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Covalent Triazine Frameworks Catalytically Oxidative Cleavage of Lignin Models and Organosolv Lignin

Abstract

Covalent triazine frameworks (CTFs) were reported to be effective in the oxidative cleavage of lignin model compound 2-phenoxyacetophenone as metal-free catalysts with O2, producing phenol, benzoic acid, methyl benzoate and methyl benzoylformate as the major products. Combining the detailed characterizations with the reaction results, the triazine structure with unique properties of CTFs contributed to the superior catalytic performances. Mechanism investigation including isotope-labeling, radical trapping and intermediates verification experiments were researched. CTFs promoted the decomposition of the peroxide and the cleavage of C-C bond and C-O bond were both included. The catalyst was reusable and very stable under the present reaction conditions. When CTFs were applied in the catalytically oxidative cleavage of the organosolv lignin, nearly 80% of β-O-4 ketone bonds of the oxidized lignin were converted, suggesting the potential in the lignin depolymerization.

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Publication details

The article was received on 24 Jan 2018, accepted on 02 Feb 2018 and first published on 05 Feb 2018


Article type: Paper
DOI: 10.1039/C8GC00268A
Citation: Green Chem., 2018, Accepted Manuscript
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    Covalent Triazine Frameworks Catalytically Oxidative Cleavage of Lignin Models and Organosolv Lignin

    L. Zhao, S. Shi, M. Liu, G. Zhu, M. Wang, W. Du, J. Gao and J. Xu, Green Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8GC00268A

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