Sulfonation of phenolic end groups in lignin directs laccase-initiated reactions towards cross-linking

Dimitri Areskogh, Paula Nousiainen, Jiebing Li, Göran Gellerstedt, Jussi Sipilä, Gunnar Henriksson*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

The effect of sulfonation of the a-carbon on model compounds representing phenolic end groups on lignin was studied with respect to the reactions initiated by oxidation of laccase, by mass spectrometry. Sulfonation seems to direct the reactions towards formation of 5-5'and 4-O-5'bonds, avoiding formation of 1-O-4' bonds and oxidation of the a-carbon. This, in turn, will facilitate cross-linking reactions between lignin molecules. Sulfonation therefore has potential as an industrial pretreatment prior to laccase treatment for various wood-containing materials.

Original languageEnglish
Pages (from-to)50-59
Number of pages10
JournalIndustrial Biotechnology
Volume6
Issue number1
DOIs
Publication statusPublished - 1 Feb 2010
MoE publication typeA1 Journal article-refereed

Keywords

  • Cross-coupling
  • Laccase
  • Lignin
  • Lignosulfonate
  • Mass spectrometry
  • Sulfonation

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