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Liquid crystal compound and liquid crystal composition comprising same

A technology of liquid crystal compounds and liquid crystal compositions, applied in the field of liquid crystal compounds and liquid crystal compositions, which can solve problems such as increased rotational viscosity

Inactive Publication Date: 2018-01-02
DONGJIN SEMICHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, negative liquid crystal materials with negative dielectric constant anisotropy have polar substituents on the side of the molecule. Therefore, compared with positive liquid crystal materials, negative liquid crystal materials have a slight change in dielectric constant Problems that can significantly increase rotational viscosity

Method used

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  • Liquid crystal compound and liquid crystal composition comprising same
  • Liquid crystal compound and liquid crystal composition comprising same
  • Liquid crystal compound and liquid crystal composition comprising same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0118] Preparation Example 1 (FNF-H.O2)

[0119]

[0120] Bromide compound (chemical formula 1-1, 40mmol, 18.8g) was dissolved in anhydrous THF, then stirred at -30°C and potassium tert-butoxide (48.1mmol, 5.4g) was slowly added, and stirred for 30 minutes. The aldehyde compound (Chemical Formula 1-2, 43.7 mmol, 8.13 g) was dissolved in THF at -30°C and added dropwise. After raising the temperature to -10° C. and stirring for 1 hour, a solvent with a ratio of water to toluene of 1:1 was added into the reactor to terminate the reaction. The organic solvent layer was extracted and distilled under reduced pressure, and the resulting solid was separated by column chromatography to obtain an ethene compound (chemical formula 1-3, 60%, 7.1 g). The obtained ethylene compound (chemical formula 1-3, 24mmol, 7.1g) and palladium / activated carbon (10wt%, 1.5g) were dissolved in THF and the ratio of methanol was 1:1 solvent, then reacted in hydrogenation reactor 3 Filter after hours. ...

preparation example 2

[0122] Preparation example 2 (FNAF-H.O2)

[0123]

[0124] Bromide compound (chemical formula 2-1, 40mmol, 18.8g) was dissolved in anhydrous THF, then stirred at -30°C, potassium tert-butoxide (48.1mmol, 5.4g) was slowly added, and stirred for 30 minutes. The aldehyde compound (Chemical Formula 2-2, 43.7 mmol, 11.45 g) was dissolved in THF at -30°C and added dropwise. After raising the temperature to -10° C. and stirring for 1 hour, a solvent with a ratio of water to toluene of 1:1 was added into the reactor to terminate the reaction. The organic solvent layer was extracted and distilled under reduced pressure, and the resulting solid was separated by column chromatography to obtain an ethylene compound (chemical formula 2-3, 57%, 8.5 g). The obtained ethylene compound (chemical formula 2-3, 22.83mmol, 8.5g) and palladium / activated carbon (10wt%, 2.1g) were dissolved in THF and methanol ratio in a solvent of 1:1, and then reacted in a hydrogenation reactor Filter after 3 ...

preparation example 3

[0126] Preparation example 3 (FANF-H.O2)

[0127]

[0128] Bromide compound (chemical formula 3-2, 27.3mmol, 14g) was dissolved in anhydrous THF, then stirred at -30°C, potassium tert-butoxide (32.7mmol, 3.7g) was slowly added, and stirred for 30 minutes. An aldehyde compound (Chemical Formula 3-1, 29.7 mmol, 6.49 g) was dissolved in THF at -30°C and added dropwise. After raising the temperature to -10° C. and stirring for 1 hour, a solvent with a ratio of water to toluene of 1:1 was added into the reactor to terminate the reaction. The organic solvent layer was extracted and distilled under reduced pressure, and the resulting solid was separated by column chromatography to obtain an ethylene compound (chemical formula 3-3, 65%, 6.6 g). The obtained ethylene compound (chemical formula 3-3, 17.7mmol, 6.6g) and palladium / activated carbon (10wt%, 1.65g) were dissolved in THF and methanol ratio as a solvent of 1:1, and then reacted in a hydrogenation reactor Filter after 3 ho...

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Abstract

The liquid crystal compound represented by a chemical formula 1 according to the present invention has high dielectric anisotropy, high refractive index anisotropy and low viscosity, and thus can provide a liquid crystal composition optimized for various liquid crystal display devices, particularly, liquid crystal display devices of VA, MVA, PVA, PS-VA, PALC, FFS, PS-FFS, IPS or PS-IPS modes whichrequire fast response times (wherein L1, L2, L3 and L4 are each independently hydrogen or halogen, R is hydrogen, C1-10 alkyl, C2-10 alkenyl or C1-10 alkoxy, and n1 and n2 are each independently an integer ranging from 0 to 2, and the sum of n1 and n2 is from 0 to 2).

Description

technical field [0001] The invention relates to a liquid crystal compound with high dielectric constant anisotropy, high refractive index anisotropy and low viscosity and a liquid crystal composition containing it. Background technique [0002] Liquid crystal display devices (LCDs) are used in various electrical equipment including clocks and electronic calculators, measuring equipment, vehicle panels, word processors, electronic notebooks, printers, computers, televisions, and the like. Typical liquid crystal display methods include twisted nematic (TN) type, super twisted nematic (STN) type, in-plane switching (IPS) type, fringe field switching (FFS) type, and vertical alignment (VA) type. [0003] Liquid crystal compounds used in such liquid crystal display devices require low-voltage driving, high-speed response, and a wide operating temperature range. In particular, liquid crystal materials are required to have various physical properties stable at about -20°C (low tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/14C09K19/42G02F1/13
CPCC09K19/14C09K19/30C09K19/42
Inventor 崔珍郁宋贞寅姜少熙
Owner DONGJIN SEMICHEM CO LTD