Note

Journal of Wood Science

, Volume 54, Issue 4, pp 329-331

First online:

Mechanism of formaldehyde adsorption of (+)-catechin

  • Toshiyuki TakanoAffiliated withDivision of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University Email author 
  • , Tomomi MurakamiAffiliated withDivision of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University
  • , Hiroshi KamitakaharaAffiliated withDivision of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University
  • , Fumiaki NakatsuboAffiliated withDivision of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University

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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.

Key words

Adsorption (+)-Catechin Bark tannin Formaldehyde Vapor reaction