Premium
A Hybrid Catalyst for Light‐Driven Green Molecular Transformations
Author(s) -
Shimakoshi Hisashi,
Hisaeda Yoshio
Publication year - 2017
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201600303
Subject(s) - catalysis , isomerization , alkene , chemistry , rational design , combinatorial chemistry , hybrid material , cobalt , photochemistry , photocatalysis , materials science , nanotechnology , organic chemistry
This Minireview is focused on the development of hybrid catalysts composed of photosensitizers and a metal complex, especially vitamin B 12 derivatives. The semiconductor–metal complex composites are effective photocatalysts for molecular transformations due to the synergistic effect between the two components. The design of a B 12 complex for the hybridization with TiO 2 was simple and straightforward—cobyrinic acid, having seven carboxylic groups derived from naturally occurring B 12 is stably immobilized on the TiO 2 . By using the hybrid catalysts as mimics of B 12 ‐dependent enzymes, light‐driven reactions such as the dechlorination of organic halide pollutants, and radical‐mediated isomerization proceeded catalytically. In addition to the enzyme‐mimicking reactions, bioinspired reactions were also developed with the hybrid catalyst. The B 12 –TiO 2 hybrid catalyst was used for hydrogen evolution and alkene reduction by UV light irradiation, and the cobalt–hydrogen complex (Co–H complex) was considered to be a putative intermediate of the reactions. The multidisciplinary concept for the design of a hybrid catalyst is described in this Minireview.