A new hybrid catalyst composed of a vitamin B12 derivative and a hyperbranched polymer (HBP) was synthesized and characterized by UV-vis and ESR spectroscopy as well as AFM. The B12-HBP showed good properties as a homogenous catalyst. The covalently-immobilized B12 moieties were efficiently solvated and the cobalt centers were accessible for pyridine guests. The B12-HBP showed high reactivity to 2-phenethylbromide and increased selectivity for reductive dimerization in the presence of TiO 2 with UV light irradiation.
All Science Journal Classification (ASJC) codes
- Inorganic Chemistry