NMR studies on the occurrence of spirodienone structures in lignins
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
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.
lignins, spruce, birch, kenaf, spirodienone structure, beta-1-structure, NMR analysis, spruce lignin, dfrc method, spectroscopy, wood, identification
IdentifiersURN: urn:nbn:se:kth:diva-15633DOI: 10.1080/02773810600580271ISI: 000237021100006ScopusID: 2-s2.0-33646355474OAI: oai:DiVA.org:kth-15633DiVA: diva2:333675
QC 201005252010-08-052010-08-05Bibliographically approved