Abstract 689

UMR CNRS - Université Paris Diderot - Paris France



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Publication 689

Energy Environ. Sci. 4, 2041-2044, 2011 DOI:10.1039/C1EE01078F

Implications of remote water molecules on the electron transfer coupled processes at a nonporphyrinic Mn(III)-hydroxido complex

Sanae El Ghachtouli, Benedikt Lassalle-Kaiser, Pierre Dorlet, Régis Guillot, Elodie Anxolabéhère-Mallart, Cyrille Costentin and Ally Aukauloo

Institut de Chimie Moléculaire et des Matériaux d'Orsay, UMR-CNRS 8182, Université de Paris-Sud XI, F-91405, Orsay, France
Laboratoire d’Electrochimie Moléculaire, UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
CEA, iBiTec-S, Service de Bioénergétique Biologie Structurale et Mécanismes (SB2SM), F-91191, Gif-sur-Yvette, France

Electrochemical studies of a new Mn(III)(OH) complex clearly evidence that the presence of outer spheres water molecules is essential for the reversibility of Mn^III/II and Mn^IV/III redox processes. In the Mn^III/II case we found an isotope effect for D₂O and ¹⁸OH₂ allowing us to propose a mechanism for H₂O/HO^- ligand exchange coupled electron transfer activation of Mn–OH₂.

© 2005 LEM

Implications of remote water molecules on the electron transfer coupled processes at a nonporphyrinic Mn(III)-hydroxido complex