Diamine monomer containing diphenylamine-fluorene, preparation method and application of same in polyimide preparation

Abstract

The invention discloses diamine monomer containing diphenylamine-fluorene, a preparation method and the application of same in polyimide preparation and belongs to the technical field of organic compound preparation. The monomer is N, N-dual (4-aminophenyl)-9, 9-dimethyl fluorene. A synthetic method comprise the following two steps that 1, under the action of cesium fluoride, 2 amino-9, 9-dimethyl fluorene and p-fluoronitrobenzene are subjected to nucleophilic substitution, and the N, N-dual (4-aminophenyl)-9, 9-dimethyl fluorene is obtained; then Pd / C serves as a catalyst and hydrazine hydrate serves as a reducing agent, and the N, N-dual (4-aminophenyl)-9, 9-dimethyl fluorene is obtained. According to the application, the N, N-dual (4-aminophenyl)-9, 9-dimethyl fluorene diamine monomer is involved into reaction with various dianhydride, and polyimide is obtained through the preparation. According to the diamine monomer containing the diphenylamine-fluorene, the preparation method and the application of same in polyimide preparation, by means of the structure peculiar to the diamine monomer, obtained polymer has good solubleness, and the unique photoelectric property is achieved; the diamine monomer and the polyimide obtained with the diamine monomer have vast application prospect in such fields as electroluminescence, cavity transmission and electrochromism.

Description

technical field

[0001] The invention belongs to the technical field of organic compounds, and in particular relates to a diamine monomer containing a diphenylamine-fluorene structure, a preparation method and its application in preparing polyimide. Background technique

[0002] Polyimide is widely used in high-tech fields such as aerospace, electronics and military because of its excellent performance. However, its application is greatly limited due to its refractory and insoluble properties. The introduction of bulky units such as hexafluoroisopropane and triphenylamine can effectively prevent the accumulation of molecular chains and increase the free volume, thereby improving the solubility of polyimide.

[0003] In recent years, the research group of Professor Liu Guisheng from Taiwan has carried out a series of studies on polyimides containing triphenylamine groups (YenHJ, LiouGS, Polymer Chemistry, 2012, 3(2):255-264.), the introduction of triphenylamine groups The gro...

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