title: Proton-coupled electron transfers in biomimetic water bound metal complexes. The electrochemical approach.
abstract: Water-bound metal (M) complexes play a central role in the catalytic centers of natural systems such as Photosystem II (PSII), superoxide dismutase, cytochrome c oxidase and others. In these systems, electron transfer reactions involving the metal center are coupled to proton transfers. Besides its fundamental interest, comprehension of these reactions and of possible bio-inspired catalytic devices is an additional motivation for studying the coupling between proton and electron transfer (proton-coupled electron transfers, PCET), starting with an aqua-M(II)/hydroxo-M(III) couple, and going to higher oxidation degrees as in the case of PSII (hydroxo-M(III)/oxo-M(IV) couple). Factors that determine the occurrence of the stepwise and concerted pathways are recalled from the illustrating example of a recently described mononuclear osmium complex, thus opening perspectives for further studies of the biomimicking complex. PCET in a mononuclear aqua/hydroxo manganese couple was then studied using the electrochemical approach.
authors.affiliation: Laboratoire d'Electrochimie Moléculaire, Unité Mixte de Recherche Université - CNRS No 7591, Université Paris Diderot, Bâtiment Lavoisier, 15 rue Jean de Baïf, 75205 Paris Cedex 13, France.
authors.forename: Elodie
authors.initials: E
authors.lastname: Anxolabéhère-Mallart
authors.forename: Cyrille
authors.initials: C
authors.lastname: Costentin
authors.forename: Clotilde
authors.initials: C
authors.lastname: Policar
authors.forename: Marc
authors.initials: M
authors.lastname: Robert
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Savéant
authors.forename: Anne-Lucie
authors.initials: AL
authors.lastname: Teillout
mesh_terms: D004563:Electrochemistry; D004579:Electron Transport; D006863:Hydrogen-Ion Concentration; D008345:Manganese / Q000737:chemistry; D008670:Metals / Q000737:chemistry*; D010084:Oxidation-Reduction; D011522:Protons; D014867:Water / Q000737:chemistry*
chemical_list: D008670:Metals; D011522:Protons; D014867:Water; D008345:Manganese