CN112080288A - Liquid crystal composition, liquid crystal display element and liquid crystal display - Google Patents
Liquid crystal composition, liquid crystal display element and liquid crystal display Download PDFInfo
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- CN112080288A CN112080288A CN201910516664.6A CN201910516664A CN112080288A CN 112080288 A CN112080288 A CN 112080288A CN 201910516664 A CN201910516664 A CN 201910516664A CN 112080288 A CN112080288 A CN 112080288A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 134
- 239000000203 mixture Substances 0.000 title claims abstract description 110
- 150000001875 compounds Chemical class 0.000 claims abstract description 53
- 125000004432 carbon atom Chemical group C* 0.000 claims description 140
- 125000000217 alkyl group Chemical group 0.000 claims description 23
- 125000003545 alkoxy group Chemical group 0.000 claims description 21
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 19
- 125000003342 alkenyl group Chemical group 0.000 claims description 18
- 125000001995 cyclobutyl group Chemical group [H]C1([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 claims description 10
- 125000004979 cyclopentylene group Chemical group 0.000 claims description 10
- 125000004980 cyclopropylene group Chemical group 0.000 claims description 10
- -1 fluoro-1, 4-phenylene Chemical group 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 claims description 10
- 125000004955 1,4-cyclohexylene group Chemical group [H]C1([H])C([H])([H])C([H])([*:1])C([H])([H])C([H])([H])C1([H])[*:2] 0.000 claims description 8
- 125000001140 1,4-phenylene group Chemical group [H]C1=C([H])C([*:2])=C([H])C([H])=C1[*:1] 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 125000004429 atom Chemical group 0.000 claims description 2
- 230000000875 corresponding effect Effects 0.000 description 24
- 238000009472 formulation Methods 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 13
- 238000012360 testing method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000000178 monomer Substances 0.000 description 5
- 239000002019 doping agent Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 125000001495 ethyl group Chemical class [H]C([H])([H])C([H])([H])* 0.000 description 3
- 125000004776 1-fluoroethyl group Chemical group [H]C([H])([H])C([H])(F)* 0.000 description 2
- 125000004777 2-fluoroethyl group Chemical group [H]C([H])(F)C([H])([H])* 0.000 description 2
- 125000001028 difluoromethyl group Chemical group [H]C(F)(F)* 0.000 description 2
- 125000004216 fluoromethyl group Chemical group [H]C([H])(F)* 0.000 description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 2
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 2
- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 description 1
- 125000006039 1-hexenyl group Chemical group 0.000 description 1
- 125000006023 1-pentenyl group Chemical group 0.000 description 1
- 125000006017 1-propenyl group Chemical group 0.000 description 1
- UWCWUCKPEYNDNV-LBPRGKRZSA-N 2,6-dimethyl-n-[[(2s)-pyrrolidin-2-yl]methyl]aniline Chemical compound CC1=CC=CC(C)=C1NC[C@H]1NCCC1 UWCWUCKPEYNDNV-LBPRGKRZSA-N 0.000 description 1
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 description 1
- 125000006040 2-hexenyl group Chemical group 0.000 description 1
- 125000006024 2-pentenyl group Chemical group 0.000 description 1
- 125000004975 3-butenyl group Chemical group C(CC=C)* 0.000 description 1
- 125000006041 3-hexenyl group Chemical group 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000006612 decyloxy group Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000005446 heptyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003707 hexyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 125000002510 isobutoxy group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])O* 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000006606 n-butoxy group Chemical group 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000006611 nonyloxy group Chemical group 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000005447 octyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 125000004115 pentoxy group Chemical group [*]OC([H])([H])C([H])([H])C([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
- C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
Abstract
The disclosure relates to a liquid crystal composition, a liquid crystal display element comprising the liquid crystal composition and a liquid crystal display, and belongs to the field of liquid crystal display. The liquid crystal composition disclosed by the invention comprises the compound shown in the formula I and one or more compounds shown in the formula II, and the liquid crystal composition has improved response speed.
Description
Technical Field
The present disclosure relates to a liquid crystal composition, and more particularly, to a liquid crystal composition, a liquid crystal display element including the liquid crystal composition, and a liquid crystal display.
Background
Liquid crystal display elements are classified into the following modes according to display modes: twisted Nematic (TN) mode, Super Twisted Nematic (STN) mode, in-plane mode (IPS), Vertical Alignment (VA) mode. The following properties are required for the liquid crystal composition regardless of the display mode:
(1) the chemical and physical properties are stable; (2) the viscosity is low; (3) has a suitable dielectric Δ; (4) suitable refractive indices Δ n; (5) the mutual solubility with other liquid crystal compounds is good.
Early commercial TFT-LCD products basically adopted the TN display mode, and the biggest problem thereof was the narrow viewing angle. With the increase in the size of products, particularly in the application to the TV field, IPS display modes and VA display modes having a wide viewing angle characteristic are developed and applied in sequence.
In addition, liquid crystal media used for display elements such as FFS mode, IPS mode, and VA mode are not perfect, and liquid crystal materials used for display devices are required to have (i) low driving voltage: the liquid crystal material has proper negative dielectric anisotropy and elastic coefficient K; quick response: the liquid crystal material has proper rotational viscosity gamma 1 and elastic coefficient K; high reliability: high charge retention rate, high specific resistance value, excellent high-temperature stability, strict requirements on the stability of UV light or irradiation by conventional backlight illumination and the like. As the technology of LCD products is more and more updated, the requirement for the response speed of LCD products is higher and higher, and besides the device manufacturer increases the response speed by decreasing the cell thickness d, the response speed of our liquid crystal material is also required to be increased in practical applications. The response speed of the liquid crystal material in the prior art is limited by the rotational viscosity γ 1/elastic constant K of the liquid crystal, and therefore, it is necessary to reduce the rotational viscosity γ 1 of the liquid crystal medium and increase the elastic constant K to achieve the purpose of increasing the response time. In practical studies, it is found that the rotational viscosity and the elastic constant are a pair of contradictory parameters, and the reduction of the rotational viscosity and the reduction of the elastic constant cannot achieve the goal of reducing the response time. Therefore, it is a relatively troublesome problem to develop a liquid crystal composition having a faster response speed.
Disclosure of Invention
As a result of intensive studies to solve the problems of the prior art, the present inventors have surprisingly found that the response speed of a liquid crystal composition can be improved by using a liquid crystal composition containing a combination of the compound represented by the formula I and the compound represented by the formula II, and have completed the present disclosure.
Another object of the present disclosure is to provide a liquid crystal display device comprising the liquid crystal composition of the present disclosure, which has a fast response speed.
It is still another object of the present disclosure to provide a liquid crystal display comprising the liquid crystal composition of the present disclosure, which has a fast response speed.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
the present disclosure provides liquid crystal compositions comprising a compound of formula I, and one or more compounds of formula II,
in the formula II, R1、R2Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 3 to 8 carbon atoms, or a fluorine-substituted alkenyloxy group having 3 to 8 carbon atoms;
R1、R2any one or more of the radicals indicated being unconnected-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene;
x represents 0 or 1.
The "fluoro-substituted" in the above-mentioned fluoro-substituted alkyl group having 1 to 10 carbon atoms, fluoro-substituted alkoxy group having 1 to 10 carbon atoms, fluoro-substituted alkenyl group having 2 to 10 carbon atoms, and fluoro-substituted alkenyloxy group having 3 to 8 carbon atoms may be a monofluoro-substituted, or a polyfluoro-substituted, such as a difluoro-substituted, trifluoro-substituted, or a perfluoro-substituted group, and the number of fluoro-substituted groups is not particularly limited. Examples of the fluorine-substituted alkyl group having 1 to 10 carbon atoms include, but are not limited to, fluoromethyl, difluoromethyl, trifluoromethyl, 1-fluoroethyl, 2-fluoroethyl, 1, 2-difluoroethyl, 1,1, 2-trifluoroethyl, and 1,1,1,2, 2-pentafluoro-substituted ethyl.
The present disclosure also provides a liquid crystal display element comprising the liquid crystal composition of the present disclosure, the liquid crystal display element being an active matrix addressing display element or a passive matrix addressing display element.
The present disclosure also provides a liquid crystal display comprising the liquid crystal composition of the present disclosure, the liquid crystal display being an active matrix addressed display or a passive matrix addressed display.
Detailed Description
[ liquid Crystal composition ]
The liquid crystal composition disclosed by the invention comprises a compound shown as a formula I and one or more compounds shown as a formula II,
in the formula II, R1、R2Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 3 to 8 carbon atoms, or a fluorine-substituted alkenyloxy group having 3 to 8 carbon atoms;
R1、R2any one or more of the radicals indicated being unconnected-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene;
x represents 0 or 1.
Examples of the alkyl group having 1 to 10 carbon atoms include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, hexyl, heptyl, octyl, nonyl, decyl, and the like.
Examples of the alkoxy group having 1 to 10 carbon atoms include a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, a pentyloxy group, a hexyloxy group, a heptyloxy group, an octyloxy group, a nonyloxy group, and a decyloxy group.
Examples of the alkenyl group having 2 to 10 carbon atoms include a vinyl group, a 1-propenyl group, a 1-butenyl group, a 2-butenyl group, a 3-butenyl group, a 1-pentenyl group, a 2-pentenyl group, a 3-pentenyl group, a 4-pentenyl group, a 1-hexenyl group, a 2-hexenyl group, and a 3-hexenyl group.
The "fluoro-substituted" in the above-mentioned fluoro-substituted alkyl group having 1 to 10 carbon atoms, fluoro-substituted alkoxy group having 1 to 10 carbon atoms, fluoro-substituted alkenyl group having 2 to 10 carbon atoms, and fluoro-substituted alkenyloxy group having 3 to 8 carbon atoms may be a monofluoro-substituted, or a polyfluoro-substituted, such as a difluoro-substituted, trifluoro-substituted, or a perfluoro-substituted group, and the number of fluoro-substituted groups is not particularly limited. Examples of the fluorine-substituted alkyl group having 1 to 10 carbon atoms include, but are not limited to, fluoromethyl, difluoromethyl, trifluoromethyl, 1-fluoroethyl, 2-fluoroethyl, 1, 2-difluoroethyl, 1,1, 2-trifluoroethyl, and 1,1,1,2, 2-pentafluoro-substituted ethyl.
In the liquid crystal composition of the present disclosure, preferably, the compound represented by the above formula ii is selected from the group consisting of compounds represented by the following formulae ii-1 to ii-2:
wherein:
R1、R2each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 3 to 8 carbon atoms, or a fluorine-substituted alkenyloxy groupA substituted alkenyloxy group having 3 to 8 carbon atoms;
R1、R2any one or more of the radicals indicated being unconnected-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene.
In the liquid crystal composition of the present disclosure, preferably, one or more compounds represented by formula iii are further included:
in the formula III, R3、R4Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 3 to 8 carbon atoms, or a fluorine-substituted alkenyloxy group having 3 to 8 carbon atoms;
R3、R4any one or more of the radicals indicated being unconnected-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene;
Z1represents a single bond, -CH2CH2-or-CH2O-；
m represents 0 or 1; n represents 0, 1 or 2;
when m represents 1, n represents 0 or 1;
when m represents 0, n represents 2,2
Each independently represents 1, 4-phenylene or fluoro-1, 4-phenylene.
The aforementioned compound represented by the formula iii has negative dielectric anisotropy, and the driving voltage of the liquid crystal composition can be adjusted by containing the compound represented by the formula iii in the liquid crystal composition of the present disclosure.
In the liquid crystal composition of the present disclosure, preferably, the compound represented by the aforementioned formula iii is selected from the group consisting of compounds represented by the following formulae iii-1 to iii-9:
wherein:
R31、R41each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 3 to 8 carbon atoms, or a fluorine-substituted alkenyloxy group having 3 to 8 carbon atoms;
R31、R41any one or more of the radicals indicated being unconnected-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene.
The liquid crystal compositions of the present disclosure preferably further comprise one or more compounds of formula IV in addition to the compound of formula I:
wherein the content of the first and second substances,
R5、R6represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atomsAn alkenyl group;
By containing the compound shown in the formula IV in the liquid crystal composition, the intersolubility of the liquid crystal composition can be reduced, the rotational viscosity can be reduced, and the response speed of the liquid crystal composition can be improved.
In the liquid crystal composition of the present disclosure, preferably, the aforementioned compound represented by the formula IV other than the compound represented by the formula I is selected from the group consisting of the following compounds represented by the formulae IV-1 to IV-3:
wherein the content of the first and second substances,
R5、R6represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms.
The liquid crystal composition of the present disclosure preferably further comprises one or more compounds represented by formula v:
wherein the content of the first and second substances,
R7、R8each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms;
The liquid crystal composition disclosed by the invention contains the compound shown in the formula V, so that the response speed of the liquid crystal composition is improved.
In the liquid crystal composition of the present disclosure, preferably, the compound represented by the formula v is selected from the group consisting of compounds represented by the following formulas v-1 to v-3:
wherein the content of the first and second substances,
R7、R8each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms.
The liquid crystal composition of the present disclosure preferably further comprises one or more compounds represented by formula vi:
wherein the content of the first and second substances,
R9represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, any one or more of these groups being non-linked-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene;
R10represents an alkyl group having 1 to 10 atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or a fluorine-substituted alkoxy group having 1 to 10 carbon atoms;
x represents O or S.
By containing the compound shown in the formula VI in the liquid crystal composition, the liquid crystal composition has large negative dielectric anisotropy, and is favorable for reducing the driving voltage of a device.
In the liquid crystal composition of the present disclosure, the compound represented by the formula vi is preferably selected from the group consisting of compounds represented by the following formulae vi-1 to vi-12:
wherein R is91、R101Represents an alkyl group having 1 to 10 carbon atoms.
In the liquid crystal composition disclosed by the disclosure, the addition amount (mass ratio) of the compound shown in the formula I in the liquid crystal composition is 1-15%, preferably 5-10%; the addition amount (mass ratio) of the compound shown in the formula II in the liquid crystal composition is 1-20%, preferably 5-15%; the addition amount (mass ratio) of the compound shown in the formula III in the liquid crystal composition is 0-50%, preferably 25-40%; the adding amount (mass ratio) of the compound shown in the formula IV in the liquid crystal composition is 0-50%, and preferably 20-45%; the addition amount (mass ratio) of the compound shown in the formula V in the liquid crystal composition is 0-35%, preferably 5-25%; the compound represented by the formula VI is added to the liquid crystal composition in an amount (mass ratio) of 0 to 20%, preferably 3 to 15%.
In the liquid crystal composition of the present disclosure, a dopant having various functions may be optionally added, and when the liquid crystal composition contains a dopant, the content of the dopant is preferably 0.01 to 1.5% by mass in the liquid crystal composition, and examples of the dopant include an antioxidant, an ultraviolet absorber, and a chiral agent.
Examples of the ultraviolet absorber include,
t represents an integer of 1 to 10.
[ liquid Crystal display element or liquid Crystal display ]
The present disclosure also relates to a liquid crystal display element or a liquid crystal display comprising any of the above liquid crystal compositions; the display element or display is an active matrix display element or display or a passive matrix display element or display.
Optionally, the liquid crystal display element or the liquid crystal display is preferably an active matrix liquid crystal display element or a liquid crystal display.
Optionally, the active matrix display element or display is an IPS-TFT/FFS-TFT liquid crystal display element or display.
The liquid crystal display element or the liquid crystal display comprising the compound or the liquid crystal composition has a wider nematic phase temperature range, a faster response speed and a lower cell thickness.
Examples
In order to more clearly illustrate the disclosure, the disclosure is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the present disclosure.
In this specification, unless otherwise specified, the percentages refer to mass percentages, temperatures are in degrees centigrade (° c), and the specific meanings and test conditions of other symbols are as follows:
cp represents a liquid crystal clearing point (DEG C), and is measured by a DSC quantitative method;
Δ n represents optical anisotropy, noRefractive index of ordinary light, neThe refractive index of the extraordinary ray is measured under the conditions of 25 +/-2 ℃ and 589nm, and the Abbe refractometer is used for testing;
Δ represents dielectric anisotropy, Δ ═∥-⊥Wherein, in the step (A),∥is the dielectric constant parallel to the molecular axis,⊥dielectric constant perpendicular to the molecular axis, test conditions 25. + -. 0.5 ℃ 20 μm parallel box, INSTEC ALCT-IR1 test;
γ 1 represents rotational viscosity (mPa. multidot.s) at 25. + -. 0.5 ℃ in a 20 μm parallel cell INSTEC: ALCT-IR1 test;
k11 is a torsional elastic constant, K33 is a splay elastic constant, and the test conditions are as follows: at 25 ℃, INSTEC, ALCT-IR1 and 18 micron vertical box;
the preparation method of the liquid crystal composition comprises the following steps: weighing each liquid crystal monomer according to a certain proportion, putting the liquid crystal monomers into a stainless steel beaker, putting the stainless steel beaker filled with each liquid crystal monomer on a magnetic stirring instrument for heating and melting, adding a magnetic rotor into the stainless steel beaker after most of the liquid crystal monomers in the stainless steel beaker are melted, uniformly stirring the mixture, and cooling to room temperature to obtain the liquid crystal composition.
The liquid crystal monomer structure of the embodiment of the disclosure is represented by codes, and the code representation methods of the liquid crystal ring structure, the end group and the connecting group are shown in the following tables 1 and 2.
Corresponding code of the ring structure of Table 1
TABLE 2 corresponding codes for end groups and linking groups
Examples are:
Example 1
The formulation and corresponding properties of the liquid crystal compositions are shown in table 3 below.
TABLE 3 formulation and corresponding Properties of the liquid crystal composition of example 1
Example 2
The formulation and corresponding properties of the liquid crystal compositions are shown in table 5 below.
TABLE 5 formulation and corresponding Properties of the liquid crystal composition of example 2
Example 3
The formulation and corresponding properties of the liquid crystal compositions are shown in table 7 below.
TABLE 7 formulation and corresponding Properties of the liquid crystal composition of example 3
Example 4
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 8 below.
TABLE 8 formulation and corresponding Properties of the liquid crystal composition of example 4
Example 5
The formulation and corresponding properties of the liquid crystal compositions are shown in table 9 below.
TABLE 9 formulation and corresponding Properties of the liquid crystal composition of example 5
Example 6
The formulation and corresponding properties of the liquid crystal composition are shown in table 10 below.
TABLE 10 formulation and corresponding Properties of the liquid crystal composition of example 6
Example 7
The formulation and corresponding properties of the liquid crystal compositions are shown in table 12 below.
TABLE 12 formulation and corresponding Properties of the liquid crystal composition of example 7
Example 8
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 13 below.
TABLE 13 formulation and corresponding Properties of the liquid crystal composition of example 8
Comparative example 1
The formulation and corresponding properties of the liquid crystal compositions are shown in table 4 below.
TABLE 4 formulation and corresponding Properties of the comparative example 1 liquid Crystal composition
CC-3-2V in example 1 was replaced with CC-2-3, and the rest was the same as example 1 to prepare comparative example 1. The liquid crystal composition of example 1 had lower γ 1/K11 than comparative example 1, and it showed a faster response speed than comparative example 1.
Comparative example 2
The formulation and corresponding properties of the liquid crystal composition are shown in table 10 below.
TABLE 10 formulation and corresponding Properties of the liquid crystal composition of example 6
PYP-2-3 in example 6 was replaced with CYP-2-O2, the same as in example 6, as comparative example 2. The liquid crystal composition of example 6 had lower γ 1/K11 than comparative example 2, and it showed a faster response speed than comparative example 2.
Comparative example 3
The formulation and corresponding properties of the liquid crystal compositions are shown in table 12 below.
TABLE 12 formulation and corresponding Properties of the liquid crystal composition of example 7
PY-3-O2 in example 7 was replaced with CY-3-O2, and the same as in example 7 was repeated to prepare comparative example 3. The liquid crystal composition of example 7 had lower γ 1/K11 than comparative example 3, and it showed a faster response speed than comparative example 3.
It should be understood that the above-mentioned examples are for illustrative purposes only and are not intended to limit the embodiments of the present disclosure, and that various other modifications and changes in light thereof will be suggested to persons skilled in the art and are not intended to be exhaustive or to limit the present disclosure to the precise embodiments disclosed herein.
Claims (10)
1. A liquid crystal composition, which is characterized by comprising a compound shown as a formula I and one or more compounds shown as a formula II,
in the formula II, R1、R2Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 3 to 8 carbon atoms, or a fluorine-substituted alkenyloxy group having 3 to 8 carbon atoms;
R1、R2any one or more of the radicals indicated being unconnected-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene;
x represents 0 or 1.
2. The liquid crystal composition of claim 1, further comprising one or more compounds of formula III,
in the formula III, R3、R4Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 3 to 8 carbon atoms, or a fluorine-substituted alkenyloxy group having 3 to 8 carbon atoms;
R3、R4any one or more of the radicals indicated being unconnected-CH2-Optionally substituted with cyclopentylene, cyclobutyl, or cyclopropylene;
Z1represents a single bond, -CH2CH2-or-CH2O-；
m represents 0 or 1; n represents 0, 1 or 2;
when m represents 1, n represents 0 or 1;
when m represents 0, n represents 2,2
Each independently represents 1, 4-phenylene or fluoro-1, 4-phenylene.
3. The liquid crystal composition of claim 2, wherein the compound of formula iii is selected from the group consisting of compounds of formulae iii-1 to iii-9:
wherein:
R31、R41each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a fluorine-substituted alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 3 to 8 carbon atoms, or a fluorine-substituted alkenyloxy group having 3 to 8 carbon atoms;
R31、R41any one or more of the radicals indicated being unconnected-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene.
4. The liquid crystal composition according to any one of claims 1 to 3, further comprising one or more compounds represented by formula IV in addition to the compound represented by formula I:
in the formula IV, R5、R6Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms;
5. The liquid crystal composition of claim 4, wherein the compound of formula iv other than the compound of formula I is selected from the group consisting of compounds of formulae iv-1 to iv-3:
wherein the content of the first and second substances,
in the formulae IV-1 to IV-3, R5、R6Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms.
6. The liquid crystal composition of any one of claims 1 to 5, further comprising one or more compounds of formula V:
in formula V, R7、R8Each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms;
7. The liquid crystal composition of claim 6, wherein the compound of formula v is selected from the group consisting of compounds of formulae v-1 to v-3:
wherein the content of the first and second substances,
R7、R8each independently represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a fluorine-substituted alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or a fluorine-substituted alkenyl group having 2 to 10 carbon atoms.
8. The liquid crystal composition of any one of claims 1 to 7, further comprising one or more compounds of formula VI:
in formula VI, R9Represents an alkyl group having 1 to 10 carbon atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or a fluorine-substituted alkoxy group having 1 to 10 carbon atoms; r9Any one or more of the radicals indicated being unconnected-CH2-optionally substituted with cyclopentylene, cyclobutyl or cyclopropylene;
R10represents an alkyl group having 1 to 10 atoms, a fluorine-substituted alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or a fluorine-substituted alkoxy group having 1 to 10 carbon atoms;
x represents O or S.
9. The liquid crystal composition of claim 8, wherein the compound of formula vi is selected from the group consisting of compounds of formulae vi-1 to vi-12:
wherein R is91、R101Each independently represents an alkyl group having 1 to 10 carbon atoms.
10. A liquid crystal display element or a liquid crystal display comprising the liquid crystal composition according to any one of claims 1 to 9, wherein the liquid crystal display element or the liquid crystal display is an active matrix addressing display element or a display, or a passive matrix addressing display element or a display.
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