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Pure Appl. Chem., 2013, Vol. 85, No. 7, pp. 1415-1426

Published online 2013-04-10

Bioinspired catalytic reactions with vitamin B12 derivative and photosensitizers

Yoshio Hisaeda1,2*, Keishiro Tahara2,3, Hisashi Shimakoshi2 and Takahiro Masuko2

1 Center for Molecular Systems (CMS), Kyushu University, Fukuoka 819-0395, Japan
2 Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan
3 Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma 630-0192, Japan

Abstract: As part of a study directed toward design of good catalytic systems based upon a hydrophobic vitamin B12, heptamethyl cobyrinate perchlorate, we describe the preparation of various nanomaterials using the vitamin B12 derivative and photosensitizers. Examples include vitamin B12-hyperbranched polymers (HBPs), human serum albumin (HSA) containing vitamin B12 derivatives, a vitamin B12-titanium dioxide hybrid catalyst, a vitamin B12-Ru complex combined system, and a vitamin B12-rose bengal combined system. These bioinspired materials have the potential as catalytic systems for the degradation of organic halide pollutants and for molecular transformations via radical intermediates during irradiation by UV or visible light, and offer a variety of applications that are of great interest in terms of green chemistry.