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Rhodium-terpyridine catalyzed redox-neutral depolymerization of lignin in water

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Abstract

Simple rhodium terpyridine complexes were found to be suitable catalysts for the redox neutral cleavage of lignin in water. Apart from cleaving lignin model compounds into ketones and phenols, the catalytic system could also be applied to depolymerize dioxasolv lignin and lignocellulose, affording aromatic ketones as the major monomer products. The (hemi)cellulose components in the lignocellulose sample remain almost intact during lignin depolymerization, providing an example of a “lignin-first” process under mild conditions. Mechanistic studies suggest that the reaction proceeds via a rhodium catalyzed hydrogen autotransfer process.

Graphical abstract: Rhodium-terpyridine catalyzed redox-neutral depolymerization of lignin in water

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Publication details

The article was received on 30 Aug 2019, accepted on 20 Nov 2019 and first published on 20 Nov 2019


Article type: Communication
DOI: 10.1039/C9GC03057C
Green Chem., 2020, Advance Article

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    Rhodium-terpyridine catalyzed redox-neutral depolymerization of lignin in water

    Y. Liu, C. Li, W. Miao, W. Tang, D. Xue, J. Xiao, T. Zhang and C. Wang, Green Chem., 2020, Advance Article , DOI: 10.1039/C9GC03057C

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