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Journal Articles Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry Year : 2006

Synthesis and Characterization of New Rare‐Earth Sandwich‐Type Tungstoarsenates

Abstract

Two new sandwich‐type tungstoarsenate complexes [{Ln3O3(OH2)2}(AsW9O34)2]15− (Ln=La, Ce) were synthesized and studied using spectroscopy and cyclic voltammetry. Ion‐exchange experiments provided evidence for covalent, inner‐sphere bonding of the rare‐earth cations to the trilacunary [AsW9O34]9− polyoxometalate. Cyclic voltammograms of [{Ln3O3(OH2)2}(AsW9O34)2]15− exhibited two pairs of waves with negative potential values, which were attributed to the WVI/WV redox processes in the polyoxotungstate framework. Redox studies of the cerium derivative revealed the presence of two types of cerium ions.
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hal-04171478 , version 1 (26-07-2023)

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Adrian‐raul Tomşa, Aglaia Koutsodimou, Polycarpos Falaras, Marie‐claude Bernard, Vladimir Graban, et al.. Synthesis and Characterization of New Rare‐Earth Sandwich‐Type Tungstoarsenates. Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 2006, 36 (4), pp.335-344. ⟨10.1080/15533170600651447⟩. ⟨hal-04171478⟩
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