Preparation method and application of biphenyl bridged bis-benzimidazolium

Abstract

The invention discloses a preparation method and application of biphenyl bridged bis-benzimidazolium. 1,3-dimethyl benzimidazolium iodate and 1,4-diiodobiphenyl as substrates, a metal salt as a catalyst and an alkali as an additive are subjected to reaction at 0-200 DEG C for 0.1-96 hours to obtain biphenyl bridged bis-benzimidazolium via one step. The compound biphenyl bridged bis-benzimidazoliumis dissolved in acetonitrile; a little quality of the obtained solution is injected between two ITO (indium tin oxide) glass sheets; a voltage is applied; the solution turns from no color to coffee;the voltage is removed, and the solution turns colorless; the color variation process is irreversible many times. The preparation method has the advantages that, for instance, the process is simple, operation is convenient, the cost is low, and the preparation method is environmentally friendly and good in repeatability; it is expected to achieve industrial large-scale production. The imidazoliumderivative with electrochromic property is synthesized herein and is expectedly applicable to the fields, such as electronic displays, variable color glass, and automotive anti-dazzling rearview mirrors.

Description

Technical field [0001] The invention belongs to the technical field of chemical synthesis and application, and particularly relates to a preparation method and application of biphenyl bridged bisbenzimidazolium. Background technique [0002] The material molecules with electrochromic properties reported so far mainly include inorganic metal oxides, viologen, conjugated conductive polymers, phthalocyanines, metal complexes, and Prussian blue. Electrochromic materials are widely used in electronic displays, automotive anti-glare glasses, smart windows, and color-changing glass. The cost of inorganic metal oxides is relatively high, and the structures of conjugated conductive polymers, phthalocyanines, metal complexes, Prussian blue, etc. are relatively complex and the preparation is relatively troublesome. Ziluojing has simple structure, easy modification and stable properties, and is favored by scientists. 2,2'-(-4,4'-biphenyl)-bis(1,3-dimethylbenzimidazolium) diiodide salt is s...

AI Technical Summary

Problems solved by technology

The cost of inorganic metal oxides is relatively high, and the structures of conjugated conductive polymers, phthalocyanines, metal complexes, and Prussian blue are relatively complex, and the preparation is more troublesome

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