Electrochemical characterization of a series of substituted Dawson type tungstophosphates α[P2W18−xMozVyO62]n− (x = y + z; n = 6 + y)

Autor:	J.B. Tommasino, R. Contant, J. Roncin, J.P. Michaut
Rok vydání:	1998
Předmět:	Chemistry Analytical chemistry Electrochemistry Redox Characterization (materials science) Ion Inorganic Chemistry Esr spectra Paramagnetism Crystallography Unpaired electron Materials Chemistry Physical and Theoretical Chemistry Cyclic voltammetry
Zdroj:	Polyhedron. 17:357-366
ISSN:	0277-5387
DOI:	10.1016/s0277-5387(97)00274-x
Popis:	The electrochemical study of heteropolyanions α[P2W18−xMozVyO62]n− (x = y+z; n = 6 + y) have been performed in various acidic media. The analysis of the voltammograms of monosubstituted compounds is described and the reduction sites are identified. These observations are extended to the polysubstituted compounds. The electrochemical results are correlated with an ESR study performed at room temperature: the ESR spectra indicate that the unpaired electron is localised around Mo or V atoms in the monosubstituted compounds. In the other compounds, ESR spectra show that electron delocalization occurs when the paramagnetic MoV ion is surrounded by other MoVI ions. The number of atoms of Mo or V substituted and their position are discussed versus their redox properties.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::013d7b0f3532807a78f9bfa0e83d242a https://doi.org/10.1016/s0277-5387(97)00274-x Zobrazit plný text záznamu Full Text from ScienceDirect