CN107779205A - A kind of liquid crystal compound with high positive dielectric anisotropy and its application - Google Patents
A kind of liquid crystal compound with high positive dielectric anisotropy and its application Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 240
- 150000001875 compounds Chemical class 0.000 title claims abstract description 224
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 45
- 239000000203 mixture Substances 0.000 claims abstract description 33
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 16
- 125000004786 difluoromethoxy group Chemical group [H]C(F)(F)O* 0.000 claims abstract description 10
- 125000003342 alkenyl group Chemical group 0.000 claims description 34
- 125000003545 alkoxy group Chemical group 0.000 claims description 34
- 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 claims description 24
- 125000000219 ethylidene group Chemical group [H]C(=[*])C([H])([H])[H] 0.000 claims description 22
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 claims description 8
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 7
- 239000012769 display material Substances 0.000 claims description 5
- 238000006467 substitution reaction Methods 0.000 claims description 5
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 claims description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 2
- -1 compound Compound Chemical class 0.000 claims 2
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims 1
- 238000002834 transmittance Methods 0.000 abstract description 11
- 230000004044 response Effects 0.000 description 31
- 239000000463 material Substances 0.000 description 27
- 238000005259 measurement Methods 0.000 description 23
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 description 16
- 0 *C(CC1)CC1C(CC1)CCC1c(cc1)ccc1-c1cc(*)c(C[I+]=[U](c2cc(*)c(*)c(*)c2)=C)cc1 Chemical compound *C(CC1)CC1C(CC1)CCC1c(cc1)ccc1-c1cc(*)c(C[I+]=[U](c2cc(*)c(*)c(*)c2)=C)cc1 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 150000001721 carbon Chemical group 0.000 description 4
- AHEJADDTUQLXKX-UHFFFAOYSA-N difluoromethoxyperoxy(difluoro)methane Chemical compound FC(F)OOOC(F)F AHEJADDTUQLXKX-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000004988 Nematic liquid crystal Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- UUFQTNFCRMXOAE-UHFFFAOYSA-N 1-methylmethylene Chemical compound C[CH] UUFQTNFCRMXOAE-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 230000026030 halogenation Effects 0.000 description 2
- 238000005658 halogenation reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- VDFVNEFVBPFDSB-UHFFFAOYSA-N 1,3-dioxane Chemical class C1COCOC1 VDFVNEFVBPFDSB-UHFFFAOYSA-N 0.000 description 1
- 239000004990 Smectic liquid crystal Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012069 chiral reagent Substances 0.000 description 1
- 230000003098 cholesteric effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002484 cyclic voltammetry Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- PYLWMHQQBFSUBP-UHFFFAOYSA-N monofluorobenzene Chemical compound FC1=CC=CC=C1 PYLWMHQQBFSUBP-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- 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
- G02F1/01—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
- G02F1/13—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
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- 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
- G02F1/01—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
- G02F1/13—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
- 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
- G02F1/13706—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 the liquid crystal having positive dielectric anisotropy
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- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Liquid Crystal Substances (AREA)
Abstract
The invention provides a kind of liquid crystal compound and its application.The liquid crystal compound includes the liquid-crystal compounds with formula I and formula II, and formula I isFormula II isAny one alkyl of wherein R for H or in the alkyl with 1 to 7 carbon atoms；X1、X2、X3And X4It is each independently selected from H or F；Y is F, Cl, CF3、OCF3Or OCHF2；WithIt is each independently selected from With
Description
Technical field
The present invention relates to liquid crystal compound and its application, belongs to liquid crystal material technical field.
Background technology
Since entry into video epoch, smart mobile phone, tablet personal computer to intelligent television, liquid crystal display is ubiquitous, liquid crystal
Display has become indispensable " milk and the bread " of information-intensive society.The fast development of liquid crystal display instead of biography
The CRT Displays of system, into the main product of current field of information display, this has also directly affected its important composition portion
Divide the fast development of liquid crystal material.
Liquid crystal media is partial order, anisotropic liquid, between three-dimensional order solid and isotropic liquid.
G.Friedel and F.Grand-jean of France etc. have done detailed research to the structure and optical property of liquid crystal, and in 1922
Year completes the work of liquid crystal classification, and liquid crystal is divided into：Smectic phase, nematic phase and cholesteric phase.G.H.Heilmeir is made
First liquid crystal display (LCD) in the world.T.L.Fergason in 1971 etc. proposes twisted nematic (Twisted
Nematic：TN) pattern, W.Helfrich and M.Schadt utilize the electrooptic effect and integrated circuit phase of twisted nematic liquid crystal
With reference to being made into display device, realized the industrialization of liquid crystal material, be still the liquid crystal of in the market most main flow at present
Show device pattern.
Liquid crystal display can be divided into passive matrix (also known as passive-matrix or simple matrix) and active matrix (based on also known as
Dynamic matrix) two kinds of type of drive.Wherein, AMLCD is to change the row of liquid-crystal compounds by applying voltage
Row mode, so as to change light emissive porwer that backlight sends to form image, due to its have high-resolution, high-contrast,
The characteristics of low-power, thin and light face, is increasingly favored by people.AMLCD is according to active device
Species can be divided into two types：Two poles of MOS (metal-oxide semiconductor (MOS)) or other on the silicon as substrate
Pipe；Thin film transistor (TFT) (Thin Film Transistor-TFT) on the glass plate as substrate.Wherein develop at present most
It is rapidly thin film transistor (TFT) TFT-LCD, has been obtained on the display devices such as mobile phone, computer, LCD TV and camera good
Good application, turn into the main product in current liquid crystal market.
As liquid crystal display is widely applied, the requirement to its performance is also constantly improving, in terms of high image quality
It is required that wider array of operating temperature, faster response speed, higher contrast, and power consumption requirements are more and more lower, it means that more
Low driving voltage, higher light transmittance, the raising of these performances all be unable to do without the improvement of liquid crystal material.
The content of the invention
Goal of the invention：It is existing to improve the invention provides a kind of liquid crystal compound and its application for above-mentioned technical problem
There is the characteristic such as the dielectric anisotropy of liquid crystal compound and coefficient of elasticity in technology.
Technical scheme：The invention discloses a kind of liquid crystal compound with positive dielectric constant, the liquid crystal compound bag
Include at least one with compounds of formula I and at least one with compounds of formula II；
The formula I is：
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；
X1、X2、X3And X4It is each independently selected from H or F；
Y is F, Cl, CF3、OCF3Or OCHF2；
WithIt is each independently selected from Any of group of composition；
The formula II is：
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；
X1、X2、X3And X4It is each independently selected from H or F；
Y is F, Cl, CF3、OCF3Or OCHF2；
WithIt is each independently selected from Any of group of composition.
It is preferred that in the formula I,WithIt is each independently selected from Any of；
It is preferred that in the formula II,WithIt is each independently selected from Any of.
According to another aspect of the present invention, there is provided a kind of above-mentioned liquid crystal compound is in liquid crystal display material or liquid crystal
Show the application in equipment.
In technical scheme, the liquid-crystal compounds with formula I and formula II is white under pure material state
, there is wider nematic phase, higher dielectric anisotropy △ ε values and coefficient of elasticity K.Wherein dielectric anisotropy △ ε values
Raising can reduce driving voltage, advantageously reduce energy consumption, it can in addition contain drop the low voltage drive response time, improve response
Speed；Coefficient of elasticity K raising is advantageous to improve the contrast and light transmittance of liquid crystal display, both improves image quality,
Be advantageous to save again, can preferably meet the performance requirement of liquid crystal display.Formula I and formula II liquid-crystal compounds it is another
Outstanding feature is when being combined with low viscosity polarity liquid-crystal compounds, and suitable optical characteristics can be obtained by being added with small amount.Cause
This liquid crystal compound being made up of formula I and formula II liquid-crystal compounds can be used for improving the response speed of liquid crystal material, drive
Dynamic voltage, light transmittance and contrast.
Another outstanding feature of formula I and formula II liquid-crystal compounds is combined with low viscosity polarity liquid-crystal compounds
When, suitable optical characteristics can be obtained by being added with small amount.Therefore the liquid being made up of formula I and formula II liquid-crystal compounds
Brilliant mixture can be used for response speed, driving voltage, light transmittance and the contrast for improving liquid crystal material.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to embodiment, the present invention is further detailed explanation.
Technique effect：Relative to prior art, liquid crystal compound provided by the invention have higher dielectric anisotropy value,
The nematic phase of wide temperature range and higher coefficient of elasticity K, high dielectric anisotropy value, be advantageous to improve liquid crystal display
Contrast and light transmittance, improve image quality simultaneously be advantageous to save.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.The present invention is described in detail below in conjunction with embodiment.
In a kind of typical embodiment of the present invention, there is provided a kind of liquid crystal compound, the liquid crystal compound include tool
There are formula I and formula II liquid-crystal compounds, formula I is：
Formula II is：
Any one alkyl of wherein R for H or in the alkyl with 1 to 7 carbon atoms；X1、X2、X3And X4It is each independent
Ground is selected from H or F；Y is F, Cl, CF3、OCF3Or OCHF2；WithIndependently of one another
It is selected fromAny of group of composition.
In technical scheme, the liquid-crystal compounds with formula I and formula II is white under pure material state
, there is wider nematic phase, higher dielectric anisotropy △ ε values and coefficient of elasticity K.
Wherein according to driving voltage formulaDriving voltage and dielectric anisotropy △ ε
Value is inversely proportional, and illustrates that dielectric anisotropy △ ε values are higher, then driving voltage is lower, is advantageous to save.Driven with reference to according to voltage
Response time formulaUnderstand, τonIt is inversely proportional with dielectric anisotropy △ ε values, illustrates dielectric anisotropy
△ ε values are higher, and the response time is lower, then response speed is faster.
In addition, according to response time formulaUnderstand, coefficient of elasticity K raising is favourable
In the response time for reducing liquid crystal material, increase response speed, the increase of coefficient of elasticity K values can also improve liquid crystal display
Contrast and light transmittance, both improve image quality, are advantageous to save again.Be advantageous to improve liquid crystal display contrast and
Light transmittance, both improves image quality, is advantageous to save again, can preferably meet the performance requirement of liquid crystal display.
Another outstanding feature of formula I and formula II liquid-crystal compounds is when being combined with Low-Viscosity Liquid-Crystal Compound, with
Small amount, which adds, can obtain suitable optical characteristics.Therefore the liquid crystal being made up of formula I and formula II liquid-crystal compounds mixes
Compound can be used for response speed, driving voltage, light transmittance and the contrast for improving liquid crystal material.In addition, those skilled in the art
Should be clear, abovementioned alkyl, which not only includes straight chained alkyl, also includes corresponding branched alkyl.
For above-mentioned achieved technique effect, the applicant is to realizing that the principle of above-mentioned technique effect is goed deep into
Inquire into, find：Polarity liquid-crystal compounds containing cyclopenta and difluoromethoxy ether link base, the wherein addition of cyclopenta can change
The ratio between the major axis of kind liquid-crystal compounds and short axle, improve its degree of order S values, make it have wider temperature range nematic phase,
Higher dielectric anisotropy △ ε values and coefficient of elasticity K, because K is proportional to S2, therefore coefficient of elasticity is had a great influence.
Meanwhile according to response time formulaUnderstand, high elastic coefficient K LCD compounds
The use of thing can be reduced effectively the response time of liquid crystal material, increase response speed, and the increase of coefficient of elasticity K values also helps
Improve the contrast and light transmittance of liquid crystal display, both improve image quality, be advantageous to save again.
In addition, according to driving voltage formulaDriving voltage and dielectric anisotropy △
ε values are inversely proportional, and illustrate that dielectric anisotropy △ ε values are higher, then driving voltage is lower, is advantageous to save.Driven with reference to according to voltage
Dynamic response time formulaUnderstand, τonIt is inversely proportional with dielectric anisotropy △ ε values, illustrates dielectric respectively to different
Property △ ε values are higher, and the response time is lower, then response speed is faster., can and then cyclopenta and difluoromethoxy ether link base junction are closed
Viscosity is further reduced, dielectric anisotropy is improved and widens liquid crystalline phase scope, these characteristics can preferably meet liquid crystal display
Performance requirements.
In order to further reduce the eutectic point of liquid crystal material, but keep higher dielectric anisotropy △ ε values and bullet
Property coefficient K, it is also necessary to add the difluoromethoxy ether chain with high dielectric anisotropy △ ε values of same type but different branched structures
Connect the polarity liquid-crystal compounds of base, the i.e. liquid-crystal compounds with formula II.Compound shown in formula II belongs to height with formula I
The liquid-crystal compounds of dielectric anisotropy △ ε values, backbone structure is consistent, and branched structure is different, is preparing high dielectric anisotropy
Liquid crystal compound when, the addition of this kind of liquid-crystal compounds is relatively more, only add an one kind easily cause low temperature precipitation, influence liquid
Brilliant display performance, therefore the eutectic characteristic that binding crystal material has, formula I and formula II collocation is used, can effectively be dropped
Low liquid crystal low temperature separates out problem, and reduce liquid crystal material uses lower limit temperature.In addition, LCD compound shown in formula I and formula II
Thing also has higher clearing point temperature, i.e. liquid crystal SC service ceiling temperature, therefore both combinations can be prepared with wider temperature
The nematic liquid crystal material of scope.
In order to obtain more particularly suitable liquid crystal width, higher dielectric anisotropy value, less rotary viscosity and suitable
Coefficient of elasticity K, be more beneficial for improving the response speed of liquid crystal material, reduce threshold voltage, improve the intersolubility of liquid crystal material,
In a kind of preferred embodiment of the application, preferably above-mentioned formula I is
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；Y is F, Cl, CF3、OCF3Or
OCHF2；X1、X2、X3、X4、X5、X6、X7And X8It is each independently selected from H or F.
In order to further reduce the synthesis of liquid-crystal compounds and use cost, preferred formula I is：
In order to obtain wide liquid crystalline phase scope, higher dielectric anisotropy value, less rotary viscosity and suitable bullet
Property coefficient K, it is more beneficial for improving the response speed of liquid crystal material, reduces threshold voltage, improve the intersolubility of liquid crystal material, at this
Apply in a kind of preferred embodiment, the formula II liquid-crystal compounds with positive dielectric constant is preferably with structure I I1 to II7
Compound.
Wherein, the II1 to II7 compound is：
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；Y is F, Cl, CF3、OCF3Or
OCHF2；X1、X2、X3、X4、X5、X6、X7And X8It is each independently selected from H or F.
Further preferably, the formula II is：
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；Y is F or OCF3；X1、X2Respectively
From independently selected from H or F.
With preferably when the liquid-crystal compounds with formula I of the application mixes with the liquid-crystal compounds with formula II
Intersolubility, for and other liquid-crystal compounds etc. species less-restrictive, be applicable to various liquid crystal corresponding with purpose
Mixture, it is particularly conducive to improve the bulk properties of liquid crystal compound；In addition, the liquid crystal compound have good UV, light and
Heat endurance.
Liquid crystal compound of the present invention can be prepared conventionally.Generally under high temperature by the desired amount of component with compared with
Low amounts is dissolved in the component for forming principal component；The solution of each component can also be mixed into organic solvent, for example, be mixed into acetone, chloroform or
In methanol, solvent is removed again after being sufficiently mixed, such as solvent is removed by distillation.
The species of existing liquid-crystal compounds is not restricted in the liquid crystal compound of the present invention, can select to appoint according to purpose
The liquid-crystal compounds for species of anticipating and the liquid crystal compound of the present invention form liquid crystal compound together.Also belonging to can adding as needed
Other additives of technical field.For example, 0~15% pleochroism dyestuff and/or chiral additives and/or stably can be added
Agent.
It following present some chiral reagents for being applied to adulterate above-mentioned liquid crystal compound：
Wherein, R be the halogenation or unsubstituted alkyl with 1 to 7 carbon atoms, alkoxy or alkenyl, art technology
Personnel are noted that abovementioned alkyl, alkoxy and alkenyl both can be straight chained alkyl, unbranched alkoxy, straight-chain alkenyl,
Can be alkyl, alkoxy and alkenyl with side chain.
Any one or more wherein in the preferably following material of stabilizer：
Wherein：R7It is described to state alkane for the halogenation or unsubstituted alkyl with 1~7 carbon atom, alkoxy or alkenyl
Base, alkoxy and alkenyl are alkyl, alkoxy or the alkenyl of straight or branched；
For Any of group of composition.It should be clear to a person skilled in the art that be above-mentioned
Alkyl, alkoxy and alkenyl both can be straight chained alkyl, unbranched alkoxy, straight-chain alkenyl or alkyl with side chain,
Alkoxy and alkenyl.
In a kind of preferred embodiment of the application, above-mentioned liquid crystal compound also include at least one polar compound and/
Or at least one non-polar compound.And positive polarity compound is preferably selected from one kind in compound shown in 1~III68 of formula III
Or it is a variety of, negative polarity compound is preferably selected from the one or more in compound shown in formula B1~B77, and non-polar compound is preferred
One or more in compound shown in 1~V29 of Formula V：
Wherein, the positive polarity compound with III1 to III68 is respectively：
The formula III 1 is into III68, R7For the alkyl with 1 to 7 carbon atoms, alkoxy, alkenyl or alkene alkoxy,
Wherein H or CH2It can be substituted by cyclopenta；R7Or cyclopenta or for 1 to 7 carbon atom alkyls, alkoxy or alkenyl substitution
Cyclopenta；It is described that there are 1 to 7 carbon atom alkyls to be preferably：-CH3、-C2H5、-C3H7、-C4H9、-C5H11、-C6H13Or-
C7H15；It is described there are 1 to 7 carbon atoms alkenyl be preferably：- CH=CH2,-CH=CHCH3,-CH=CHC2H5,-CH=
CHC3H7、-C2H4CH=CH2、-C2H4CH=CHCH3、-C3H6CH=CH2Or-C3H6CH=CHCH3；It is described that there are 1 to 7 carbon originals
Son alkoxy be preferably：-OCH3、-OC2H5、-OC3H7、-OC4H9、-OC5H11、-OC6H13Or-OC7H15；It is described to have 1 to 7
The alkene alkoxy of individual carbon atom is preferably：-OCH2CH=CH2、-OCH2CH=CHCH3Or-OCH2CH=CHC2H5, it is describedFor：
Liquid crystal compound with above-mentioned positive polarity compound is with higher dielectric anisotropy △ ε values, according to driving
Voltage equationDriving voltage is inversely proportional with dielectric anisotropy △ ε values, says
Bright dielectric anisotropy △ ε values are higher, then driving voltage is lower, is advantageous to save.Response time formula is driven according to voltageUnderstand, τonIt is inversely proportional with dielectric anisotropy △ ε values, illustrates that dielectric anisotropy △ ε values are higher, is rung
Lower between seasonable, then response speed is faster., can be with the dielectric of regulation system by adding the liquid-crystal compounds of above-mentioned opposed polarity
Anisotropy △ ε values, so as to the photoelectric characteristic of adjustable liquid crystal display mixture.
It is highly preferred that one or more of the positive polarity compound in the positive polarity compound shown in formula L1~L92, and
Positive polarity compound difference shown in formula L1~L92 is as follows：
In the formula L1~L92, R9For C1~C7 alkyl, C1~C7 alkoxies, C2~C7 alkenyls or C2~C7 alkene alcoxyls
Base, wherein H or CH2It can be substituted by cyclopenta；Or R9For cyclopenta；Or R9For by C1~C7 alkyl, C1~C7 alkoxies
Or the cyclopenta of C2~C7 alkenyls substitution；Preferably, in the 1~III68 of formula III, C1~C7 alkyl is-CH3、-C2H5、-
C3H7、-C4H9、-C5H11、-C6H13Or-C7H15；Preferably, in 1~III68 of formula III, C2~C7 alkenyls are-CH=CH2,-CH=
CHCH3,-CH=CHC2H5,-CH=CHC3H7、-C2H4CH=CH2、-C2H4CH=CHCH3、-C3H6CH=CH2Or-C3H6CH=
CHCH3；Preferably, in 1~III68 of formula III, C1~C7 alkoxies are：-OCH3、-OC2H5、-OC3H7、-OC4H9、-OC5H11、-
OC6H13Or-OC7H15；Preferably, in 1~III68 of formula III, C2~C7 alkene alkoxy is-OCH2CH=CH2、-OCH2CH=
CHCH3Or-OCH2CH=CHC2H5.It should be clear to a person skilled in the art that be abovementioned alkyl, alkoxy, alkenyl, alkene alkoxy
Both can be straight chained alkyl, unbranched alkoxy, straight-chain alkenyl, straight chain alkene alkoxy or alkyl, alcoxyl with side chain
Base, alkenyl and alkene alkoxy.
Wherein, the negative polarity compound with B1 to B77 is respectively：
Wherein, in the formula B1~B77, R3And R4Separately selected from C1~C7 alkyl, C1~C7 alkoxies, C2~
C7 alkenyls or C2~C7 alkene alkoxies, wherein H or CH2It can be substituted by cyclopenta；Or R3And R4It is separately cyclopenta；
R3And R4The separately cyclopenta to be substituted by C1~C7 alkyl, C1~C7 alkoxies or C2~C7 alkenyls；Preferably, institute
It is-CH to state C1~C7 alkyl3、-C2H5、-C3H7、-C4H9、-C5H11、-C6H13Or-C7H15；Preferably, C2~C7 alkenyls
For-CH=CH2,-CH=CHCH3,-CH=CHC2H5,-CH=CHC3H7、-C2H4CH=CH2、-C2H4CH=CHCH3、-C3H6CH
=CH2Or-C3H6CH=CHCH3；Preferably, C1~C7 alkoxies are-OCH3、-OC2H5、-OC3H7、-OC4H9、-
OC5H11、-OC6H13Or-OC7H15；Preferably, C2~C7 alkene alkoxy is-OCH2CH=CH2、-OCH2CH=CHCH3Or-
OCH2CH=CHC2H5；
The characteristics of liquid-crystal compounds of negative permittivity is that on molecular long axis direction there is larger dipole to make
With, thus corresponding dielectric constant is relatively large in vertically-oriented component, that is, has higher vertical dielectric constant ε⊥, liquid
Brilliant molecule tends to be distributed along perpendicular to direction of an electric field, thus shows relatively low pre-tilt angle, and negative type liquid crystal material is at edge
All it is to arrange on the horizontal level under electric field, pre-tilt angle distribution is uniform compared with eurymeric material, thus shows higher light and penetrate
Rate and wide viewing angle；The addition of the liquid-crystal compounds of other negative permittivity can improve the elasticity of flexure COEFFICIENT K of system33, so as to
Improve light in the penetrance of whole system, be advantageous to save, and be advantageous to improve contrast.
Wherein, the difference of compound shown in the 1~V29 of Formula V is as follows：
Wherein, in the 1~V29 of Formula V, R5And R6It is separately C1~C7 alkyl, C1~C7 alkoxies, C2~C7
Alkenyl or C2~C7 alkene alkoxies, wherein H or CH2It can be substituted by cyclopenta；Or R5And R6It is separately cyclopenta；Or
Person R5And R6The separately cyclopenta to be substituted by C1~C7 alkyl, C1~C7 alkoxies or C2~C7 alkenyls；Preferably,
In the 1~V29 of Formula V, C1~C7 alkyl is-CH3、-C2H5、-C3H7、-C4H9、-C5H11、-C6H13Or-C7H15；It is preferred that
Ground, in the 1~V29 of Formula V, C2~C7 alkenyls are-CH=CH2,-CH=CHCH3,-CH=CHC2H5,-CH=
CHC3H7、-C2H4CH=CH2、-C2H4CH=CHCH3、-C3H6CH=CH2Or-C3H6CH=CHCH3；Preferably, the Formula V 1~
In V29, C1~C7 alkoxies are-OCH3、-OC2H5、-OC3H7、-OC4H9、-OC5H11、-OC6H13Or-OC7H15；It is preferred that
Ground, in the 1~V29 of Formula V, C2~C7 alkene alkoxy is-OCH2CH=CH2、-OCH2CH=CHCH3Or-OCH2CH=
CHC2H5；
Nonpolar liquid-crystal compounds shown in above-mentioned 1~V20 of Formula V has relatively low rotary viscosity γ1, according to the response time
Knowable to formula,Response time and rotary viscosity γ1It is directly proportional, illustrate rotary viscosity
γ1Value is lower, and the response time is lower, then response speed is faster, can be by the liquid with above-mentioned nonpolar liquid-crystal compounds V1~V20
Brilliant mixture is used for the liquid crystal media for manufacturing quick response.Above-mentioned nonpolar liquid-crystal compounds V21~V27 has terphenyl knot
Structure, is advantageous to the optical anisotropy △ n values of increase system, and usual optical path difference d △ n value is prespecified, then △ n values
Higher, d values are lower, so that the response time of the liquid crystal compound with above-mentioned nonpolar liquid-crystal compounds V21~V27 is with more
Preferably value.Above-mentioned nonpolar liquid-crystal compounds V28~V29 has higher clearing point temperature, is mainly used in regulation system
TNIValue, so as to which the liquid crystal compound with above-mentioned nonpolar liquid-crystal compounds V28~V29 is advantageous to improve the use of liquid crystal media
Ceiling temperature, widen the operating temperature range of liquid crystal media.
Outstanding feature for the liquid crystal compound of the application is when being combined with Low-Viscosity Liquid-Crystal Compound, with small amount plus
Enter to obtain suitable optical characteristics, therefore the overall viscosity of liquid crystal compound can be reduced, increase response speed.It is preferred that liquid
The nonpolar liquid-crystal compounds of low viscosity that a kind of structural formula is V1 to V20 is at least added in brilliant mixture, further preferably extremely
The nonpolar liquid-crystal compounds that a kind of formula is V5 is added less, to obtain the liquid crystal compound of low viscosity, improves response speed.It is special
Preferably the liquid crystal compound is not applied in TN and IPS or FFS type liquid crystal display modes.
The content of liquid-crystal compounds in above-mentioned liquid crystal compound can be adjusted according to the performance requirement of liquid crystal material,
In a kind of preferred embodiment of the present invention, the weight content of the liquid-crystal compounds with formula I is in above-mentioned liquid crystal compound
0.1~75%, preferably 1~50%, further preferred 1~25%；The weight content of liquid-crystal compounds with formula II is 0.1
~75%, preferably 1~50%, further preferred 1~25%.Remaining composition can be added according to the above-mentioned teaching of the present invention
Add.In a word, the degree sum of composition is 100%.
In the application in another typical embodiment, there is provided a kind of above-mentioned liquid crystal compound is in liquid crystal display
In application.The liquid crystal compound of the application is applied in liquid crystal display material or liquid crystal display is prepared, can be notable
Improve the performance of liquid crystal display material or liquid crystal display.
Below with reference to embodiment and comparative example, beneficial effects of the present invention are further illustrated.
The following example be used for explain the present invention and it is unrestricted it, it is quality percentage that percentage is related in embodiment
Than, temperature with degree Celsius representing.Surveyed physico-chemical parameter represents as follows：TNIRepresent clearing point；Tm represents fusing point；△ n represent optics
Anisotropy (△ n=ne-no, 589nm, 25 DEG C of measurement temperature)；△ ε represent dielectric anisotropy (△ ε=ε∥-ε⊥, 25 DEG C)；
k11Represent Splay elastic constant (25 DEG C of measurement temperature)；γ1Rotary viscosity (25 DEG C of measurement temperature) is represented, and uses dsc measurement
TNI、Tm；Using abbe refractometers measurement △ n；Using CV measurements △ ε, k11And γ1。
In embodiments herein, each compound structure formula is in liquid crystal compound：
Wherein, a, b, c, d, e, f, g and h are each independently selected from 0,1,2,3 or 4.
Liquid crystal molecule main chain is named：HexamethyleneRepresented with initial letter C；Phenyl ringWith initial letter P
Represent；Single fluorobenzeneRepresented with PF；DifluorobenzeneRepresented with PFF；OxinaneRepresented with Py；
1,3- dioxanesRepresented with D；Difluoromethoxy ether bridged bond-CF2O- is represented with (CF2O).
Each compound side chain changes into chemical formula according to table 1 below, wherein, group CnH2n+1And CmH2m+1It is that there is n respectively
With the straight chained alkyl of m carbon atom, CpRepresent cyclopenta, CnH2n+1CpRepresent the cyclopenta with n carbon atom straight chain alkyl.Name
When main chain preceding, side chain is rear, such asRepresented with CPP2FF,With
PPFF (CF2O) PCpFFF expressions,Represented with CPFF (CF2O) PCpFFF,Represented with PPFPFF (CF2O) PCpFFF,
Represented with CPPC33,Represented with CCP32,With PPFP2Cp tables
Show,Represented with CCPFF3O2.
In addition, liquid-crystal compoundsRepresented with 3HHV；With VHHP1 tables
Show；Represented with CC31D1；Represented with ECCP3FFF；Represented with PPFFP23.
Table 1
| Code | R1 | R2 | X1 | X2 | X3 |
| nm | CnH2n+1 | CmH2m+1 | H | H | H |
| nF | CnH2n+1 | F | H | H | H |
| nFF | CnH2n+1 | F | F | H | H |
| nFFF | CnH2n+1 | F | F | F | H |
| nOTF | CnH2n+1 | OCF3 | H | H | H |
| nTF | CnH2n+1 | CF3 | H | H | H |
| Cpm | Cp | CmH2m+1 | H | H | H |
| CpF | Cp | F | H | H | H |
| CpFF | Cp | F | F | H | H |
| CpFFF | Cp | F | F | F | H |
| nCpm | CnH2n+1Cp | CmH2m+1 | H | H | H |
| nCpF | CnH2n+1Cp | F | H | H | H |
| nCpFF | CnH2n+1Cp | F | F | H | H |
| nCpFFF | CnH2n+1Cp | F | F | F | H |
| nOm | CnH2n+1 | OCmH2m+1 | F | H | F |
Embodiment 1
The liquid crystal compound composition and measurement parameter of embodiment 1 are shown in Table 2.
Table 2
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 2
The liquid crystal compound composition and measurement parameter of embodiment 2 are shown in Table 3.
Table 3
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 3
The liquid crystal compound composition and measurement parameter of embodiment 3 are shown in Table 4.
Table 4
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 4
The liquid crystal compound composition and measurement parameter of embodiment 4 are shown in Table 5.
Table 5
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 5
The liquid crystal compound composition and measurement parameter of embodiment 5 are shown in Table 6.
Table 6
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 6
The liquid crystal compound composition and measurement parameter of embodiment 6 are shown in Table 7.
Table 7
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 7
The liquid crystal compound composition and measurement parameter of embodiment 7 are shown in Table 8.
Table 8
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 8
The liquid crystal compound composition and measurement parameter of embodiment 8 are shown in Table 9.
Table 9
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 9
The liquid crystal compound composition and measurement parameter of embodiment 9 are shown in Table 10.
Table 10
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 10
The liquid crystal compound composition and measurement parameter of embodiment 10 are shown in Table 11.
Table 11
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 11
The liquid crystal compound composition and measurement parameter of embodiment 11 are shown in Table 12.
Table 12
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 12
The liquid crystal compound composition and measurement parameter of embodiment 12 are shown in Table 13.
Table 13
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 13
The liquid crystal compound composition and measurement parameter of embodiment 13 are shown in Table 14.
Table 14
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 14
The liquid crystal compound composition and measurement parameter of embodiment 14 are shown in Table 15.
Table 15
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Embodiment 15
The liquid crystal compound composition and measurement parameter of embodiment 15 are shown in Table 16.
Table 16
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component II is to have to lead in claim 1
The liquid-crystal compounds of Formula II；Component III is other liquid-crystal compounds；
Comparative example 1
The liquid crystal compound composition and measurement parameter of comparative example 1 are shown in Table 23.
Table 23
Note：Component I is the liquid-crystal compounds for having in claim 1 formula I；Component III is other liquid-crystal compounds；
Comparative example 2
The liquid crystal compound composition and measurement parameter of comparative example 2 are shown in Table 24.
Table 24
Note：Component II is the liquid-crystal compounds for having in claim 1 formula II；Component III is other liquid-crystal compounds；
Wherein, the component 2 in embodiment 15 is instead of in comparative example 1 with component 1；Reality instead of with component 2 in comparative example 2
Apply the component 1 in example 15.
From above-described embodiment it can be found that formula I liquid-crystal compounds and formula II combine obtained liquid crystal compound spy
Be not advantageous to the dielectric anisotropy value of raising system, so as to reduce driving voltage, be advantageous to save.The other liquid crystal compound
Nematic phase (T with wider temperature rangemTemperature is to TNITemperature), therefore the liquid crystal display material prepared with the liquid crystal compound
Material can be stored and used within the scope of wider temperature.The liquid crystal compound also has higher elasticity values, is advantageous to change
The contrast and light transmittance of kind liquid crystal display.It is full and the characteristic of the liquid crystal compound can be adjusted in wider scope
The performance requirement of the more liquid crystal materials of foot.
By the contrast of embodiment 15 and comparative example 1 and comparative example 2 it can be found that be used alone the compound of formula 1 or
When 2 compound of formula is used alone, the T of liquid crystal compoundmIt increased, illustrate that only adding one kind easily causes low temperature precipitation,
Liquid crystal display performance is influenceed, therefore formula I and formula II collocation will be used, liquid crystal low temperature can be effectively reduced and separate out problem, drop
Low liquid crystal material uses lower limit temperature.In addition, liquid-crystal compounds shown in formula I and formula II also has higher clearing point temperature
Degree, i.e. liquid crystal SC service ceiling temperature, therefore both combinations can prepare the nematic liquid crystal material with more wide temperature range.
When combinations of the formula I with formula 2 and other variety classes liquid-crystal compounds mix, it can obtain having height limpid
Point, the liquid crystal compound compared with low viscosity and higher dielectric anisotropy, especially with the nonpolar LCD compound with formula V5
When thing mixes, the liquid crystal compound of low viscosity can be obtained, the liquid crystal media available for manufacture quick response.Above-mentioned measurement parameter
The physico-chemical property of all liquid-crystal compounds with forming liquid crystal media is relevant, and liquid crystal compound of the invention is mainly used in adjusting body
The liquid crystal parameter of system.
Though the claimed all liquid crystal compounds of the non-limit of the present invention, those skilled in the art will envision that
It is on the basis of published above-described embodiment, only in conjunction with the specialty of itself to attempt that it can be obtained with similar reaction scheme
His similar compound is without paying creative work.Herein because length is limited, representational embodiment is only enumerated.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of liquid crystal compound with positive dielectric constant, it is characterised in that the liquid crystal compound includes at least one tool
There are compounds of formula I and at least one that there is compounds of formula II；
The formula I is：
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；
X1、X2、X3And X4It is each independently selected from H or F；
Y is F, Cl, CF3、OCF3Or OCHF2；
It is each independently selected from Any of group of composition；
The formula II is：
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；
X1、X2、X3And X4It is each independently selected from H or F；
Y is F, Cl, CF3、OCF3Or OCHF2；
It is each independently selected from Any of group of composition.
2. liquid crystal compound according to claim 1, it is characterised in that described to be selected from compounds of formula I：
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；Y is F, Cl, CF3、OCF3Or
OCHF2；X1、X2、X3、X4、X5、X6、X7And X8It is each independently selected from H or F.
3. liquid crystal compound according to claim 1, it is characterised in that described to be selected from compounds of formula I：
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；Y is F or OCF3；X1、X2Each solely
On the spot it is selected from H or F.
4. liquid crystal compound according to claim 1, it is characterised in that described to be selected from compounds of formula II：
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；Y is F, Cl, CF3、OCF3Or
OCHF2；X1、X2、X3、X4、X5、X6、X7And X8It is each independently selected from H or F.
5. liquid crystal compound according to claim 1, it is characterised in that described to be selected from compounds of formula II：
Wherein, any one alkyl in R H or alkyl with 1 to 7 carbon atoms；Y is F or OCF3；X1、X2Each solely
On the spot it is selected from H or F.
6. liquid crystal compound according to claim 1, it is characterised in that there is formula I described in the liquid crystal compound
Compound weight content be 0.1~75%, the weight content with compounds of formula II be 0.1~75%.
7. liquid crystal compound according to claim 1, it is characterised in that the liquid crystal compound also includes at least one pole
Property compound and/or at least one non-polar compound.
8. liquid crystal compound according to claim 7, it is characterised in that state polar compound for positive polarity compound and/
Or negative polarity compound, and one or more of the positive polarity compound in compound shown in 1~III68 of formula III, institute
One or more of the negative polarity compound in compound shown in formula B1~B77 are stated, the non-polar compound is selected from Formula V 1
One or more in compound shown in~V29；
Wherein, the positive polarity compound with III1~III68 is respectively：
The formula III 1 is into III68, R7For the alkyl with 1 to 7 carbon atoms, alkoxy, alkenyl or alkene alkoxy, wherein H
Or CH2It can be substituted by cyclopenta；R7Or cyclopenta or the ring for 1 to 7 carbon atom alkyls, alkoxy or alkenyl substitution
Amyl group；It is described that there are 1 to 7 carbon atom alkyls to be preferably：-CH3、-C2H5、-C3H7、-C4H9、-C5H11、-C6H13Or-C7H15；
It is described there are 1 to 7 carbon atoms alkenyl be preferably：- CH=CH2,-CH=CHCH3,-CH=CHC2H5,-CH=CHC3H7、-
C2H4CH=CH2、-C2H4CH=CHCH3、-C3H6CH=CH2Or-C3H6CH=CHCH3；The alkane with 1 to 7 carbon atoms
Epoxide is preferably：-OCH3、-OC2H5、-OC3H7、-OC4H9、-OC5H11、-OC6H13Or-OC7H15；It is described that there are 1 to 7 carbon originals
Son alkene alkoxy be preferably：-OCH2CH=CH2、-OCH2CH=CHCH3Or-OCH2CH=CHC2H5, it is described
For：
Wherein, the negative polarity compound with B1 to B77 is respectively：
Wherein, in the formula B1~B77, R3And R4Separately selected from C1~C7 alkyl, C1~C7 alkoxies, C2~C7 alkene
Base or C2~C7 alkene alkoxies, wherein H or CH2It can be substituted by cyclopenta；Or R3And R4It is separately cyclopenta；R3With
R4The separately cyclopenta to be substituted by C1~C7 alkyl, C1~C7 alkoxies or C2~C7 alkenyls；Preferably, the C1
~C7 alkyl is-CH3、-C2H5、-C3H7、-C4H9、-C5H11、-C6H13Or-C7H15；Preferably, C2~C7 alkenyls are-CH
=CH2,-CH=CHCH3,-CH=CHC2H5,-CH=CHC3H7、-C2H4CH=CH2、-C2H4CH=CHCH3、-C3H6CH=CH2
Or-C3H6CH=CHCH3；Preferably, C1~C7 alkoxies are-OCH3、-OC2H5、-OC3H7、-OC4H9、-OC5H11、-
OC6H13Or-OC7H15；Preferably, C2~C7 alkene alkoxy is-OCH2CH=CH2、-OCH2CH=CHCH3Or-OCH2CH=
CHC2H5；
Wherein, the difference of compound shown in the 1~V29 of Formula V is as follows：
Wherein, in the 1~V29 of Formula V, R5And R6It is separately C1~C7 alkyl, C1~C7 alkoxies, C2~C7 alkenyls
Or C2~C7 alkene alkoxies, wherein H or CH2It can be substituted by cyclopenta；Or R5And R6It is separately cyclopenta；Or R5
And R6The separately cyclopenta to be substituted by C1~C7 alkyl, C1~C7 alkoxies or C2~C7 alkenyls；Preferably, it is described
In 1~V29 of Formula V, C1~C7 alkyl is-CH3、-C2H5、-C3H7、-C4H9、-C5H11、-C6H13Or-C7H15；Preferably, institute
State in 1~V29 of Formula V, C2~C7 alkenyls are-CH=CH2,-CH=CHCH3,-CH=CHC2H5,-CH=CHC3H7、-
C2H4CH=CH2、-C2H4CH=CHCH3、-C3H6CH=CH2Or-C3H6CH=CHCH3；Preferably, in the 1~V29 of Formula V, institute
It is-OCH to state C1~C7 alkoxies3、-OC2H5、-OC3H7、-OC4H9、-OC5H11、-OC6H13Or-OC7H15；Preferably, the formula
In V1~V29, C2~C7 alkene alkoxy is-OCH2CH=CH2、-OCH2CH=CHCH3Or-OCH2CH=CHC2H5；
Preferably, the non-polar compound is the compound shown in Formula V 5.
9. liquid crystal compound according to claim 8, it is characterised in that the positive polarity compound is formula L1~L92 institutes
One or more in the positive polarity compound shown, wherein, the positive polarity compound difference shown in the formula L1~L92 is as follows：
In the formula L1~L92, R9For C1~C7 alkyl, C1~C7 alkoxies, C2~C7 alkenyls or C2~C7 alkene alkoxies, its
Middle H or CH2It can be substituted by cyclopenta；Or R9For cyclopenta；Or R9For by C1~C7 alkyl, C1~C7 alkoxies or C2
The cyclopenta of~C7 alkenyls substitution；Preferably, in the 1~III68 of formula III, C1~C7 alkyl is-CH3、-C2H5、-
C3H7、-C4H9、-C5H11、-C6H13Or-C7H15；Preferably, in the 1~III68 of formula III, C2~C7 alkenyls are-CH=
CH2,-CH=CHCH3,-CH=CHC2H5,-CH=CHC3H7、-C2H4CH=CH2、-C2H4CH=CHCH3、-C3H6CH=CH2Or-
C3H6CH=CHCH3；Preferably, in the 1~III68 of formula III, C1~C7 alkoxies are：-OCH3、-OC2H5、-
OC3H7、-OC4H9、-OC5H11、-OC6H13Or-OC7H15；Preferably, in the 1~III68 of formula III, C2~C7 alkene alcoxyl
Base is-OCH2CH=CH2、-OCH2CH=CHCH3Or-OCH2CH=CHC2H5。
10. the answering in liquid crystal display material or liquid crystal display of the liquid crystal compound any one of claim 1 to 9
With.
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