Origin of reduced lignin structures: Quinone methides
2005 (English)In: Appita Annu. Conf., 2005, 147-150 p.Conference paper (Refereed)
Recent discoveries have shown the presence of reduced lignin structures in softwood lignin, such as dihydroconiferyl alcohol and secoisolariciresinol. During lignin polymerization, the oxidative radical coupling of monolignols generates quinone methides as intermediates. Several reduction agents were tested on a quinone methide model. The products were analyzed by GC-MS and 1H, 13C, DEPT and HSQC NMR techniques were used to confirm the structure of the reduced quinone methide. An uncatalyzed reduction of this quinone methide model was achieved with β-NADH, a biologically significant reducing agent, demonstrating that the formation of reduced lignin structures is not necessarily biologically controlled.
Place, publisher, year, edition, pages
2005. 147-150 p.
, Appita Annual Conference, ISSN 1443-5454 ; 3
Alcohols, Nuclear magnetic resonance spectroscopy, Polymerization, Softwoods, Lignin structures, Oxidative radical coupling, Quinone methides, Lignin, Lignins, Nuclear Magnetic Resonance
Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-156481ScopusID: 2-s2.0-29344432392OAI: oai:DiVA.org:kth-156481DiVA: diva2:768302
59th Appita Annual Conference and Exhibition, incorporating the 13th ISWFPC: International Symposium on Wood, Fibre and Pulping Chemistry, 16-19 May 2005, Auckland, New Zealand
QC 201412032014-12-032014-11-282014-12-03Bibliographically approved