Synthesis 2024; 56(13): 1967-1978
DOI: 10.1055/s-0042-1751518
review

Photoinduced Ligand-to-Metal Charge Transfer in Base-Metal Catalysis

Sean M. Treacy
,
The authors thank the National Institute of General Medical Sciences (NIGMS) (GM125206) for support.


Abstract

The absorption of light by photosensitizers has been shown to offer novel reactive pathways through electronic excited state intermediates, complementing ground-state mechanisms. Such strategies have been applied in both photocatalysis and photoredox catalysis, driven by generating reactive intermediates from their long-lived excited states. One developing area is photoinduced ligand-to-metal charge transfer (LMCT) catalysis, in which coordination of a ligand to a metal center and subsequent excitation with light results in the formation of a reactive radical and a reduced metal center. This mini review concerns the foundations and recent developments on ligand-to-metal charge transfer in transition-metal catalysis, focusing on the organic transformations made possible through this mechanism.

1 Introduction

2 Iron

3 Cobalt

4 Nickel

5 Copper

6 Future Outlook and Conclusion



Publication History

Received: 10 August 2023

Accepted after revision: 21 September 2023

Article published online:
21 November 2023

© 2023. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany