Diarylethenes (DAEs) have recently attracted great attention for their applications in light-responsive materials. As much efforts have been directed towards the elucidation of the structure-property relationship of DAE derivatives, improving photochromic performances through structure optimization is still worthy of study. Herein, three isomeric diarylethenes with thienopyridine units are designed for gaining insights into substituent position effect on photochromic performances. It is shown that the nitrogen atom in pyridine rings shows influence on the photochromic behaviors, such as photoreaction quantum yields, conversion ratios of target systems. Distinctively, thieno [3,2-b]pyridine-containing TP3 displays a novel solvent-dependent photochromic activity. And the photochromic reactivity of thieno [2,3-b]pyridine-containing TP1 can be specifically blocked by Cu²⁺, showing the gated photochromism. The diverse photochromic properties make the target systems promising candidates for the development of practical molecular devices with certain functions.

双芳烃（DAE）最近在光响应性材料中的应用引起了极大的关注。由于已经为阐明DAE衍生物的结构-性质关系做出了许多努力，通过结构优化改善光致变色性能仍然值得研究。本文中，设计了具有噻吩并吡啶单元的三个异构二芳基蒽，以深入了解取代基位置对光致变色性能的影响。结果表明，吡啶环中的氮原子对光致变色行为有影响，例如光反应量子产率，目标体系的转化率。独特的是，含有噻吩并[3,2 - b ]吡啶的TP3显示出新型的溶剂依赖性光致变色活性。含有噻吩并[2,3 - b ]吡啶的TP1的光致变色反应性可被Cu ²⁺特异性阻断，显示出门控光致变色现象。多种光致变色特性使目标系统有望成为具有某些功能的实用分子器件开发的候选系统。