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1 H and 13 C NMR data of benzylsulfonic acids—model compounds for lignosulfonate
Author(s) -
Lutnaes Bjart F.,
Myrvold Bernt O.,
Lauten Rolf A.,
Endeshaw Molla M.
Publication year - 2008
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.2184
Subject(s) - lignosulfonates , chemistry , lignin , carbon 13 nmr , monomer , solubility , organic chemistry , proton nmr , polymer
Although there has been a major progress in the analysis of native lignin using NMR in the recent years, not much attention has been paid to lignosulfonates. Lignosulfonates are more difficult to analyse because of solubility issues and a more complex structure owing to chemical modification during the pulping process. A large database of NMR data is available for the building blocks of native lignin, but no data are available for the corresponding sulfonated compounds. We have prepared 15 monomeric and seven dimeric sulfonated model compounds characterised by NMR. These include models for end groups, as well as β‐β, β‐5, 5‐5 and β‐O‐5 linkages in lignosulfonates, and will be important for further structural investigation on lignosulfonate. Copyright © 2008 John Wiley & Sons, Ltd.