卤化
溴
化学
选择性
催化作用
光化学
聚苯乙烯磺酸盐
水溶液
钙钛矿(结构)
溴化物
无机化学
溴化氢
有机化学
佩多:嘘
聚合物
作者
Yanfei Zhang,Hong Wang,Yan Liu,Can Li
出处
期刊:Chinese Journal of Catalysis
[China Science Publishing & Media Ltd.]
日期:2022-07-01
卷期号:43 (7): 1805-1811
被引量:5
标识
DOI:10.1016/s1872-2067(22)64101-9
摘要
Aromatic bromides are important chemicals in nature and chemical industries. However, their traditional synthesis routes suffer from low atomic economy and pollutant formation. Herein, we show that organic–inorganic hybrid perovskite methylammonium lead bromide (MAPbBr3) nanocrystals stabilized in aqueous HBr solution can achieve simultaneous aromatic bromination and hydrogen evolution using HBr as the bromine source under visible light irradiation. By hybridizing MAPbBr3 with Pt/Ta2O5 and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate as electron- and hole-transporting motifs, aromatic bromides were achieved from aromatic compounds with high yield (up to 99%) and selectivity (up to 99%) with the addition of N,N-dimethylformamide or its analogs. The mechanistic studies revealed that the bromination proceeds via an electrophilic attack pathway and that HOBr may be the key intermediate in the bromination reaction.
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