期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 140, 期 5, 页码 1966-1975出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b13364
关键词
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资金
- National Science Foundation of China [21788102]
- National Basic Research Program of China (973 Program) [2013CB834701, 2013CB834702]
- Research Grants Council of Hong Kong [16308016, 16305015, C2014-15G, A-HKUST605/16, N_HKUST604/14]
- Innovation and Technology Commission [ITC-CNERC14SC01]
- Science and Technology plan of Shenzhen [JCYJ20160229205601482]
Seeking new methods to obtain elaborate 'artificial on-demand photoswitching with multiple functionalities remains challenging. Most of the systems reported so far possess only one specific function and their nonemissive nature in the aggregated state inevitably limit their applications. Herein, a tailored cyanostilbene-based molecule with aggregation-induced emission characteristic was synthesized and was found to exhibit efficient, multiple and controllable photoresponsive behaviors under different conditions. Specifically, three different reactions were involved: (i) reversible Z/E isomerization under room light and thermal treatment in CH3CN, (ii) UV-induced photocyclization with a concomitant dramatic fluorescence enhancement, and (iii) regio- and stereo selective photodimerization in aqueous medium with microcrystal formation. Experimental and theoretical analyses gave visible insights and detailed mechanisms of the photoreaction processes. Fluorescent 2D photopattern with enhanced signal-to-background ratio was fabricated based on the controllable turn-on and turn-off' photobehaviors in different states. The present study thus paves an easy yet efficient way to construct smart multiphotochromes for unique applications.
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