Research on Chemical Intermediates

, 21:397

New insights into the molecular architecture of hardwood lignins by chemical degradative methods

  • Catherine Lapierre
  • Brigitte Pollet
  • Christian Rolando
Article

DOI: 10.1007/BF03052266

Cite this article as:
Lapierre, C., Pollet, B. & Rolando, C. Res. Chem. Intermed. (1995) 21: 397. doi:10.1007/BF03052266

Abstract

Lignins are composed of phenylpropane units interconnected by labile and resistant bonds. A two-step degradation, thioacidolysis, provides detailed information on these network polymers. The first step involves lignin depolymerization with ethanethiol and BF3 etherate. The determination of the recovered thioethylated monomers provides an estimation of lignin units only involved in labile ether bonds. The ligninderived dimers, representative of resistant interunit bonds, are determined after a further desulfurization step. Results obtained for native and industrial hardwood lignins underline their structural differences. Native hardwood lignins are typified by a high proportion of linear fragments linked bifunctionally by β-O-4 bonds.

Copyright information

© Springer 1995

Authors and Affiliations

  • Catherine Lapierre
    • 1
  • Brigitte Pollet
    • 1
  • Christian Rolando
    • 2
  1. 1.Laboratoire de Biochimie INRAInstitut National Agronomique Paris-GrignonThiverval-GrignonFrance
  2. 2.Laboratoire de ChimieEcole Normale SupérieureParis, Cedex 05France