Chapter 4. Metal Ion-Coupled and Proton-Coupled Electron Transfer in Catalytic Reduction of Dioxygen

Abstract

Metal ion-coupled and proton-coupled electron-transfer processes are described for one-electron, two-electron, and four-electron reduction of dioxygen by one-electron reductants, such as ferrocene derivatives, as well as by two-electron reductants, such as NADH analogs with metal complexes. The catalytic mechanism of the four-electron reduction of dioxygen as functional models of cytochrome c oxidases has been clarified based on detailed kinetic study and the detection of intermediates.