光催化
卤化物
钙钛矿(结构)
环氧化物
催化作用
铋
烷氧基
选择性
路易斯酸
材料科学
光化学
无机化学
化学
有机化学
烷基
作者
Yitao Dai,Harun Tüysüz
出处
期刊:Chemsuschem
[Wiley]
日期:2019-05-30
卷期号:12 (12): 2587-2592
被引量:87
标识
DOI:10.1002/cssc.201900716
摘要
Abstract 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.
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