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Liquid crystal composition, polymer/liquid crystal composite material, optical element, compound

A technology of liquid crystal composition and compound, which is applied in liquid crystal materials, optics, organic chemistry, etc., and can solve problems such as large dielectric anisotropy

Active Publication Date: 2021-01-22
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] (6) Large dielectric anisotropy (Δε)

Method used

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  • Liquid crystal composition, polymer/liquid crystal composite material, optical element, compound
  • Liquid crystal composition, polymer/liquid crystal composite material, optical element, compound
  • Liquid crystal composition, polymer/liquid crystal composite material, optical element, compound

Examples

Experimental program
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Effect test

preparation example Construction

[0481] Composition (1) is prepared by a method such as dissolving desired components at high temperature. Depending on the application, additives may be added to the composition. Examples of additives are optically active compounds, polymerizable compounds, polymerization initiators, antioxidants, ultraviolet absorbers, light stabilizers, heat stabilizers, defoamers, pigments, and the like. Such additives are well known to those skilled in the art and are described in the literature.

[0482] Composition (1) may further contain at least one optically active compound. The optically active compound has an effect of preventing reverse twist by giving a desired twist angle (torsion angle) by generating a helical structure in the liquid crystal molecule. Preferable examples of the optically active compound include the following compound (K-1) to compound (K-16).

[0483]

[0484] Composition (1) adds such an optically active compound to adjust the helical pitch. In the case ...

Embodiment 1

[0647] 2-(4-(Difluoro-((2,3',4',5'-tetrafluoro-[1,1'-biphenyl]-4-yl)oxy)methyl)-3,5- Synthesis of Difluorophenyl)-5-(ethoxymethyl)-1,3-dioxane (No.148)

[0648]

[0649] The synthesis process is shown in the figure below.

[0650]

[0651] Step 1

[0652] Under nitrogen atmosphere, put triethyl methanetricarboxylate (0.90g, 8.5mmol), p-toluenesulfonic acid monohydrate (0.05g, 0.25mmol), acetone (27ml) into reaction vessel, stir at room temperature 12 hours. Triethylamine was added to the reaction mixture, and the solvent was distilled off with an evaporator. The residue was purified by silica gel chromatography to obtain compound (S102) (1.1 g, 7.8 mmol; 91%).

[0653] Step 2

[0654] Under nitrogen atmosphere, the compound (S102) (1.1g, 7.8mmol), sodium hydride (60%; 0.47g, 11.7mmol), and tetrahydrofuran (tetrahydrofuran, THF) (11ml) obtained in the first step were put into a reaction vessel , stirred at room temperature for 30 minutes. 1-Iodoethane (3.6 g, 23.4 ...

Embodiment 2

[0665] 5-(butoxymethyl)-2-(4-(difluoro-((2,3',4'-trifluoro-[1,1'-biphenyl]-4-yl)oxy)methyl Synthesis of -3,5-difluorophenyl)-1,3-dioxane (No.142)

[0666]

[0667] Compound (No. 142) was synthesized by a method similar to that of Example 1.

[0668] 1 H-NMR (δppm; CDCl 3 ):7.38-7.32(m,2H),7.25-7.10(m,2H),7.17-7.09(m,4H),5.39(s,1H),4.28(dd,2H,J=4.6Hz,11.8Hz) ,3.74(dd,2H,J=11.8Hz,11.8Hz),3.38(t,2H,J=6.6Hz),3.27(d,2H,J=5.8Hz),2.43(m,1H),1.57-1.50 (m,2H),1.36(dq,2H,J=7.5Hz,7.5Hz),0.93(t,3H,J=7.5Hz).

[0669] 19 F-NMR (δppm; CFCl 3 ):-61.40(t,2F,J=28.4Hz),-110.48(dt,2F,J=10.6Hz,28.4Hz),-115.14(dd,1F,J=8.5Hz,10.6Hz),-137.97- -138.07(m,1F),-139.25--139.35(m,1F).

[0670] The physical properties of the compound (No. 142) are as follows.

[0671] A mixture of the compound (15% by weight) and the mother liquid crystal (A) (85% by weight) was used as a sample. Based on these measured values, extrapolated values ​​were calculated and described in accordance with the above-men...

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Abstract

The invention provides a liquid crystal composition, a polymer / liquid crystal composite material, an optical element, and a compound, which meet the requirements of high stability to heat and light, high clearing point, low lower limit temperature of liquid crystal phase, low viscosity, and optical anisotropy At least one of physical properties such as suitable and large dielectric anisotropy. A compound represented by formula (1). In formula (1), for example, R 1 is an alkyl group with 1 to 12 carbons; ring A 1 , Ring A 2 and Ring A 3 is independently formula (2); X 1 and X 2 independently ‑O‑ or ‑CH 2 -; Y 1 is fluorine, ‑CF 3 or-OCF 3 ;Z 1 and Z 3 Independently a single bond, ‑CF 2 O‑or‑COO‑; Z 2 is a single bond, ‑CF 2 O‑or‑COO‑; L 1 and L 2 independently hydrogen or halogen; a is 0, 1, 2 or 3; n 1 and n 2 are independently 0, 1 or 2.

Description

technical field [0001] The invention relates to a liquid crystal compound, a polymer / liquid crystal composite material, an optical component and a compound. More specifically, it relates to a compound having an alkoxy group or an alkoxyalkyl group and a saturated 6-membered ring, a liquid crystal composition containing the compound and having a nematic phase, and a liquid crystal display device including the composition. Background technique [0002] Liquid crystal display elements are widely used in displays of personal computers, televisions, and the like. The element utilizes optical anisotropy, dielectric anisotropy, and the like of liquid crystal compounds. The operating modes of liquid crystal display elements are known: phase change (phase change, PC) mode, twisted nematic (twisted nematic, TN) mode, super twisted nematic (super twisted nematic, STN) mode, bistable twisted nematic (bistable twisted nematic (BTN) mode, electrically controlled birefringence (ECB) mode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D319/06C09K19/12C09K19/14C09K19/18C09K19/20C09K19/30C09K19/32C09K19/34C09K19/38C09K19/42C09K19/54G02F1/13
CPCC07D309/06C07D327/06C07D335/02C07D339/08C07D405/04C07D409/04C07D411/10C07D319/06C09K19/12C09K19/14C09K19/18C09K19/20C09K19/30C09K19/32C09K19/34C09K19/38C09K19/42C09K19/54G02F1/13C07C43/184C09K19/3402C09K19/3458C09K19/542C09K19/586C09K2019/3422G02F1/134309G02F2201/124
Inventor 大川裕树
Owner JNC CORP
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