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Published on: June 10, 2021
Light-driven controllable cis-trans isomerization in a cycloparaphenylene dimer bridged by 9,9'-bifluorenylidene
Dongmei Zhang1, Kai Lan1, Xiaobo Zhang1
1College of Chemistry, Key Laboratory of Green Chemistry and Technology of Ministry of Education, Sichuan University, Chengdu, Sichuan 610064, China. cycheng@scu.edu.cn.
Abstract:
This work reports the synthesis and distinct photoisomerization of configurationally stable isomers of a cycloparaphenylene (CPP) dimer, bridged by a 9,9'-bifluorenylidene linker. Bidirectional photo-switching is achieved: a synergistic photoacid-catalyzed process drives trans-to-cis conversion, while a light-induced electron-transfer pathway enables efficient cis-to-trans isomerization.
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