A kind of liquid-crystal compounds and liquid-crystal composition
阅读说明：本技术 一种液晶化合物及液晶组合物 (A kind of liquid-crystal compounds and liquid-crystal composition ) 是由 员国良 李明 孟劲松 梁志安 温刚 李正强 于 2018-05-25 设计创作，主要内容包括：本发明提供一种式I所示化合物,可以实现自配向功能。以及含有此类化合物的负性液晶组合物,及包含该化合物或液晶组合物的液晶显示元件或液晶显示器。式I所示化合物含有两个羟基,在面板ODF制程中,由于羟基与面板表面(玻璃表面、ITO电极表面)的分子间作用力,会自发的站立排列在面板玻璃或ITO透明电极基板上,促使接近式I所示化合物的液晶分子垂直排列,在UV光照射下,会在基板上聚合形成一层表面粗糙的聚合物,起到PI的绝缘与对液晶分子垂直配向的效果。(The present invention provides compound shown in a kind of Formulas I, may be implemented from orientation function.And the negative liquid crystal composition containing such compound, and liquid crystal display element or liquid crystal display comprising the compound or liquid-crystal composition.Compound shown in Formulas I is containing there are two hydroxyls, in panel ODF processing procedure, due to the intermolecular force of hydroxyl and panel surface (glass surface, ITO electrode surface), the spontaneous standing of meeting is arranged on face glass or ito transparent electrode substrate, the liquid crystal molecule of compound shown in proximity I is promoted to be arranged vertically, under the irradiation of UV light, polymerization the coarse polymer of layer of surface can be formed on substrate, play the insulation of PI and the effect to liquid crystal molecule vertical orientation.)
1. a kind of compound, as shown in formula I:
Wherein,
R0Indicate the alkane that alkyl, carbon atom number that alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 are 1-10 are 1-10 Alkenyl that alkoxy that oxygroup, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10, fluorine-substituted carbon atom number are The alkenyloxy that the alkenyloxy or fluorine-substituted carbon atom number that the alkenyl of 2-10, carbon atom number are 3-8 are 3-8, and R0Institute Show any one or more CH in group2Can be replaced by cyclopenta, cyclobutyl or cyclopropyl, any one or it is disjunct more A CH2It can be replaced by O；
Q indicates 1 or 2；
Alkyl that L each independently represents F, carbon atom number is 1-10 alkyl, fluorine-substituted carbon atom number are 1-10, carbon atom Alkenyl that alkoxy that alkoxy that number is 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10, fluorine replace Carbon atom number be 2-10 alkenyl, carbon atom number be 3-8 alkenyloxy or fluorine-substituted carbon atom number be 3-8 alkene Oxygroup, and any one or more CH2It can be replaced by cyclopenta, cyclobutyl or cyclopropyl；
P indicates that H or polymerizable groups, Sp indicate singly-bound or interval base；
X1、X2The alkylidene that expression atomicity is 1-10, and any one or more CH2It can be by cyclopenta, cyclobutyl or cyclopropyl Base replaces；Any one or disjunct multiple CH2It can be replaced by O；
Each independently represent one of cyclohexyl, cyclohexenyl group, oxacyclohexyl and/or phenyl or a variety of.
2. a kind of liquid-crystal composition, which is characterized in that include compound, II institute of one or more formulas shown in one or more formulas I Show compound shown in compound and one or more formulas III,
Wherein,
R0Indicate the alkane that alkyl, carbon atom number that alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 are 1-10 are 1-10 Alkenyl that alkoxy that oxygroup, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10, fluorine-substituted carbon atom number are The alkenyloxy that the alkenyloxy or fluorine-substituted carbon atom number that the alkenyl of 2-10, carbon atom number are 3-8 are 3-8, and R0Institute Show any one or more CH in group2Can be replaced by cyclopenta, cyclobutyl or cyclopropyl, any one or it is disjunct more A CH2It can be replaced by O；
Q indicates 1 or 2；
Alkyl that L each independently represents F, carbon atom number is 1-10 alkyl, fluorine-substituted carbon atom number are 1-10, carbon atom Alkenyl that alkoxy that alkoxy that number is 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10, fluorine replace Carbon atom number be 2-10 alkenyl, carbon atom number be 3-8 alkenyloxy or fluorine-substituted carbon atom number be 3-8 alkene Oxygroup, and any one or more CH2It can be replaced by cyclopenta, cyclobutyl or cyclopropyl；
P indicates that H or polymerizable groups, Sp indicate singly-bound or interval base；
X1、X2The alkylidene that expression atomicity is 1-10, and any one or more CH2It can be by cyclopenta, cyclobutyl or cyclopropyl Base replaces；Any one or disjunct multiple CH2It can be replaced by O；
Each independently represent one of cyclohexyl, cyclohexenyl group, oxacyclohexyl and/or phenyl or a variety of；
R1、R2、R3、R4Each independently represent alkyl that alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 are 1-10, Alkenyl that alkoxy that alkoxy that carbon atom number is 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10, The alkenyloxy or fluorine-substituted carbon atom number that alkenyl that fluorine-substituted carbon atom number is 2-10, carbon atom number are 3-8 are 3-8 Alkenyloxy, and R3、R4Any of shown group or multiple CH2It can be replaced by cyclopenta, cyclobutyl or cyclopropyl；
Z1、Z2Each independently represent singly-bound ,-CH2CH2Or-CH2O-；
It each independently represents
It each independently represents And/orOne of or it is a variety of；
M indicates 1,2；
N indicates 0,1,2.
3. liquid-crystal composition according to claim 2, which is characterized in that compound shown in one or more formulas I is One of compound shown in I 1- I 34 of formula or multiple compounds；Compound shown in one or more formulas II is II 1- II of formula One of compound or multiple compounds shown in 14；Compound shown in one or more formulas III is shown in III 1- III 11 of formula One of compound or multiple compounds,
Wherein, R3、R4Each independently represent alkyl that alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 are 1-10, Alkenyl that alkoxy that alkoxy that carbon atom number is 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10, The alkenyloxy or fluorine-substituted carbon atom number that alkenyl that fluorine-substituted carbon atom number is 2-10, carbon atom number are 3-8 are 3-8 Alkenyloxy, and R3、R4In any one or more CH2It can be replaced by cyclopenta, cyclobutyl or cyclopropyl.
4. liquid-crystal composition according to claim 2, which is characterized in that the liquid-crystal composition is negativity liquid crystal combination Object also includes one or more IV compounds represented of formula
Wherein, R5、R6Each independently represent alkyl that alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 are 1-10, Alkenyl that alkoxy that alkoxy that carbon atom number is 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10, The alkenyloxy or fluorine-substituted carbon atom number that alkenyl that fluorine-substituted carbon atom number is 2-10, carbon atom number are 3-8 are 3-8 Alkenyloxy, and R5、R6Any of shown group or multiple CH2It can be substituted by cyclopenta, cyclobutyl or cyclopropyl；
W indicates O, S or-CH2O-。
5. liquid-crystal composition according to claim 2 or 4, which is characterized in that the liquid-crystal composition also include it is a kind of or A variety of V compounds represented of formula
Wherein, R7、R8Each independently represent alkyl that alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 are 1-10, Alkenyl that alkoxy that alkoxy that carbon atom number is 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10, The alkenyloxy or fluorine-substituted carbon atom number that alkenyl that fluorine-substituted carbon atom number is 2-10, carbon atom number are 3-8 are 3-8 Alkenyloxy.
Each independently represent 1,4- phenylene, 1,4- cyclohexylidene, 1,4- cyclohexadienylidene.
6. liquid-crystal composition according to claim 2 or 4, which is characterized in that the liquid-crystal composition also include it is a kind of or A variety of VI polymerizable compounds of formula
Wherein,Each independently represent the phenylene or indanyl of phenylene, fluoro；
P1、P2、P3Each independently represent methacrylate or acrylate-based.
7. liquid crystal display element or liquid crystal display comprising any liquid-crystal compounds or liquid-crystal composition in claim 1-6 Device, the display element or display are active matrix display element or display or passive matrix display element or display.
8. liquid crystal display element according to claim 7 or liquid crystal display, it is characterised in that: the Active Matrix LCD At Element or display are the PSVA-TFT liquid crystal display element or display of no PI both alignment layers.
Technical field
Data field of liquid crystal display of the present invention, and in particular to a kind of liquid-crystal compounds and the liquid comprising the liquid-crystal compounds Brilliant composition, and include the display element or liquid crystal display of the liquid-crystal compounds or liquid-crystal composition.
Background technique
Liquid crystal media used in the display element of the active array addressing mode of VA mode etc., itself is simultaneously imperfect, such as Image retention level will be significantly worse than the display element of positive dielectric anisotropy, and the response time is slow, and driving voltage is relatively high equal scarce Point.At this point, some novel VA display technologies are quietly given birth to: as PSVA technology realizes the similar wide view angle of MVA/PVA Display pattern also simplifies CF technique, to improve aperture opening ratio while reducing CF cost, can also obtain higher bright Degree, and then obtain higher contrast.Further, since entire liquid crystal has pre-tilt angle, there is no domino delay phenomenon, is protecting The faster response time can also be obtained by holding under same driving voltage, image retention level will not be affected, but due to picture Fine Slit dense distribution electrode in element, therefore if electrode width cannot be uniformly distributed, it is easy to there is asking for display unevenness Topic.As UVVA technology, due to not having Slit structure in TFT side, pixel electrode occurs on the basis of keeping PSVA technical advantage Show that improvement is also obtained in uneven problem caused by width is uneven.Although display device is constantly developing, people are also wanted Have been devoted to study new liquid-crystal compounds, obtain so that liquid crystal media and its performance applied to display device constantly forward Development.
Polymerizable mesogenic unit (RMs) is currently the very popular and important project of display industry, the neck of possible application Domain includes polymer-stabilized alignment (PSA) liquid crystal display, (PS-BP) liquid crystal display of polymer stabilizing blue phase and graphical position phase Poor film (Pattern Retarder Film) etc..
PSA principle is just being used in different typical LC displays, for example, PSA-VA, PSA-OCB, PS-IPS/FFS and The liquid crystal displays such as PS-TN.By taking presently the most widely applied PSA-VA display as an example, liquid can be obtained by PSA method The pre-tilt angle of brilliant box, the pre-tilt angle have active influence to the response time.For PSA-VA display, standard can be used MVA or PVA pixel and electrode design, but if side electrode design using special graph and do not adopted in the other end It with the design of protrusion, can significantly simplify production, while display being made to obtain extraordinary contrast and very high light transmission Rate.
Summary of the invention
The present invention provides a kind of compound that may be implemented from orientation function, and the liquid crystal combination containing such compound Object, and liquid crystal display element or liquid crystal display comprising the compound or liquid-crystal composition, are particularly suitable for display or TV The PSVA liquid-crystal composition of application.
In order to realize above-mentioned advantageous effects, the present invention provides compounds shown in a kind of formula I:
Wherein,
R0Indicate the alkyl that alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 are 1-10, carbon atom number 1- Alkenyl that alkoxy that 10 alkoxy, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10, fluorine-substituted carbon are former The alkenyloxy that the alkenyloxy or fluorine-substituted carbon atom number that alkenyl that subnumber is 2-10, carbon atom number are 3-8 are 3-8, And R0Any one or more CH in shown group2It can be replaced by cyclopenta, cyclobutyl or cyclopropyl, any one or not phase Multiple CH even2It can be replaced by O；
Q indicates 1 or 2；
Alkyl that L each independently represents F, carbon atom number is 1-10 alkyl, fluorine-substituted carbon atom number are 1-10, carbon Alkenyl that alkoxy that alkoxy that atomicity is 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10, fluorine The alkenyloxy or fluorine-substituted carbon atom number that alkenyl that substituted carbon atom number is 2-10, carbon atom number are 3-8 are 3-8's Alkenyloxy, and any one or more CH2It can be replaced by cyclopenta, cyclobutyl or cyclopropyl；
P indicates that H or polymerizable groups, Sp indicate singly-bound or interval base；
X1、X2The alkylidene that expression atomicity is 1-10, and any one or more CH2Can by cyclopenta, cyclobutyl or Cyclopropyl replaces；Any one or disjunct multiple CH2It can be replaced by O；
Each independently represent one of cyclohexyl, cyclohexenyl group, oxacyclohexyl and/or phenyl or a variety of.
Compound shown in formula I has preferable solubility in a liquid crystal composition, and additive amount is general in a liquid crystal composition Between 0.5-5%, UV and rapid polymerization are easily absorbed, the polymer with orientation function can be formed.
There are two chain X for the tool of compound shown in formula I1、X2There are the hydroxyl of connection double anchoring bases (- OH) to pass through X1、X2With master Body ring structure is connected, and after ODF processing procedure, spontaneous to be arranged in panel surface, after UV illumination polymerization, formation is easily formed more stable Pre-tilt angle.
When P indicates polymerizable groups, preferred methacrylate base, acrylate-based, vinyl or Oxyranyle；
Be spaced basis representation chain-like groups, preferably carbon atom number be 1-10 branched-chain or straight-chain alkyl, and any one or not Connected multiple CH2It can be replaced by O, any one or more CH2It can be replaced with cyclopropyl, cyclobutyl or cyclopenta.
The present invention also provides a kind of liquid-crystal compositions, include compound, one shown in one or more formulas I described above Compound shown in compound shown in kind or a variety of formulas II and one or more formulas III,
Wherein,
R1、R2、R3、R4Each independently representing alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 is 1-10's The chain that alkoxy that alkoxy that alkyl, carbon atom number are 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10 The alkenyloxy or fluorine-substituted carbon atom number that alkenyl that alkenyl, fluorine-substituted carbon atom number are 2-10, carbon atom number are 3-8 For the alkenyloxy of 3-8, and R3、R4Any of shown group or multiple CH2It can be taken by cyclopenta, cyclobutyl or cyclopropyl Generation；
Z1、Z2Each independently represent singly-bound ,-CH2CH2Or-CH2O-；
It each independently represents
It each independently represents And/orOne of or it is a variety of；
M indicates 1,2；
N indicates 0,1,2.Compound shown in the formula I is preferably compound shown in I 1- I 34 of formula；One or more formulas Compound shown in II is preferably one of compound shown in II 1- II 14 of formula or multiple compounds；One or more formulas III Shown compound is preferably one of compound shown in III 1- III 11 of formula or multiple compounds,
Wherein, R3、R4Each independently representing alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 is 1-10's The chain that alkoxy that alkoxy that alkyl, carbon atom number are 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10 The alkenyloxy or fluorine-substituted carbon atom number that alkenyl that alkenyl, fluorine-substituted carbon atom number are 2-10, carbon atom number are 3-8 For the alkenyloxy of 3-8, and R3、R4In any one or more CH2It can be replaced by cyclopenta, cyclobutyl or cyclopropyl.
Liquid-crystal composition provided by the present invention has lower viscosity, quick response may be implemented, while having moderate Dielectric anisotropy Δ ε, moderate optical anisotropy Δ n (0.09-0.11), the high stability to light and heat.Include The liquid crystal display element or liquid crystal display of the liquid-crystal composition have wider nematic temperature range, suitable or higher Birefringence anisotropy Δ n, very high resistivity, good anti-ultraviolet property, high charge retention rate and low steam The performances such as pressure.
Compound shown in Formulas I contains there are two hydroxyl, in panel ODF processing procedure, due to hydroxyl with panel surface (glass table Face, ITO electrode surface) intermolecular force, can spontaneous standing be arranged on face glass or ito transparent electrode substrate, Promote the liquid crystal molecule of compound shown in proximity I to be arranged vertically, under the irradiation of UV light, polymerization can form one layer of table on substrate The coarse polymer in face, play the insulation of PI with to the effect of liquid crystal molecule vertical orientation, the thickness of PI 50nm-120nm it Between, condition of equivalent thickness is formed, so the additive amount of compound shown in Formulas I is larger, preferred (mass ratio) 1% or more, to it low Storage stability under temperature has higher requirements.
Using in these displays of these liquid-crystal compositions, compound shown in Formulas I is added in LC medium, and is being drawn After entering into LC box, applies between electrode and by UV photo polymerization or be crosslinked under voltage, the pre-dumping of liquid crystal molecule can be formed Tiltedly.Compound shown in Formulas I provided by the invention has many advantages, such as and other monomers intersolubility is good, ultraviolet light tolerance is good.Make Have good intersolubility, charge conservation rate (VHR) height, polymerization activity high (monomer residue is few) etc. excellent for reactive mesogen (RM) Point is very suitable for as vertical alignment materials and RM copolymerization for PSA (orientation that polymer is supported), PS (polymer stabilizing ) liquid crystal compound of pattern formula from orientation agent, the processing procedure of liquid crystal display panel can be kept greatly simplified to avoid PI processing procedure.
In addition, any one in the following product comprising compound shown in Formulas I, also belongs to protection scope of the present invention:
1) liquid-crystal composition；
2) optically anisotropic body of liquid-crystal composition；
Due to the difference of substituent group, the solubility property in liquid crystal can slightly have to be distinguished the type I compound, but can be real The additive amount of existing mass ratio 0.5%-5%.It is certain thick since the polymer that type I compound is formed will play the insulating effect of PI Degree is necessary, so type I compound will have enough dissolubilities.
The additive amount (mass ratio) of type I compound in a liquid crystal composition is preferably between 0.5%-5%, further preferably Between 1-3%.
The additive amount (mass ratio) of compound shown in the formula II in a liquid crystal composition preferably between 15-60%, into The preferred 20-40% of one step.
The additive amount (mass ratio) of compound shown in the formula III in a liquid crystal composition preferably between 20-60%, into The preferred 30-50% of one step.
The liquid-crystal composition can also include one or more IV compounds represented of formula
Wherein, R5、R6Each independently representing alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 is 1-10's The chain that alkoxy that alkoxy that alkyl, carbon atom number are 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10 The alkenyloxy or fluorine-substituted carbon atom number that alkenyl that alkenyl, fluorine-substituted carbon atom number are 2-10, carbon atom number are 3-8 For the alkenyloxy of 3-8, and R5、R6Any of shown group or multiple CH2It can be replaced by cyclopenta, cyclobutyl or cyclopropyl Generation；
W indicates O, S or-CH2O-。
IV compound represented of formula is preferred are as follows:
Wherein, R61Each independently representing carbon atom number is 2-6 alkyl.
The liquid-crystal composition also includes one or more V compounds represented of formula
Wherein, R7、R8Each independently representing alkyl, fluorine-substituted carbon atom number that carbon atom number is 1-10 is 1-10's The chain that alkoxy that alkoxy that alkyl, carbon atom number are 1-10, fluorine-substituted carbon atom number are 1-10, carbon atom number are 2-10 The alkenyloxy or fluorine-substituted carbon atom number that alkenyl that alkenyl, fluorine-substituted carbon atom number are 2-10, carbon atom number are 3-8 For the alkenyloxy of 3-8.
Each independently represent 1,4- phenylene, 1,4- cyclohexylidene, 1,4- cyclohexadienylidene.
V compound represented of formula is preferred are as follows:
Wherein, R71、R81Each independently represent the alkyl or alkenyl that carbon atom number is 2-6；R82 indicates that carbon atom number is The alkoxy of 1-5；The carbon atom number is that the alkenyl of 2-6 is preferably vinyl, 2- acrylic, 3- pentenyl.
This patent liquid-crystal composition can also include one or more VI polymerizable compounds of formula
Wherein,Each independently represent the phenylene or indanyl of phenylene, fluoro；
P1、P2、P3Each independently represent methacrylate or acrylate-based.
The preferably following compound of compound shown in formula VI:
VI compound of formula has biphenyl structural, slightly lower to UV sensibility relative to type I compound terphenyl structure, polymerization speed Degree is slightly slow, and it is opposite on surface layer to be actually formed VI compound of polymer.
VI compound of addition formula and type I compound are copolymerized, and can improve display effect, and polymeric layer provides continual and steady Pre-tilt, the pre-tilt of liquid crystal molecule are very beneficial for promoting the response speed of liquid crystal under the electric field.
VI compound additive amount of formula is generally between (mass ratio) 0.1-1%, preferably (mass ratio) 0.2-0.5%.
The different proportion of each ingredient of liquid-crystal composition can show slightly discrepant performance, such as dielectric anisotropy Δ ε, optical anisotropy Δ n, liquid crystal nematic phase be converted into transition temperature point CP, the low temperature stability inferior of liquid all can be poor It is different, but identical feature is its rotary viscosity that γ 1 is lower.Applied to liquid crystal display device, quick response may be implemented.Liquid crystal Composition has the high stability to light and heat.Liquid crystal display element or liquid crystal display comprising the liquid-crystal composition have It is wider nematic temperature range, suitable or higher birefringence anisotropy Δ n, very high resistivity, good The performances such as anti-ultraviolet property, high charge retention rate and low-steam pressure.The PSVA liquid crystal group applied suitable for display or TV Object is closed, especially after long-play, is not had or significantly reduced image retention (imagesticking).
The dopant of various functions can also be added in liquid-crystal compounds provided by the present invention, dopant content is preferred Between (mass ratio) 0.01-1%, these dopants are mainly antioxidant, ultraviolet absorbing agent, chiral agent.
Antioxidant, ultraviolet absorbing agent are preferred:
The integer of S expression 1-10.
The invention further relates to liquid crystal display elements or liquid crystal display comprising any one of the above liquid-crystal composition；It is described Display element or display are active matrix display element or display or passive matrix display element or display.
The liquid crystal display element or the preferred active array addressing liquid crystal display element of liquid crystal display or liquid crystal display.
The active matrix display element or display are specially PSVA-TFT or IPS-TFT liquid crystal display element or display Device.
Specific embodiment
The present invention is further elaborated combined with specific embodiments below, but the present invention is not limited to following embodiments.Institute State method is conventional method unless otherwise instructed.The raw material can be gotten from open business unless otherwise instructed.
For reaction process generally by the process of TLC monitoring reaction, the post-processing for reacting end is usually to wash, extract, closing And solvent being evaporated off under dry after organic phase, decompression, and recrystallization, column chromatography, those skilled in the art can be under The present invention is realized in the description in face.
Percentage in this specification is mass percent, and temperature is degree Celsius (DEG C), the specific meaning of other symbols and Test condition is as follows:
Cp indicates clearing point (DEG C), the test of DSC sizing technique；
S-N indicates the crystalline state of liquid crystal to nematic fusing point (DEG C)；
Δ n indicates optical anisotropy, Δ n=ne-no, noFor the refractive index of ordinary light, neFor the refraction of extraordinary ray Rate, test condition are 25 ± 2 DEG C, 589nm, Abbe refractometer test；
Δ ε indicates dielectric anisotropy, Δ ε=ε ∥-ε ⊥, wherein ε ∥ is the dielectric constant for being parallel to molecular axis, ε ⊥ For the dielectric constant perpendicular to molecular axis, test condition is 25 ± 0.5 DEG C, and 20 microns of parallel boxes, INSTEC:ALCT-IR1 is surveyed Examination；
γ 1 indicates rotary viscosity (mPas), and test condition is 25 ± 0.5 DEG C, 20 microns of parallel boxes, INSTEC:ALCT- IR1 test；
ρ indicate resistivity (Ω cm), test condition be 25 ± 2 DEG C, test equipment be TOYO SR6517 high resistant instrument and LE-21 liquid electrode.
VHR indicates voltage retention (%), and test condition is 20 ± 2 DEG C, voltage is ± 5V, pulse width 10ms, electricity Press retention time 16.7ms.Test equipment is TOYO Model6254 liquid crystal property comprehensive tester.
τ indicate response time (ms), test equipment be DMS-501, test condition be 25 ± 0.5 DEG C, testing cassete 3.3 Micron IPS testing cassete, electrode spacing and electrode width are 10 microns, and frictional direction and electrode angle are 10 °.
T (%) indicates transmitance, and T (%)=100%* illuminated state (Vop) brightness/light-source brightness, test equipment DMS501 are surveyed Strip part is 25 ± 0.5 DEG C, and testing cassete is 3.3 microns of IPS testing cassetes, and electrode spacing and electrode width are 10 microns, friction Direction and electrode angle are 10 °.
Compound shown in formula I can be prepared by following illustrative synthetic route:
R0, L be the definition that provides of claim 1.
R0It is preferred that n-propyl, n-pentyl, Cvclopropvlmethvl, the preferred F of L, methyl, ethyl.
The present patent application embodiment liquid crystal monomer structure indicates with code, liquid crystal ring structure, end group, linking group code Representation method see the table below (one), table (two) table (one): the correspondence code of ring structure
Table (two): the corresponding code of end group and the link group
Citing: