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Lead‐Free Cs 3 Bi 2 Br 9 Perovskite as Photocatalyst for Ring‐Opening Reactions of Epoxides
Author(s) -
Dai Yitao,
Tüysüz Harun
Publication year - 2019
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201900716
Subject(s) - photocatalysis , halide , perovskite (structure) , epoxide , catalysis , bismuth , alkoxy group , chemistry , selectivity , photochemistry , lewis acids and bases , materials science , inorganic chemistry , organic chemistry , alkyl
Herein, an innovative approach was developed by using stable, lead‐free halide perovskite for solar‐driven organic synthesis. The ring‐opening reaction of epoxides was chosen as a model system for the synthesis of value‐added β‐alkoxy alcohols, which require energy‐intensive process conditions and corrosive, strong acids for conventional synthesis. The developed concept included the in situ preparation of Cs 3 Bi 2 Br 9 and its simultaneous application as photocatalyst for epoxide alcoholysis under visible‐light irradiation in air at 293 K, with exceptional high activity and selectivity ≥86 % for β‐alkoxy alcohols and thia‐compounds. The Cs 3 Bi 2 Br 9 photocatalyst exhibited good stability and recyclability. In contrast, the lead‐based perovskite showed a conversion rate of only 1 %. The origin of the unexpected catalytic behavior was attributed to the combination of the photocatalytic process and the presence of suitable Lewis‐acidic centers on the surface of the bismuth halide perovskite photocatalyst.