Synthesis, characterization and catalytic function of a B 12-hyperbranched polymer

Keishiro Tahara, Hisashi Shimakoshi, Akihiro Tanaka, Yoshio Hisaeda

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14 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)3035-3042
Number of pages8
JournalDalton Transactions
Issue number12
Publication statusPublished - Mar 19 2010

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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