Issue 13, 2023

Lignin C–C bond cleavage induced by consecutive two-photon excitation of a metal-free photocatalyst

Abstract

Photocatalytic lignin valorization has caught widespread attention; yet the reaction systems often employ noble metal complexes, hydrogen atom transfer (HAT) agents, and/or sacrificial electron donors/acceptors that do not comply with atom economy or environmental friendliness. Herein, we discovered that N-phenylphenothiazine (PTH) as a metal-free photocatalyst induced the cleavage of the lignin Cα–Cβ bond under ambient conditions free of those additional agents with a high yield and selectivity toward benzoic acid. Transient spectroscopic investigations revealed that the energy-demanding Cα–Cβ bond cleavage was induced by the potent oxidant, 2PTH˙+*, that was derived from consecutive two-photon excitation of PTH.

Graphical abstract: Lignin C–C bond cleavage induced by consecutive two-photon excitation of a metal-free photocatalyst

Supplementary files

Article information

Article type
Communication
Submitted
09 dic. 2022
Accepted
17 ene. 2023
First published
17 ene. 2023

Chem. Commun., 2023,59, 1777-1780

Lignin C–C bond cleavage induced by consecutive two-photon excitation of a metal-free photocatalyst

P. Li, R. Liu, Z. Zhao, F. Niu and K. Hu, Chem. Commun., 2023, 59, 1777 DOI: 10.1039/D2CC06730G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements