Liquid crystal compound and liquid crystal composition containing same, and liquid crystal display device

A liquid crystal compound and liquid crystal composition technology, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of unfavorable construction reaction speed, small use temperature range, high viscosity, etc., and achieve a wide nematic phase temperature range, Effect of Short Response Time, Low Threshold Voltage

Pending Publication Date: 2021-10-22
JIANGSU HECHENG ADVANCED MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0019] Although these fluorodibenzo compounds have a large absolute value of dielectric anisotropy, they have the problems of high viscosity and small operatin

Method used

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  • Liquid crystal compound and liquid crystal composition containing same, and liquid crystal display device
  • Liquid crystal compound and liquid crystal composition containing same, and liquid crystal display device
  • Liquid crystal compound and liquid crystal composition containing same, and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0204] Example 1

[0205] The synthetic route of Compound I-1-1 is as follows:

[0206]

[0207] Step 1. Preparation of compounds of formula B-3

[0208] 160 g of the compound of formula B-1 ((4-ethoxy-2,3-difluorophenyl) boric acid), 160.5 g of formula B-2 (2-bromo-6-fluorophenol) was added to a 3l reaction bottle. ) And 72 g sodium carbonate, and mixed with 1.2L of mixed solvents (toluene, ethanol, and water) of toluene, ethanol, and water were sufficiently dissolved. 0.5 g of dichloro-di-tert-butyl-(4-dimethylaminophenyl) phosphine (II) was added, refluxed for 6 h. After completion of the reaction, the reaction solution was cooled, and 500 ml of water was added, the water phase was added, and the organic phase was washed with a toluene, and the organic phase was washed with saturated brine, and the mixture was crystallized with isopropanol to obtain 182.8g. The compound of formula B-3 (4'-ethoxy-2 ', 3,3'-trifoxy-[1,1'-biphenyl) -2-alcohol) (purity: 99.35%) Rativity: 86%).

...

Example Embodiment

[0222] Example 2

[0223] The synthetic route of Compound I-3-5-1 is as follows:

[0224]

[0225] Step 1. Preparation of compounds of formula B-8

[0226] 120 g of the compound of formula B-7 ((2,3-difluoro-4'-propyl-[1,1, 1'-biphenyl] -4-yl) boric acid was added (2,1,1, 1'-biphenyl] -4-yl), 160.5 g of formula B. The compound (2-bromo-6-fluorophenylphenol) and 83 g of sodium carbonate, and a mixed solvent (toluene, ethanol, and water) of toluene, ethanol and water is 2: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1) Dissolve. 0.5 g of dichloro-di-tert-butyl-(4-dimethylaminophenyl) phosphine (II) was added, refluxed for 6 h. After the reaction, the reaction solution was cooled, and 500 ml of water was added, 2 times in the water phase was added, and the organic phase was washed 2 times, and the organic phase was washed with a saturated brine, and mixed, concentrated, mixed with toluene and ethanol. Solvent (toluene and ethanol is 1: 1) Re-crystallization t...

Example

[0246] Application ratio 1

[0247] The liquid crystal compositions of the Comparative Example 1 were formulated in accordance with the respective compounds listed in Table 6 and their weight percentage, and they were filled between the two substrates of the liquid crystal display.

[0248] Table 6. Formulation and performance parameter test results of Liquid crystal composition

[0249]

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Abstract

The invention provides a liquid crystal compound shown in a general formula I, a liquid crystal composition containing the liquid crystal compound and a liquid crystal display device containing the liquid crystal composition. Compared with the prior art, the liquid crystal compound shown in the general formula I provided by the invention has a relatively large clearing point, relatively large optical anisotropy and a relatively large dielectric anisotropy absolute value under the condition of maintaining proper rotary viscosity, the liquid crystal composition containing the liquid crystal compound has a large clearing point, large optical anisotropy, a large dielectric anisotropy absolute value, a large elastic constant and a small ratio of the rotary viscosity to the spreadwise elastic constant under the condition that proper low-temperature storage stability and proper rotary viscosity are maintained, and therefore, the liquid crystal display device containing the liquid crystal composition has a wide nematic phase temperature range, a good contrast ratio, a low threshold voltage and short response time.

Description

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Claims

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Application Information

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Owner JIANGSU HECHENG ADVANCED MATERIALS
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