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Synthesis, Characterization, and Electrochemical Study of Tetradentate Ruthenium-Schiff Base Complexes: Dioxygen Activation with a Cytochrome P450 Model Using 1- or 2-Methylimidazole as Axial Bases

Abstract : Salicylaldehyde, 2-hydroxyacetophenone, and 3,5-dichlorosalicylaldehyde react with 1,2-diaminoethane to give three symmetrical Schiff bases H 2 L 1 , H 2 L 2 , and H 2 L 3 , respectively. With Ru(III) ions, these ligands lead to three complexes: Ru(III)ClL 1 ( 1 ), Ru(III)ClL 2 ( 2 ), and Ru(III)ClL 3 ( 3 ). The purity of these compounds was estimated by TLC technique and microanalysis while their structures were supported by the usual spectroscopic methods such as NMR, infrared, and electronic spectra. The cyclic voltammetry in acetonitrile showed irreversible waves for all three ligands. Under the same experimental conditions, it was proved that the ruthenium is coordinated in the three complexes 1 , 2 , and 3 showing quasireversible redox systems. The behavior of these complexes and their comparison with cytochrome P450 are investigated using them as catalysts in the presence of molecular oxygen with an apical nitrogen base: 1- or 2-methylimidazole.
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https://hal.univ-angers.fr/hal-03253590
Contributeur : Mustayeen Khan <>
Soumis le : mardi 8 juin 2021 - 13:07:31
Dernière modification le : mardi 8 juin 2021 - 15:34:49
Archivage à long terme le : : jeudi 9 septembre 2021 - 19:08:08

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Ali Ourari, Mostefa Khelafi, Djouhra Aggoun, Gilles Bouet, Mustayeen Khan. Synthesis, Characterization, and Electrochemical Study of Tetradentate Ruthenium-Schiff Base Complexes: Dioxygen Activation with a Cytochrome P450 Model Using 1- or 2-Methylimidazole as Axial Bases. Advances in Physical Chemistry, 2011, 2011, pp.1-11. ⟨10.1155/2011/157484⟩. ⟨hal-03253590⟩

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