Visible light responsive spiropyran derivatives based on dynamic coordination bonds  

作　　者：Xiong Xiao Wei Zheng Yue Zhao Cheng-Hui Li 

机构地区：[1]State Key Laboratory of Coordination Chemistry,School of Chemistry and Chemical Engineering,Nanjing National Laboratory of Microstructures,Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210023,China

出　　处：《Chinese Chemical Letters》2023年第2期506-510,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 21631006 and 21771100)。

摘　　要：Spiropyrans(SPs) are a well-known class of photochromic compounds and have found widespread application due to their unique properties. However, for many conventional SPs, high energy ultraviolet(UV)light is commonly essential to drive photoisomerization, leading to poor fatigue resistance. Moreover, the practical application of spiropyrans is hindered by their fast fading speed due to the instability of closed forms(SP) or open forms(MC). Herein, we disclose a novel strategy to address these challenges through introducing both electron-donating substituents to stabilize the SP and dynamic coordination bonds to stabilize the MC. The resulting new spiropyrans complexes exhibit negative photochromic properties, with fast visible light response, good stability of both SP and MC, and significantly improved fatigue resistance.

关 键 词：Negativephotochromic SPIROPYRAN Visiblelightresponsive Dynamic coordination bonds Design guidelines 

分 类 号：O641.4[理学—物理化学]