固态荧光光开关分子研究进展

Research Progress of Solid-State Fluorescent Photoswitching Molecules

荧光光开关分子具有良好的快速响应性、可逆性和抗疲劳性,在防伪、超分辨成像、光学数据存储、传感器件等领域显示出巨大的应用潜能.荧光光开关分子的荧光切换需要一定的空间自由度,因此相比于溶液荧光光开关,实现固态的荧光光开关具有一定的难度.一个行之有效的方法是将聚集诱导发光(AIE)分子与荧光光开关分子通过共价键或超分子相互作用结合,AIE分子扭曲的构象可以为荧光光开关分子光照后的构型变化提供足够的空间,从而实现固态的荧光光开关.主要综述了这一策略在几种典型的光开关分子中的应用,为新型固态荧光光开关分子体系的设计提供有效的参考,对理解固态光开关分子刺激响应机制、开发新材料和拓展其应用具有重要意义.

Fluorescent photoswitching molecules have been explored for their potential applications in the fields of anticounterfeiting,super-resolution imaging,optical data storage,and sensor devices due to their fast response,reversibility,and fatigue resistance.The fluorescence switch of fluorescent photoswitching molecules requires a certain degree of spatial freedom,so compared to solution,achieving solid-state fluorescence switching is somewhat difficult.An effective method is to combine aggregation induced luminescence(AIE)molecules with fluorescent switching molecules through covalent bonds or supramolecular interactions,and the distorted conformation of AIE molecules can provide enough space for the configurational changes of fluorescent photoswitching molecules after light exposure,thus realizing solid-state fluorescent photoswitching.In this paper,the application of this strategy in several typical photoswitching molecules is mainly reviewed,providing a feasible reference for the design of novel solid-state fluorescent photoswitching molecular systems,which is crucial for understanding the stimulus-response mechanism of solid-state photoswitching molecules,developing new materials,and expanding their applications.