摘要
The development of solid-state smart materials, in particular those showing photoresponsive luminescence, is highly desirable for their cutting edge applications in displays, sensors, data-storage, and anticounterfeiting. However, to achieve both excellent photoresponsive performance and bright luminescence in solid state remains challenge. Herein, we integrate a novel photochromic fluorophore YL into flexible polymer chains, thereby enabling the resultant polymer PYL with reversible photoisomerization upon aggregation. Remarkably, the polymer PYL possesses excellent photochromic properties and aggregationinduced emission(AIE) activity, which can be attributed to the photoactive YL moiety. Upon light exposure, its film exhibits reversibly off-to-on fluorescent modulation with quick response, high emission efficiency and signal contrast, sharply different from the weak emission in solution. The novel photoresponsive AIE polymer with invisible/visible color and fluorescence transformation allows for advanced anti-counterfeiting applications. This work provides an efficient platform for constructing solid-state photocontrollable luminescent materials.
基金
financially supported by the National Natural Science Foundation of China for Science Center Program (No. 21788102)
Creative Research Groups (No. 21421004)
Key Project (No. 21636002)
Shanghai Pujiang Program (No. 20PJ1402900)
National key Research and Development Program (No. 2016YFA0200300)
Shanghai Municipal Science and Technology Major Project (No. 2018SHZDZX03)
Program of Introducing Talents of Discipline to Universities (No. B16017)。
