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Liquid crystal compound, liquid crystal composition, preparation methods thereof and liquid crystal display panel

A liquid crystal compound and liquid crystal composition technology, which is applied in the preparation of carbon-based compounds, heterocyclic compounds, organic compounds, etc., can solve problems affecting the application range of liquid crystal displays, achieve good physical and chemical stability, and broaden applications range effect

Active Publication Date: 2014-09-03
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The clearing point of existing liquid crystal materials is generally around 100 degrees Celsius, which is relatively low, which seriously affects the application range of liquid crystal displays

Method used

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  • Liquid crystal compound, liquid crystal composition, preparation methods thereof and liquid crystal display panel
  • Liquid crystal compound, liquid crystal composition, preparation methods thereof and liquid crystal display panel
  • Liquid crystal compound, liquid crystal composition, preparation methods thereof and liquid crystal display panel

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preparation example Construction

[0055] The embodiment of the present invention also provides a preparation method of the above-mentioned liquid crystal compound P2, comprising the following steps:

[0056] Step a, compound P2-1 is subjected to bromination reaction with bromine in tetrahydrofuran, and compound P2-2 is obtained after separation; the reaction formula is as follows:

[0057]

[0058] Step b, compound P2-2 and propylmagnesium bromide in toluene, react to obtain compound P2-3; the reaction formula is as follows:

[0059]

[0060]Step c, compound P2-3 is subjected to bromination reaction with bromine in tetrahydrofuran, and compound P2-4 is obtained after separation; the reaction formula is as follows:

[0061]

[0062] After step d, compound P2-4 is made P2-4 Grignard reagent and Carry out addition reaction, then dehydration, reduction, generate compound P2-5; Reaction formula is as follows:

[0063]

[0064] Step e, compound P2-5 is hydrolyzed with formic acid in toluene to obtain ...

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Abstract

The invention relates to the technical field of liquid crystal display, and discloses a liquid crystal compound and a preparation method thereof, a liquid crystal composition and a preparation method thereof, and a liquid crystal display panel. The liquid crystal compounds has a structure as shown in P2, the compound has good physical and chemical stability and higher clearing point, the liquid crystal composition comprising the liquid crystal compound P2 also has high clearing point, and the application range of the liquid crystal display panel can be greatly expanded.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal compound and a preparation method thereof, a liquid crystal composition and a preparation method thereof, and a liquid crystal display panel. Background technique [0002] Among flat panel display devices, Thin Film Transistor Liquid Crystal Display (TFT-LCD for short) has the characteristics of small size, low power consumption, relatively low manufacturing cost and no radiation, and occupies a dominant position in the current flat panel display market. leading position. [0003] Liquid crystal displays have been widely used in various aspects of social life. Since the development of liquid crystal display technology, various liquid crystal compounds have been practically applied. Some general requirements for liquid crystal compounds, including phase transition temperature, optical anisotropy, dielectric anisotropy, viscosity, resistivity, etc.,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/32C07C13/66C07C1/32C09K19/44G02F1/1333
CPCC09K19/32C07C1/20C07C13/66C07C17/02C07C45/59C07C45/61C07D263/52
Inventor 田肖雄
Owner BOE TECH GRP CO LTD
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