Aromatic bromination with hydrogen production on organic-inorganic hybrid perovskite-based photocatalysts under visible light irradiation

Aromatic bromides are important chemicals in nature and chemical industries. However, their traditional synthesis routes suffer from low atomic economy pollutant formation. Herein, we show that organic–inorganic hybrid perovskite methylammonium lead bromide (MAPbBr3) nanocrystals stabilized aqueous HBr solution can achieve simultaneous aromatic bromination hydrogen evolution using as the bromine source under visible light irradiation. By hybridizing MAPbBr3 with Pt/Ta2O5 poly(3,4-ethylenedioxythiophene) polystyrene sulfonate electron- hole-transporting motifs, were achieved compounds high yield (up to 99%) selectivity addition of N,N-dimethylformamide or its analogs. The mechanistic studies revealed proceeds via an electrophilic attack pathway HOBr may be key intermediate reaction.