Pure and Applied Chemistry

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.