Nucleophilic Thiols Reductively Cleave Ether Linkages in Lignin Model Polymers and Lignin
Abstract
Lignin may serve as a renewable feedstock for the production of chemicals and fuels if mild, scalable processes for its depolymerization can be devised. The use of small organic thiols represents a bioinspired strategy to cleave the β–O–4 bond, the most common linkage in lignin. In the present study, synthetic β–O–4 linked polymers were treated with organic thiols, yielding up to 90 % cleaved monomer products. Lignin extracted from poplar was also treated with organic thiols resulting in molecular weight reductions as high as 65 % (Mn) in oxidized lignin. Thiol–based cleavage of other lignin linkages was also explored in small–molecule model systems to uncover additional potential pathways by which thiols might depolymerize lignin. The success of thiol–mediated cleavage on model dimers, polymers, and biomass–derived lignin illustrates the potential utility of small redox–active molecules to penetrate complex polymer matrices for depolymerization and subsequent valorization of lignin into fuels and chemicals.
- Authors:
-
- Michigan State University, East Lansing, MI (United States)
- University of Wisconsin, Madison, WI (United States)
- Publication Date:
- Research Org.:
- Great Lakes Bioenergy Research Center, East Lansing, MI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1680057
- Grant/Contract Number:
- SC0018409; FC02-07ER64494
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ChemSusChem
- Additional Journal Information:
- Journal Volume: 13; Journal Issue: 17; Journal ID: ISSN 1864-5631
- Publisher:
- ChemPubSoc Europe
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Ether; homogeneous catalysis; lignin; polymers; sulfur
Citation Formats
Klinger, Grace E., Zhou, Yuting, Foote, Juliet A., Wester, Abby M., Cui, Yanbin, Alherech, Manar, Stahl, Shannon S., Jackson, James E., and Hegg, Eric L. Nucleophilic Thiols Reductively Cleave Ether Linkages in Lignin Model Polymers and Lignin. United States: N. p., 2020.
Web. doi:10.1002/cssc.202001238.
Klinger, Grace E., Zhou, Yuting, Foote, Juliet A., Wester, Abby M., Cui, Yanbin, Alherech, Manar, Stahl, Shannon S., Jackson, James E., & Hegg, Eric L. Nucleophilic Thiols Reductively Cleave Ether Linkages in Lignin Model Polymers and Lignin. United States. https://doi.org/10.1002/cssc.202001238
Klinger, Grace E., Zhou, Yuting, Foote, Juliet A., Wester, Abby M., Cui, Yanbin, Alherech, Manar, Stahl, Shannon S., Jackson, James E., and Hegg, Eric L. Wed .
"Nucleophilic Thiols Reductively Cleave Ether Linkages in Lignin Model Polymers and Lignin". United States. https://doi.org/10.1002/cssc.202001238. https://www.osti.gov/servlets/purl/1680057.
@article{osti_1680057,
title = {Nucleophilic Thiols Reductively Cleave Ether Linkages in Lignin Model Polymers and Lignin},
author = {Klinger, Grace E. and Zhou, Yuting and Foote, Juliet A. and Wester, Abby M. and Cui, Yanbin and Alherech, Manar and Stahl, Shannon S. and Jackson, James E. and Hegg, Eric L.},
abstractNote = {Lignin may serve as a renewable feedstock for the production of chemicals and fuels if mild, scalable processes for its depolymerization can be devised. The use of small organic thiols represents a bioinspired strategy to cleave the β–O–4 bond, the most common linkage in lignin. In the present study, synthetic β–O–4 linked polymers were treated with organic thiols, yielding up to 90 % cleaved monomer products. Lignin extracted from poplar was also treated with organic thiols resulting in molecular weight reductions as high as 65 % (Mn) in oxidized lignin. Thiol–based cleavage of other lignin linkages was also explored in small–molecule model systems to uncover additional potential pathways by which thiols might depolymerize lignin. The success of thiol–mediated cleavage on model dimers, polymers, and biomass–derived lignin illustrates the potential utility of small redox–active molecules to penetrate complex polymer matrices for depolymerization and subsequent valorization of lignin into fuels and chemicals.},
doi = {10.1002/cssc.202001238},
journal = {ChemSusChem},
number = 17,
volume = 13,
place = {United States},
year = {Wed Jul 15 00:00:00 EDT 2020},
month = {Wed Jul 15 00:00:00 EDT 2020}
}
Figures / Tables:
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Figures / Tables found in this record: