Detection of muconic acid type structures in oxidised lignins using 2D NMR spectroscopy 10(th) EWLP, Stockholm, Sweden, August 25-28, 2008
authors Evtuguin, DV; Rocha, G; Goodfellow, BJ
nationality International
journal HOLZFORSCHUNG
author keywords lignin; muconic acid structures; NMR spectroscopy; oxidation; structural analysis
keywords DELIGNIFICATION
abstract The identification of muconic acid type structures (MATS) in oxidised lignins employing 2D NMR spectroscopy was carried out. The primary database for MATS detection by single bond H-1-C-13 (HSQC) and long-range H-1-H-1 and H-1-C-13 correlation (COSY and HMBC) NMR experiments was obtained with a series of model compounds: cis, cisand trans, trans-muconic acids and their methylated analogues and MATS derived from monomeric lignin model compounds oxidised by ClO2. Additional information was obtained from the study of oxygen-organosolv lignin obtained from spent liquor after the spruce wood delignification with oxygen in an acetone-water solution. This work allowed the reliable assignment of MATS signals in the HSQC spectra of oxidised lignin and provides a methodology for detection and distinguishing of MATS from structurally similar moieties.
publisher WALTER DE GRUYTER & CO
issn 0018-3830
year published 2009
volume 63
issue 6
beginning page 675
ending page 680
digital object identifier (doi) 10.1515/HF.2009.083
web of science category Forestry; Materials Science, Paper & Wood
subject category Forestry; Materials Science
unique article identifier WOS:000271661600005
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journal impact factor 1.826
5 year journal impact factor 1.828
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