title: 1H and 13C NMR data of benzylsulfonic acids-model compounds for lignosulfonate.
abstract: 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 beta-beta, beta-5, 5-5 and beta-O-5 linkages in lignosulfonates, and will be important for further structural investigation on lignosulfonate.
authors.affiliation: Department of Chemistry, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway. bjart.frode.lutnaes@borregaard.com
authors.forename: Bjart F
authors.initials: BF
authors.lastname: Lutnaes
authors.forename: Bernt O
authors.initials: BO
authors.lastname: Myrvold
authors.forename: Rolf A
authors.initials: RA
authors.lastname: Lauten
authors.forename: Molla M
authors.initials: MM
authors.lastname: Endeshaw
mesh_terms: D002247:Carbon Isotopes; D008031:Lignin / Q000031:analogs & derivatives* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards*; D008698:Mesylates / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D011522:Protons
chemical_list: D002247:Carbon Isotopes; D008698:Mesylates; D011522:Protons; C035617:phenylmethanesulfonic acid; C001545:lignosulfuric acid; D008031:Lignin