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NMR studies on the occurrence of spirodienone structures in lignins
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
2006 (English)In: Journal of wood chemistry and technology, ISSN 0277-3813, E-ISSN 1532-2319, Vol. 26, no 1, 65-79 p.Article in journal (Refereed) Published
Abstract [en]

Spirodienone structures have been detected in spruce, birch, and kenaf lignin isolates. NMR signals corresponding to guaiacyl and syringyl spirodienones were fully identified and assigned based on C-13, QUAT, HSQC, HSQC-TOCSY, and HMBC NMR data. Spruce lignin contains spirodienone structures of the guaiacyl type. Syringyl spirodienones dominate in kenaf and birch lignins. Each type of spirodienone was found to be present in two different stereoisomeric forms, with one of the isomers being more prevalent. Signal integrations indicate that about three spirodienones per 100 phenylpropanoid units are present in the spruce and birch lignins and about four in the kenaf lignin.

Place, publisher, year, edition, pages
2006. Vol. 26, no 1, 65-79 p.
Keyword [en]
lignins, spruce, birch, kenaf, spirodienone structure, beta-1-structure, NMR analysis, spruce lignin, dfrc method, spectroscopy, wood, identification
Identifiers
URN: urn:nbn:se:kth:diva-15633DOI: 10.1080/02773810600580271ISI: 000237021100006Scopus ID: 2-s2.0-33646355474OAI: oai:DiVA.org:kth-15633DiVA: diva2:333675
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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