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Main-chain liquid crystal elastomer comprising azobenzene group, and synthesis method thereof

A technology of liquid crystal elastomer and azophenyl group, which is applied in the field of main chain type liquid crystal elastomer containing azophenyl group and its synthesis, which can solve the problems of many side reactions, expensive catalysts, harsh reaction conditions, etc.

Inactive Publication Date: 2014-01-15
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, most of the traditional methods for preparing main-chain liquid crystal elastomers use hydrosilylation reaction, which has problems such as complicated reaction operation, harsh reaction conditions, expensive catalysts, and many side reactions.

Method used

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  • Main-chain liquid crystal elastomer comprising azobenzene group, and synthesis method thereof
  • Main-chain liquid crystal elastomer comprising azobenzene group, and synthesis method thereof
  • Main-chain liquid crystal elastomer comprising azobenzene group, and synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment

[0014] Synthesis of 6-chlorohexyl p-toluenesulfonate

[0015] Add 6.00 grams of sodium hydroxide and 10.00 grams of 6-chlorohexanol to 50 mL of water, then dissolve 15.00 grams of p-toluenesulfonyl chloride in 50 mL of tetrahydrofuran, and add the above tetrahydrofuran solution dropwise to the aqueous solution under ice-bath conditions and Stir for 2 hours, stop the reaction, extract the mixed solution with dichloromethane, dry the organic phase with anhydrous magnesium sulfate, and concentrate to obtain 17.90 g of the product with a yield of 84.2%.

[0016] Synthesis of 1-chloro-6-(prop-2-ynyloxy)hexane

[0017] Under the protection of an ice-water bath and argon, 2.40 g of sodium hydride was carefully added to a solution of 3.80 g of propynyl alcohol in 30 mL of N,N-dimethylformamide. After stirring in an ice-water bath for 2 hours, a solution of 30.00 g of 6-chlorohexyl p-toluenesulfonate in 20 mL of N,N-dimethylformamide was added dropwise thereto. React at room temperat...

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Abstract

The invention relates to a novel main-chain liquid crystal elastomer comprising an azobenzene group, and a synthesis method thereof. First, an azobenzene compound with azide groups on two ends, an azobenzene compound with alkynyl groups on two sides, and a cross-linking agent comprising three alkynyls are synthesized; under the effect of a catalyst, a click chemistry reaction is carried out, such that a target substance is obtained. The target substrate is the main-chain liquid crystal elastomer comprising the azobenzene group.

Description

Technical field: [0001] The invention relates to a novel main chain type liquid crystal elastomer containing an azophenyl group and a synthesis method thereof. Background technique: [0002] The main chain type liquid crystal elastomer has both the excellent liquid crystal properties of the thermotropic liquid crystal and the special mechanical properties of the elastomer, and the azobenzene material has photoisomerization characteristics, and is used in liquid crystal polymers, optical materials, and shape memory materials. , information storage materials, biomedical materials, etc. have broad application prospects. In addition, most of the traditional methods for preparing main-chain liquid crystal elastomers use hydrosilylation reaction, which has problems such as complicated reaction operation, harsh reaction conditions, expensive catalysts, and many side reactions. The invention aims to propose a novel main chain type liquid crystal elastomer containing azophenyl group...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C07C245/08C09K19/38
Inventor 何尚锦康小林赵佳睿李海洋
Owner NANKAI UNIV