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Well-Dawson Polyoxometalates Synthesis and Spectroscopic Characterization

Medkour Amina, Bechiri Ouahiba

Wells-Dawson Heteropolyanions type and their transition metal sibstitued derivatives are a large group of transformable anionic clusters that have multiple applications, many of which are related to their redox properties. This work is part of HPA insoluble catalyst improvement approach including those of oxidation of organic compound. The authors have previously found that acidic cesium salt solid heteropoly compounds, where insoluble salt in water and important in practical uses because of its high catalytic activity and high thermal stability. Acidic cesium salt of Wells-Dawson heteropolyanions (HCs5P2W18O62, 16 H2O) was obtained as a precipitate by titration of an aqueous solution of H6P2W18O62 with an aqueous solution of CsCl and It was characterized by Fourier-Transform Infrared Spectroscopy(FT-IR), 31P NMR, EDS and cyclic voltammetry.