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Liquid crystal composition containing substituted cyclohexyl compound and application thereof

A liquid crystal composition and compound technology, which is applied in the field of liquid crystal compositions containing substituted cyclohexyl compounds, negative liquid crystal compounds and their compositions, to achieve the effects of low rotational viscosity, shortened response time, and large elastic constant

Pending Publication Date: 2022-03-25
重庆汉朗精工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As people's requirements for the response time of liquid crystal displays are getting higher and higher, it is not enough to achieve fast response simply by changing the mode. Specifically, the response time of liquid crystal displays depends on the rotational viscosity and elastic constant of the liquid crystal composition.

Method used

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  • Liquid crystal composition containing substituted cyclohexyl compound and application thereof
  • Liquid crystal composition containing substituted cyclohexyl compound and application thereof
  • Liquid crystal composition containing substituted cyclohexyl compound and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0126] Embodiment 1: the synthesis of compound 3MCWO2

[0127] Its specific preparation process is as follows:

[0128]

[0129] (1) Synthesis of 3MC(V)WO2

[0130] Add 31.6g of 2,3-difluorophenetole and 300ml of tetrahydrofuran into the reaction flask, stir, and lower the temperature to -80°C under the protection of nitrogen. Slowly add 90 ml of 2.5M butyllithium / n-hexane solution dropwise, and keep the temperature between -70 and -75°C during the dropwise addition. After the addition of butyllithium was completed, the temperature was kept between -65°C and -75°C under the protection of nitrogen, and stirred for 6 hours. Dissolve 35.0g of 3MCK in 100ml of tetrahydrofuran and add it dropwise. During the dropwise addition, control the temperature between -75°C and -80°C. Control the temperature at -70°C to -75°C and stir for 3 hours. Add 45ml of concentrated hydrochloric acid and 150ml of water into a 1000ml beaker. Under stirring, the reaction solution was slowly poure...

Embodiment 2

[0135] Embodiment 2: the synthesis of compound 3MPWO2

[0136] Concrete synthetic steps are as follows:

[0137]

[0138] (1) Synthesis of 3M(V)P-Br

[0139] Add 2.6 g of magnesium chips, 300 ml of dry tetrahydrofuran (THF), and 1 grain of iodine into the reaction flask, stir, and raise the temperature to 40°C. Slowly add p-dibromobenzene 21g / THF40nl dropwise, after the reaction is initiated, slowly add dropwise, and control the temperature between 50-60°C. After the dropwise addition, the temperature was raised to reflux for 2h. Cool down to room temperature, water system, toluene extraction and separation. Add 1.2 g of p-toluenesulfonic acid to the obtained organic layer, raise the temperature and reflux for water separation for 4 h, cool to room temperature, add water 200 ml toluene 100 to extract and separate layers, and perform conventional post-treatment to obtain 36 g of 3M(V)P-Br oil. GC-MS: 292.1.

[0140] (2) 3M(V)PWO2

[0141] Add 50g 3M(V)P-Br, 48g 2,3-dif...

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Abstract

The invention relates to a liquid crystal composition containing a substituted cyclohexyl compound and application of the liquid crystal composition, and belongs to the field of liquid crystal materials. The liquid crystal composition is a negative dielectric liquid crystal composition and comprises at least one compound with a structure as shown in a general formula I, at least one compound as shown in a general formula II and at least one compound as shown in a general formula III. The liquid crystal composition is good in low-temperature intersolubility, large in elastic constant and moderate in electric anisotropy and refractive index anisotropy; the response time is shortened.

Description

technical field [0001] The invention relates to a negative liquid crystal compound and its composition and application, in particular to a liquid crystal composition containing a substituted cyclohexyl compound and its application, and belongs to the field of liquid crystal materials. Background technique [0002] Liquid crystal display elements using liquid crystal compositions are widely used in displays of watches, calculators, word processors, and the like. These liquid crystal display elements utilize the refractive index anisotropy, dielectric anisotropy, etc. of liquid crystal compounds. [0003] These liquid crystal display elements contain a liquid crystal composition having appropriate physical properties. The general physical properties necessary for the liquid crystal compound as a component of the liquid crystal composition are as follows: [0004] (1) chemical stability and physical stability; [0005] (2) High-definition bright spots (phase transition tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/137
CPCC09K19/44G02F1/137
Inventor 史志兵
Owner 重庆汉朗精工科技有限公司
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