Reactive liquid crystal monomer compound, preparation method and application

A reactive liquid crystal and compound technology, applied in the field of liquid crystal, can solve the problems of complex structure, unfavorable industrialization and high cost, and achieve the effect of simple synthesis route and great application value

Inactive Publication Date: 2018-01-19
XIAN CAIJING OPTO ELECTRICAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high driving voltage of blue phase liquid crystals has become an urgent problem for researchers to solve, which is of great significance and value to the practical application of blue phase liquid crystals.
In the prior art, to solve the problem of excessively high driving voltage of blue phase liquid crystals, the driving voltage can be reduced by using high-torque compounds, but such compounds have complex structures, long synthetic routes, and high costs, which are not conducive to industrialization

Method used

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  • Reactive liquid crystal monomer compound, preparation method and application
  • Reactive liquid crystal monomer compound, preparation method and application
  • Reactive liquid crystal monomer compound, preparation method and application

Examples

Experimental program
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Embodiment 1

[0046] This embodiment provides a reactive liquid crystal monomer compound, the structural formula of which is shown in the abbreviation code M6BAF, that is, the compound 4-(6-(methacryloyloxy)hexyloxy)pentafluorophenylbenzoate .

[0047] The preparation method of the compound of the present embodiment specifically comprises the following steps:

[0048] Step 1: Synthesis of 4-(6-acetoxyhexyloxy)-benzoic acid methyl ester

[0049] Add 110g of N,N-dimethylformamide (DMF for short) into a 250mL three-necked flask, start stirring, and add 12.6g of 6-chlorohexanol acetate, 9g of methyl p-hydroxybenzoate, 0.5g of potassium iodide, carbonic acid Potassium 13.50g. Turn on heating to raise the temperature to 130°C, control the temperature at 127-133°C and react for 2 hours, take samples every half hour for gas chromatography detection, and stop the reaction when the raw material methyl p-hydroxybenzoate is less than 0.5%. When the temperature was lowered to 40°C, filter while it wa...

Embodiment 2

[0067] This embodiment provides a reactive liquid crystal monomer compound, the structural formula of which is shown in the abbreviation code M2BAF, that is, the compound 4-(2-(methacryloyloxy)ethoxy)pentafluorophenylbenzoate .

[0068] The preparation method of the compound of the present embodiment specifically comprises the following steps:

[0069] Step 1: Synthesis of 4-(2-acetoxyethoxy)-benzoic acid methyl ester

[0070] Add 110 g of DMF to a 250 mL three-necked flask, start stirring, and add 15 g of 2-chloroethanol acetate, 16.76 g of methyl p-hydroxybenzoate, 0.5 g of potassium iodide, and 16.50 g of potassium carbonate. Turn on heating and raise the temperature to 130°C, control the temperature at 127-133°C and react for 2 hours, take a sample every half hour for gas chromatography detection, and stop the reaction when the raw material methyl p-hydroxybenzoate is less than 0.5%. When the temperature was lowered to 40°C, filter while it was hot to remove inorganic sa...

Embodiment 3

[0081] This embodiment provides a reactive liquid crystal monomer compound, the structural formula of which is shown as the abbreviation code A3BAF, that is, the compound 4-(6-(acryloyloxy)propoxy)pentafluorophenylbenzoate.

[0082] The preparation method of the compound of the present embodiment specifically comprises the following steps:

[0083] Step 1: Synthesis of 4-(3-acetoxypropoxy)-benzoic acid methyl ester

[0084] Add 110 g of DMF to a 250 mL three-necked flask, start stirring, and add 15 g of 3-chloropropanol acetate, 15.88 g of methyl p-hydroxybenzoate, 0.5 g of potassium iodide, and 15.20 g of potassium carbonate. Turn on heating and raise the temperature to 130°C, control the temperature at 127-133°C and react for 2 hours, take a sample every half hour for gas chromatography detection, and stop the reaction when the raw material methyl p-hydroxybenzoate is less than 0.5%. When the temperature is lowered to 40°C, filter while it is hot to remove inorganic salts, ...

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Abstract

The invention discloses a reactive liquid crystal monomer compound, a preparation method and an application. The structure general formula of the compound is represented as follows, wherein R is hydrogen or methyl group and n is a natural number from 2 to 8. The reactive liquid crystal monomer compound is produced through a reaction to a raw material compound (E) and pentafluorophenol and then through post-treatment and purification processes. An application that the compound is used for reducing driving voltage of blue phase liquid crystal is also disclosed.

Description

technical field [0001] The invention belongs to the field of liquid crystals and relates to blue phase liquid crystals, in particular to a reactive liquid crystal monomer compound, which is suitable for forming a polymerization network when preparing mixed liquid crystals to widen the temperature range of the blue phase and reduce driving voltage. Background technique [0002] After the polymer stabilized blue phase technology successfully broadened the temperature range of the blue phase, the blue phase liquid crystal was hailed as the hope of the next generation of liquid crystal display. The blue-phase liquid crystal display technology based on the Kerr effect has a relatively wide temperature range, a sub-millisecond grayscale response rate, is easy to manufacture large screens, and does not require an alignment layer. s concern. There are two major problems in the blue phase liquid crystal: the temperature range is not wide enough and the driving voltage is too high. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/92C07C67/08C09K19/20C09K19/38C09K19/54G02F1/137
Inventor 别国军杨学军邓登刘俞彤刘昉张延魏杜渭松高嫒嫒赵群星赵凡张伟杰张旺财徐磊
Owner XIAN CAIJING OPTO ELECTRICAL SCI & TECH
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