Lignin-Derived Thioacidolysis Dimers: Reevaluation, New Products, Authentication, and Quantification
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- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, 381 Wushan Rd Tianhe District Guangzhou 510640 P. R. China, Department of Biochemistry and DOE Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin-Madison, 1552 University Ave. Madison WI 53726 USA
- Department of Biochemistry and DOE Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, University of Wisconsin-Madison, 1552 University Ave. Madison WI 53726 USA
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, 35 Qinghua East Rd Haidian District Beijing 100083 P. R. China
Lignin structural studies play an essential role both in understanding the development of plant cell walls and for valorizing lignocellulosics as renewable biomaterials. Dimeric products released by selectively cleaving β–aryl ether linkages between lignin units reflect the distribution of recalcitrant lignin units, but have been neither absolutely defined nor quantitatively determined. Here in this work, 12 guaiacyl-type thioacidolysis dimers were identified and quantified using newly synthesized standards. One product previously attributed to deriving from β–1-coupled units was established as resulting from β–5 units, correcting an analytical quandary. Another longstanding dilemma, that no β–β dimers were recognized in thioacidolysis products from gymnosperms, was resolved with the discovery of two such authenticated compounds. Finally, individual GC response factors for each standard compound allowed rigorous quantification of dimeric products released from softwood lignins, affording insight into the various interunit-linkage distributions in lignins and thereby guiding the valorization of lignocellulosics.
- Research Organization:
- Univ. of Wisconsin, Madison, WI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- FC02- 07ER64494; FC02-07ER64494
- OSTI ID:
- 1346254
- Alternate ID(s):
- OSTI ID: 1346255; OSTI ID: 1427629
- Journal Information:
- ChemSusChem, Journal Name: ChemSusChem Vol. 10 Journal Issue: 5; ISSN 1864-5631
- Publisher:
- ChemPubSoc EuropeCopyright Statement
- Country of Publication:
- Germany
- Language:
- English
Web of Science
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