Issue 24, 2023

Electronic coupling and electron transfer in hydrogen-bonded mixed-valence compounds

Abstract

Electron transfer provided by hydrogen bonds represents a unique and highly significant area of research, as it has a crucial role to play in a wide variety of chemical and biological systems. The hydrogen-bonded mixed-valence system, in the form of donor–hydrogen bond–acceptor, provides an ideal platform for exploring thermally-induced electron transfer across this non-covalent unit. Over the past decades, ongoing progress has been made in this field. Here we critically assess some studies on the qualitative and quantitative evaluation of electronic coupling and thermal electron transfer across hydrogen bond interface. Additionally, selected experimental examples are discussed in terms of intervalence charge transfer, with particular attention paid to the proton-coupled and often overlooked proton-uncoupled electron transfer pathway in hydrogen-bonded mixed-valence systems. We further highlight the major limitations of this research area and suggest potential directions for future exploration.

Graphical abstract: Electronic coupling and electron transfer in hydrogen-bonded mixed-valence compounds

Article information

Article type
Perspective
Submitted
24 3 2023
Accepted
27 4 2023
First published
03 5 2023

Phys. Chem. Chem. Phys., 2023,25, 16201-16211

Electronic coupling and electron transfer in hydrogen-bonded mixed-valence compounds

J. Li, Y. Shi and T. Cheng, Phys. Chem. Chem. Phys., 2023, 25, 16201 DOI: 10.1039/D3CP01337E

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