Electrochemical study with cavity microelectrode containing clay-supported Mn(III)salen complex - Dioxygen activation with cytochrome P450 model - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Journal of electroanalytical chemistry and interfacial electrochemistry Année : 2010

Electrochemical study with cavity microelectrode containing clay-supported Mn(III)salen complex - Dioxygen activation with cytochrome P450 model

Résumé

Mn(III)Cl-salen complex of tetradentate Schiff base ligand was incorporated into layers of clay montmorillonite by using an in situ flexible ligand method. The obtained modified clay was examined by X-ray diffraction, FT-IR and by using a cavity microelectrode (CME) to perform the electrochemical studies of the catalyst in the supported solid phase. Experiments show a well-defined and chemically reversible redox system of the manganese complex incorporated into the clay, similar to that observed in solution but with apparent diffusion coefficient around 2.3 x 10(-9) cm(-2) s(-1). Dioxygen activation in catalytic conditions that was found to be efficient in the modified material is studied with the CME. It demonstrates the absence of formation of mu-oxo dinners and peroxo-bridged compounds and a good penetration of the different reactants into the clay. Moreover, this analysis illustrates the interest of CME as a powerful tool for the study of similar supported catalyst implying the biomimetic activation of molecular oxygen.

Dates et versions

hal-00825625 , version 1 (24-05-2013)

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Youcef Zidane, Ali Ourari, Thierry Bataille, Philippe Hapiot, Didier Hauchard. Electrochemical study with cavity microelectrode containing clay-supported Mn(III)salen complex - Dioxygen activation with cytochrome P450 model. Journal of electroanalytical chemistry and interfacial electrochemistry, 2010, 641 (1-2), pp.64-70. ⟨10.1016/j.jelechem.2009.12.023⟩. ⟨hal-00825625⟩
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