A triphenylamine phenyl conjugated dithiophene ethylene derivative, its preparation and application

The dithienylethylene derivative modified by triphenylamine phenyl conjugation solves the problem that the existing dithienylethylene molecule switch requires ultraviolet light response, realizes a highly efficient photoisomerization reaction regulated by all visible light, improves conversion rate and molar absorptivity, and is suitable for information storage and anti-counterfeiting.

CN117050049BActive Publication Date: 2026-03-06HUAZHONG UNIV OF SCI & TECH
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Patent Information

Application Number
CN202310956369.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-28
Publication Date
2026-03-06
Estimated Expiration
2043-07-28

AI Technical Summary

Technical Problem

Existing dithienylethylene (DTE) molecular switches require ultraviolet light response, have low ring-opening and ring-closing conversion rates, and low molar absorptivity, making it difficult to effectively drive photochromic reactions under visible light.

Method used

We designed a triphenylamine phenyl conjugated dithiophene ethylene derivative and, by introducing a triphenylamine phenyl conjugated structure, red-shifted its absorption wavelength to the visible light region, thus achieving a photoisomerization reaction regulated by the entire visible light spectrum.

Benefits of technology

It achieves a highly efficient visible light-driven photochromic reaction with a closed-loop reaction conversion rate of up to 99.8%, a significantly improved molar absorptivity, excellent photoresponse and on/off ratio, resistance to photobleaching and stability, and is suitable for information storage and anti-counterfeiting applications.

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Abstract

This invention belongs to the field of new materials technology, and more specifically, relates to a triphenylamine phenyl conjugated modified dithienylethylene derivative, its preparation and application. The dithienylethylene derivative has structural units as shown in formula (I): wherein R1 and R2 are each independently -H, C1-C4 alkyl, or C6-C... 24 The invention designs a triphenylamine phenyl-modified dithienylethylene molecular switch, which red-shifts the absorption wavelength to the visible light region, allowing the ring-closing reaction to be regulated by visible light. At the same time, the ring-opening reaction itself regulates the wavelength in the visible light region, realizing the full visible light regulation of the dithienylethylene molecular switch photoisomerization reaction, and possessing both high visible light responsiveness and on / off ratio.
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