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Synthesis and characterization of vitamin B₁₂-hyperbranched polymer

Authors:	Keishiro Tahara Akihiro Tanaka Yoshio Hisaeda

Institution:	^a Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan ^b Synthesis Research Department, Chemical Research Laboratory, Nissan Chemical Industries, Ltd, Funahashi 274-8507, Japan

Abstract:	Vitamin B₁₂-hyperbranched polymer was synthesized and characterized by UV-vis and NMR spectroscopy as well as DLS. The shape of hybrid polymer was also directly observed by TEM. Microenvironmental polarity around vitamin B₁₂ derivative on the polymer was evaluated by UV-vis absorption peak with α-band of vitamin B₁₂ chromophore.

Keywords:	Vitamin B₁₂ Hyperbranched polymer Hybrid material Microenvironmental polarity
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