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Chromoselective Photocatalysis: Controlled Bond Activation through Light‐Color Regulation of Redox Potentials
Author(s) -
Ghosh Indrajit,
König Burkhard
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201602349
Subject(s) - photocatalysis , photochemistry , redox , catalysis , selectivity , chemistry , halide , ligand (biochemistry) , photoredox catalysis , molecule , visible spectrum , combinatorial chemistry , inorganic chemistry , materials science , organic chemistry , optoelectronics , receptor , biochemistry
Catalysts that can be regulated in terms of activity and selectivity by external stimuli may allow the efficient multistep synthesis of complex molecules and pharmaceuticals. Herein, we report the light‐color regulation of the redox potential of a photocatalyst to control the activation of chemical bonds. Light‐color control of the redox power of a photocatalyst introduces a new selectivity parameter to photoredox catalysis: Instead of changing the catalyst or ligand, alteration of the color of the visible‐light irradiation adjusts the selectivity in catalytic transformations. By using this principle, the selective activation of aryl–halide bonds for C−H arylation and the sequential conversion of functional groups with different reduction potentials is possible by simply applying different colors of light for excitation of the photocatalyst.