represented by general formula V and/or VI;
or, the liquid crystal composition provided by the invention comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 33-55% of a compound represented by the general formula II;
(3) 2-15% of a compound represented by the general formula III;
(4) 25 to 50% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-16% of a compound represented by the general formula I;
(2) 36-55% of a compound represented by the general formula II;
(3) 3-12% of a compound represented by the general formula III;
(4) 27 to 47% of a compound represented by the general formula IV;
(5) 0-8% of a compound represented by general formula V and/or VI;
or, the liquid crystal composition provided by the invention comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 33-65% of a compound represented by the general formula II;
(3) 2-7% of a compound represented by the general formula III;
(4) 15-50% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-16% of a compound represented by the general formula I;
(2) 36-63% of a compound represented by the general formula II;
(3) 3-7% of a compound represented by the general formula III;
(4) 19-47% of a compound represented by the general formula IV;
(5) 0-8% of a compound represented by general formula V and/or VI;
or, the liquid crystal composition provided by the invention comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 33-65% of a compound represented by the general formula II;
(3) 5-15% of a compound represented by the general formula III;
(4) 15-50% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-16% of a compound represented by the general formula I;
(2) 36-63% of a compound represented by the general formula II;
(3) 5-12% of a compound represented by the general formula III;
(4) 19-47% of a compound represented by the general formula IV;
(5) 0-7% of a compound represented by general formula V and/or VI;
or, the liquid crystal composition provided by the invention comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 33-65% of a compound represented by the general formula II;
(3) 2-15% of a compound represented by the general formula III;
(4) 15-50% of a compound represented by the general formula IV;
preferably, the composition comprises the following components in percentage by mass:
(1) 5-16% of a compound represented by the general formula I;
(2) 36-63% of a compound represented by the general formula II;
(3) 3-12% of a compound represented by the general formula III;
(4) 19 to 46% of a compound represented by the general formula IV;
or, the liquid crystal composition provided by the invention comprises the following components in percentage by mass:
(1) 3-15% of a compound represented by the general formula I;
(2) 33-58% of a compound represented by the general formula II;
(3) 2-9% of a compound represented by the general formula III;
(4) 25 to 50% of a compound represented by the general formula IV;
(5) 1-10% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-12% of a compound represented by the general formula I;
(2) 36-54% of a compound represented by the general formula II;
(3) 3-7% of a compound represented by the general formula III;
(4) 30-47% of a compound represented by the general formula IV;
(5) and 5-8% of a compound represented by the general formula V and/or VI.
The liquid crystal composition provided by the invention has the advantages that the elastic constant is improved through the compound represented by the general formula I; the dielectric anisotropy and the intersolubility are improved by the compound represented by the general formula II; increasing the dielectric anisotropy and increasing the optical anisotropy by adding a compound of the formula III; reducing the rotational viscosity by adding a compound of formula IV; thereby realizing a liquid crystal composition required for a liquid crystal display having a fast response and a high contrast.
The method for producing the liquid crystal composition of the present invention is not particularly limited, and it can be produced by mixing two or more compounds by a conventional method, such as a method of mixing the different components at a high temperature and dissolving each other, wherein the liquid crystal composition is dissolved and mixed in a solvent for the compounds, and then the solvent is distilled off under reduced pressure; alternatively, the liquid crystal composition of the present invention can be prepared by a conventional method, for example, by dissolving the component having a smaller content in the main component having a larger content at a higher temperature, or by dissolving each of the components in an organic solvent, for example, acetone, chloroform or methanol, and then mixing the solutions to remove the solvent.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Unless otherwise indicated, percentages in the present invention are weight percentages; the temperature units are centigrade; Δ n represents optical anisotropy (25 ℃); epsilon∥And ε⊥Respectively represent the parallel and perpendicular dielectric constants (25 ℃, 1000 Hz); Δ ε represents the dielectric anisotropy (25 ℃, 1000 Hz); γ 1 represents rotational viscosity (mpa.s, 25 ℃); cp represents the clearing point (. degree. C.) of the liquid crystal composition; k11、K22、K33Respectively representing the splay, twist and bend elastic constants (pN, 25 ℃), KavgRepresents the average elastic constant (pN, 25 ℃, (K)11+K22+K33)/3)。
In the following examples, the group structures in the liquid crystal compounds are represented by codes shown in Table 1.
Table 1: radical structure code of liquid crystal compound
Figure BDA0002355425900000231
Take the following compound structure as an example:
Figure BDA0002355425900000241
expressed as: 5OMO2
Figure BDA0002355425900000242
Expressed as: 3CLWO2
In the following examples, the liquid crystal composition was prepared by a thermal dissolution method, comprising the steps of: weighing the liquid crystal compound by a balance according to the weight percentage, wherein the weighing and adding sequence has no specific requirements, generally weighing and mixing the liquid crystal compound in sequence from high melting point to low melting point, heating and stirring at 60-100 ℃ to uniformly melt all the components, filtering, performing rotary evaporation, and finally packaging to obtain the target sample.
In the following examples, the weight percentages of the components in the liquid crystal composition and the performance parameters of the liquid crystal composition are shown in the following tables.
Example 1
Table 2: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000243
Example 2
Table 3: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000244
Example 3
Table 4: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000251
Example 4
Table 5: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000252
Example 5
Table 6: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000253
Example 6
Table 7: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000254
Figure BDA0002355425900000261
Example 7
Table 8: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000262
Example 8
Table 9: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000263
Example 9
Table 10: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000264
Figure BDA0002355425900000271
Example 10
Table 11: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000272
Example 11
Table 12: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000273
Example 12
Table 13: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000274
Figure BDA0002355425900000281
Example 13
Table 14: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000282
Example 14
Table 15: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000283
Example 15
Table 16: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000284
Figure BDA0002355425900000291
Example 16
Table 17: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000292
Example 17
Table 18: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000293
Example 18
Table 19: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000294
Figure BDA0002355425900000301
Example 19
Table 20: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000302
Example 20
Table 21: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000303
Example 21
Table 22: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000304
Figure BDA0002355425900000311
Example 22
Table 23: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000312
Example 23
Table 24: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000313
Example 24
Table 25: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000314
Figure BDA0002355425900000321
Example 25
Table 26: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000322
Example 26
Table 27: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000323
Example 27
Table 28: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000324
Figure BDA0002355425900000331
Example 28
Table 29: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000332
Example 29
Table 30: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000333
Example 30
Table 31: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000334
Figure BDA0002355425900000341
Example 31
Table 32: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000342
Example 32
Table 33: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000343
Example 33
Table 34: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000344
Figure BDA0002355425900000351
Example 34
Table 35: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000352
Example 35
Table 36: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000353
Example 36
Table 37: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000354
Figure BDA0002355425900000361
Example 37
Table 38: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000362
Example 38
Table 39: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000363
Example 39
Table 40: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000364
Example 40
Table 41: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000365
Figure BDA0002355425900000371
EXAMPLE 41
Table 42: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000372
Example 42
Table 43: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000373
Example 43
Table 44: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000374
Figure BDA0002355425900000381
Example 44
Table 45: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000382
Example 45
Table 46: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000383
Example 46
Table 47: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000384
Figure BDA0002355425900000391
Example 47
Table 48: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000392
Example 48
Table 49: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000393
Example 49
Table 50: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000394
Example 50
Table 51: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000401
Example 51
Table 52: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000402
Example 52
Table 53: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000403
Example 53
Table 54: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000411
Example 54
Table 55: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000412
Example 55
Table 56: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000413
Example 56
Table 57: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000414
Figure BDA0002355425900000421
Comparative example 1
Table 58: the weight percentage and performance parameters of each component in the liquid crystal composition
Figure BDA0002355425900000422
The liquid crystal compositions obtained in example 1 and comparative example 1 were compared together for each of their performance parameter values, see Table 59.
Table 59: comparison of Performance parameters of liquid Crystal compositions
Item △n △ε Cp γ1 K11 K22 K33 Kavg
Example 1 0.108 -4.0 80 85 15.2 7.6 16.6 13.1
Comparative example 1 0.106 -3.6 80 88 13.8 6.9 15.3 12.0
By comparison, it can be seen that: compared with comparative example 1, the liquid crystal composition provided by example 1 has a larger elastic constant, and compared with comparative example 1, the elastic constant of example 1 is improved by about 10%, namely, the contrast ratio can be increased by about 10% when the liquid crystal composition is used in a liquid crystal display.
As can be seen from the above examples, the liquid crystal composition provided by the present invention has a large elastic constant, and can effectively improve the contrast of the liquid crystal display when used in IPS and FFS mode displays. Therefore, the liquid crystal composition provided by the invention is suitable for an IPS or FFS type TFT liquid crystal display device, can obviously improve the contrast of the liquid crystal display, and can improve the contrast characteristic of the IPS or FFS mode liquid crystal display.
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. A negative liquid crystal composition with large elastic constant is characterized by comprising at least one of compounds represented by a general formula I, at least one of compounds represented by a general formula II, at least one of compounds represented by a general formula III and at least one of compounds represented by a general formula IV;
Figure FDA0002355425890000011
wherein, in the general formula I, R1、R2Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a);
in the general formula II, R3、R4Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); n is1Represents 0 or 1; a. the1One selected from the following groups:
Figure FDA0002355425890000012
in the general formula III, R5、R6Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a);
in the general formula IV, R7、R8Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12Linear alkenyl of (A)2、A3Each independently represents trans-1, 4-cyclohexyl or 1, 4-phenylene.
2. The liquid crystal composition of claim 1, wherein the compound represented by formula I is selected from one or more compounds represented by formulae IA to IB:
Figure FDA0002355425890000013
Figure FDA0002355425890000021
wherein R is1、R2Each independently represents C1～C7Straight chain alkyl or C2～C7A linear alkenyl group of (a);
preferably, the compound represented by formula I is selected from one or more of the compounds represented by formula IA1 to formula IB 45:
Figure FDA0002355425890000022
Figure FDA0002355425890000031
Figure FDA0002355425890000041
Figure FDA0002355425890000051
more preferably, the compound represented by the general formula I is selected from one or more of IA3, IA12, IA21, IA23, IA24, IA25, IA39, IA43, IB3, IB5, IB8, IB10, IB26, IB27, IB30 and IB 31;
particularly preferably, the compound represented by the general formula I is selected from one or more of IA3, IA21, IA23, IA24, IA25, IA39, IA43, IB3, IB5, IB8, IB10, IB26, IB27, IB30 and IB 31;
most preferably, the compound represented by formula I is selected from one or more of IA3, IA21, IA23, IA39, IB3, IB5, IB8, IB10, IB26, IB27, IB30, IB 31.
3. The liquid crystal composition of claim 1 or 2, wherein the compound represented by formula II is selected from one or more compounds represented by formulae IIA to IIF:
Figure FDA0002355425890000052
wherein R is3、R4Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a);
preferably, the compound represented by the general formula II is one or more compounds selected from the group consisting of compounds represented by the formulas IIA 1-IIF 48:
Figure FDA0002355425890000061
Figure FDA0002355425890000071
Figure FDA0002355425890000081
Figure FDA0002355425890000091
Figure FDA0002355425890000101
Figure FDA0002355425890000111
Figure FDA0002355425890000121
more preferably, the compound represented by the general formula II is selected from one or more of IIA14, IIA16, IIA22, IIC14, IIC15, IID10, IID13, IID14, IID15, IID16, IID18, IIE14, IIE18, IIF13 and IIF 14.
4. The liquid crystal composition according to any one of claims 1 to 3, wherein the compound represented by the general formula III is one or more compounds selected from the group consisting of compounds represented by the formulae III1 to III 66:
Figure FDA0002355425890000122
Figure FDA0002355425890000131
Figure FDA0002355425890000141
Figure FDA0002355425890000151
preferably, the compound represented by the general formula III is selected from one or more of III54, III55, III56, III57 and III 63.
5. The liquid crystal composition according to any one of claims 1 to 4, wherein the compound represented by the general formula IV is one or more compounds selected from the group consisting of compounds represented by formulas IVA to IVC:
Figure FDA0002355425890000152
wherein R is7、R8Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a);
preferably, the compound represented by formula IV is selected from one or more of the compounds represented by formulae IVA1 to formula IVC 24:
Figure FDA0002355425890000153
Figure FDA0002355425890000161
Figure FDA0002355425890000171
more preferably, the compound represented by formula IV is selected from one or more of IVA3, IVA7, IVA11, IVA12, IVA25, IVA29, IVA31, IVA37, IVB18, IVB22, IVC2, IVC4, IVC15, IVC 20;
particularly preferably, the compound represented by formula IV is selected from one or more of IVA25, IVA29, IVA37, IVB18, IVB22, IVC2, IVC4, IVC15, and IVC 20.
6. The liquid crystal composition according to any one of claims 1 to 5, further comprising at least one of compounds represented by general formulae V and/or VI:
Figure FDA0002355425890000181
wherein, in the general formula V, R9、R10Each independently represents C1～C12Linear alkyl, linear alkoxy or C2～C12A linear alkenyl group of (a); a. the4Represents trans-1, 4-cyclohexyl or 1, 4-phenylene;
in the general formula VI, R11Represents C1～C7Straight chain alkyl or C2～C7A linear alkenyl group of (a); r12Represents C1～C7Linear alkyl or linear alkoxy of (a); l is1、L2、L3Each independently represents H or F.
7. The liquid crystal composition of claim 6, wherein the compound represented by formula V is one or more compounds selected from the group consisting of compounds represented by formulas VA to VB:
Figure FDA0002355425890000182
wherein R is9、R10Each independently represents C1～C7Linear alkyl, linear alkoxy or C2～C7A linear alkenyl group of (a);
preferably, the compound represented by formula V is selected from one or more of the compounds represented by formulae VA1 to VB 38:
Figure FDA0002355425890000183
Figure FDA0002355425890000191
Figure FDA0002355425890000201
8. the liquid crystal composition of claim 6 or 7, wherein the compound represented by formula VI is selected from one or more of VIA or VIB:
Figure FDA0002355425890000202
wherein R is11Represents C1～C7Straight chain alkyl or C2～C7A linear alkenyl group of (a); r12Represents C1～C7Linear alkyl or linear alkoxy of (a);
preferably, the compound represented by formula VI is selected from one or more of the compounds represented by formula VIA1 to formula VIB 24:
Figure FDA0002355425890000203
Figure FDA0002355425890000211
Figure FDA0002355425890000221
9. the liquid crystal composition according to any one of claims 1 to 8, wherein the liquid crystal composition comprises the following components in percentage by mass:
(1) 1-30% of a compound represented by the general formula I;
(2) 20-70% of a compound represented by the general formula II;
(3) 1-20% of a compound represented by the general formula III;
(4) 10-60% of a compound represented by the general formula IV;
(5) 0-20% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 30-66% of a compound represented by the general formula II;
(3) 2-16% of a compound represented by the general formula III;
(4) 15-55% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
more preferably, the following components are contained in percentage by mass:
(1) 4-16% of a compound represented by the general formula I;
(2) 36-63% of a compound represented by the general formula II;
(3) 3-12% of a compound represented by the general formula III;
(4) 19-47% of a compound represented by the general formula IV;
(5) 0-8% of a compound represented by general formula V and/or VI;
or the liquid crystal composition comprises the following components in percentage by mass:
(1) 3-12% of a compound represented by the general formula I;
(2) 30-62% of a compound represented by the general formula II;
(3) 2-15% of a compound represented by the general formula III;
(4) 25-55% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-12% of a compound represented by the general formula I;
(2) 36-58% of a compound represented by the general formula II;
(3) 3-12% of a compound represented by the general formula III;
(4) 27 to 47% of a compound represented by the general formula IV;
(5) 0-8% of a compound represented by general formula V and/or VI;
or the liquid crystal composition comprises the following components in percentage by mass:
(1) 7-20% of a compound represented by the general formula I;
(2) 30-65% of a compound represented by the general formula II;
(3) 2-15% of a compound represented by the general formula III;
(4) 15-50% of a compound represented by the general formula IV;
(5) 0 to 10% of a compound represented by the general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 7-16% of a compound represented by the general formula I;
(2) 36-63% of a compound represented by the general formula II;
(3) 3-12% of a compound represented by the general formula III;
(4) 19 to 46% of a compound represented by the general formula IV;
(5) 0-6% of a compound represented by general formula V and/or VI;
or the liquid crystal composition comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 45-65% of a compound represented by the general formula II;
(3) 2-15% of a compound represented by the general formula III;
(4) 15-47% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-16% of a compound represented by the general formula I;
(2) 45-63% of a compound represented by the general formula II;
(3) 3-11% of a compound represented by the general formula III;
(4) 19 to 43% of a compound represented by the general formula IV;
(5) 0-8% of a compound represented by general formula V and/or VI;
or the liquid crystal composition comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 33-55% of a compound represented by the general formula II;
(3) 2-15% of a compound represented by the general formula III;
(4) 25 to 50% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-16% of a compound represented by the general formula I;
(2) 36-55% of a compound represented by the general formula II;
(3) 3-12% of a compound represented by the general formula III;
(4) 27 to 47% of a compound represented by the general formula IV;
(5) 0-8% of a compound represented by general formula V and/or VI;
or the liquid crystal composition comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 33-65% of a compound represented by the general formula II;
(3) 2-7% of a compound represented by the general formula III;
(4) 15-50% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-16% of a compound represented by the general formula I;
(2) 36-63% of a compound represented by the general formula II;
(3) 3-7% of a compound represented by the general formula III;
(4) 19-47% of a compound represented by the general formula IV;
(5) 0-8% of a compound represented by general formula V and/or VI;
or the liquid crystal composition comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 33-65% of a compound represented by the general formula II;
(3) 5-15% of a compound represented by the general formula III;
(4) 15-50% of a compound represented by the general formula IV;
(5) 0-12% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-16% of a compound represented by the general formula I;
(2) 36-63% of a compound represented by the general formula II;
(3) 5-12% of a compound represented by the general formula III;
(4) 19-47% of a compound represented by the general formula IV;
(5) 0-7% of a compound represented by general formula V and/or VI;
or the liquid crystal composition comprises the following components in percentage by mass:
(1) 3-20% of a compound represented by the general formula I;
(2) 33-65% of a compound represented by the general formula II;
(3) 2-15% of a compound represented by the general formula III;
(4) 15-50% of a compound represented by the general formula IV;
preferably, the composition comprises the following components in percentage by mass:
(1) 5-16% of a compound represented by the general formula I;
(2) 36-63% of a compound represented by the general formula II;
(3) 3-12% of a compound represented by the general formula III;
(4) 19 to 46% of a compound represented by the general formula IV;
or the liquid crystal composition comprises the following components in percentage by mass:
(1) 3-15% of a compound represented by the general formula I;
(2) 33-58% of a compound represented by the general formula II;
(3) 2-9% of a compound represented by the general formula III;
(4) 25 to 50% of a compound represented by the general formula IV;
(5) 1-10% of a compound represented by general formula V and/or VI;
preferably, the composition comprises the following components in percentage by mass:
(1) 4-12% of a compound represented by the general formula I;
(2) 36-54% of a compound represented by the general formula II;
(3) 3-7% of a compound represented by the general formula III;
(4) 30-47% of a compound represented by the general formula IV;
(5) and 5-8% of a compound represented by the general formula V and/or VI.
10. Use of the liquid crystal composition according to any one of claims 1 to 9 in a liquid crystal display which is an IPS or FFS mode display.
CN202010006387.7A 2020-01-03 2020-01-03 Negative liquid crystal composition with large elastic constant and application thereof Withdrawn CN113072953A (en)

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