Visible light responsive spiropyran derivatives based on dynamic coordination bonds

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

作者机构：State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China 

出 版 物：《中国化学快报：英文版》 (Chinese Chemical Letters)

年 卷 期：2023年第34卷第2期

页      面：506-510页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

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

主　　题：Negativephotochromic Spiropyran Visiblelightresponsive Dynamic coordination bonds Design guidelines 

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.