Mechanism of formaldehyde adsorption of (+)-catechin |
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Authors: | Toshiyuki Takano Tomomi Murakami Hiroshi Kamitakahara Fumiaki Nakatsubo |
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Institution: | (1) Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan |
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Abstract: | The reaction of (+)-catechin with formaldehyde vapor was investigated as a model reaction of formaldehyde adsorption of (+)-catechin.
It was found by H nuclear magnetic resonance spectroscopy, matrix-assisted laser desorption/ionization time-of-flight mass
spectrometry, and gel permeation chromatography of the product that the vapor reaction of (+)-catechin with formaldehyde without
a solvent or a catalyst proceeds via methylolation, condensation, and polymerization. This is the same as the reaction in
a solvent in the presence of an acid or a base. The formation of polyoxymethylenes such as paraformaldehyde was not confirmed. |
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Keywords: | Adsorption (+)-Catechin Bark tannin Formaldehyde Vapor reaction |
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