Electrochemical and Electrocatalytic Properties of Vanadium-Containing Dawson-Type Polyoxometalates
Résumé
Mono-substituted vanadium-containing Dawson-type polyoxometalates having the general formula α1-[VIVW17X2O62]8− and α2-[VIVW17X2O62]8−, with X = As or P, were synthesised [1] and subject to a comprehensive electrochemical study comprising the pH dependency. Like their multi-vanadium counterparts, these POMs exhibit an electrocatalytic behaviour towards the oxidation of thiols (namely cysteine) [2], rendering them interesting species for mimicking oxidative stress situations, at physiological pH values. The efficiency of the electro-oxidation was assessed with several thiols, and the substrate that responded best was used to compare the electrocatalytic capabilities of the POM series.[3]
References
[1] B. Keita; I.-M. Mbomekallé; L. Nadjo; P. de Oliveira; A. Ranjbari; R. Contant, C. R. Chim., 2005, 8, 1057–1066.
[2] B. Keita; R. Contant; P. Mialane; F. Sécheresse; P. de Oliveira; L. Nadjo, Electrochem. Commun. 2006, 8, 767–772.
[3] J. Dika Manga; A.-L. Teillout; E. Rivière; P de Oliveira; I.M. Mbomekallé, Magnetochemistry 2021, 7, 157.