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Liquid crystal compound as well as preparation method and application thereof

A technology of liquid crystal compounds and compounds, applied in chemical instruments and methods, liquid crystal materials, etc., can solve problems such as clearing point drop

Inactive Publication Date: 2018-01-09
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved in the present invention is to provide a liquid crystal compound and its preparation method and application, so as to improve the problem of lower clearing point in the existing liquid crystal compound with difluoromethyleneoxy, and improve the response speed of the liquid crystal mixture

Method used

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  • Liquid crystal compound as well as preparation method and application thereof
  • Liquid crystal compound as well as preparation method and application thereof
  • Liquid crystal compound as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0089] The invention also discloses a preparation method of the liquid crystal compound,

[0090] The synthetic route of the compound shown in the formula I-1 is,

[0091]

[0092] The synthetic route of the compound shown in the formula I-2 is,

[0093]

[0094] The synthetic route of the compound shown in the formula I-3 is,

[0095]

[0096] The present invention further discloses a liquid crystal composition composed of liquid crystal compounds. The liquid crystal composition includes component A composed of a compound represented by general formula I, and a component composed of one or two compounds represented by general formula II B, component C consisting of three to ten compounds represented by general formula III, the mass ratio of component A, component B, and component C is 1-40:5-40:5-80,

[0097]

[0098] in,

[0099] R 1 , R 2Any one selected from straight-chain alkyl groups with 1 to 6 carbon atoms and straight-chain alkenyl groups with 2 to 6 ...

Embodiment 1

[0117] Preparation of liquid crystal compounds shown in formula Ⅰ-1-1-1, the structural formula is as follows,

[0118]

[0119] The synthetic route is,

[0120]

[0121] It specifically includes the following five steps from step 1-a to step 1-e,

[0122] 1-a) 47.2g (0.2mol) Dissolve in 280ml tetrahydrofuran, cool down to -70°C under nitrogen protection, the reaction solution becomes relatively viscous, add 84ml (0.21mol, 2.5M) of n-butyllithium dropwise for lithium-bromine exchange, stir for 15 minutes after addition, and then keep temperature drop 16.8g (0.2mol) was added, gradually became thinner, and became transparent when the addition was completed. The temperature was raised to 0°C, poured into 300ml of water, the organic layer was separated, extracted, washed with water, and the solvent was evaporated. Add 200ml of toluene and 1.8g of p-toluenesulfonic acid, heat up to 110°C and reflux to separate water. Pour into 200ml of water, separate the organic layer...

Embodiment 2

[0128] Preparation of liquid crystal compounds shown in formula Ⅰ-1-10-1, the structural formula is as follows,

[0129]

[0130] According to the same steps as in Example 1, in Example 1 step 1-a) replace with A liquid crystal compound represented by formula I-1-10-1 is prepared.

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Abstract

The invention discloses a liquid crystal compound containing methyl benzene and difluorometheneoxy linking groups as well as a preparation method and an application of the liquid crystal compound. Thestructure of the compound is shown as the formula I in the description. The liquid crystal compound having the molecular structure shown as the formula I and containing the methyl benzene and difluorometheneoxy linking groups (-CF2O-) not only has higher dielectric anisotropy, but also has quite high response speed, and the properties including higher dielectric anisotropy and high response speedhave great significance for blending a liquid crystal mixture.

Description

[0001] This application is a divisional application of the Chinese application submitted on September 2, 2015 with the application number 201510556069.4 titled "A liquid crystal compound and its preparation method and application". technical field [0002] The invention relates to the field of preparation and application of liquid crystal compounds, in particular to a liquid crystal compound with methylbenzene and difluoromethyleneoxy groups, a preparation method and application thereof. Background technique [0003] At present, the application range of liquid crystal compounds is expanding more and more widely, and it can be used in displays, electro-optic devices, sensors, etc. There are various types of liquid crystal compounds used in the above-mentioned display fields, among which nematic liquid crystals are most widely used. Nematic liquid crystals have been used in passive TN, STN matrix displays and systems with TFT active matrix. [0004] For the application field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/30C09K19/44
CPCC09K19/0403C09K2019/0466
Inventor 邓佳员国良李明赵磊王瑾张虎波张芳苗
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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