光化学
激进的
化学
光诱导电子转移
甲基自由基
自由基取代
余辉
自由基离子
电子转移
有机化学
物理
伽马射线暴
天文
离子
作者
Yujie Yang,Jiaqiang Wang,Jie Yang,Lihuan Tong,Dan Li,Yuqi Yang,Manman Fang,Zhen Li
标识
DOI:10.1002/ange.202218994
摘要
Abstract No matter photoinduced organic radicals have been reported frequently, they are usually non‐luminescent at ambient conditions. The internal mechanism on stability and electronic transitions of photoinduced radicals, is thus crucial for the development of relevant materials. Herein, a series of photoinduced radical emission systems were developed conveniently through doping benzoic acids into the hydrogen donor polyvinyl alcohol (PVA) matrix. Visual photoinduced radical emission and photochromism could be observed on Ph‐3COOH @PVA film with the formation of cyclohexadienyl‐type structure. For the first time, radical afterglow appeared with energy transfer from triplet state. The appropriate introduction of carboxylic groups to three nonadjacent carbon atoms on the benzene ring was the best for decreasing spin population and promoting electronic transitions of the radical. This study largely expands the radical emission property from both internal mechanism and practical application.
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