A green and reusable catalytic system based on silicopolyoxotungstovanadates incorporated in a polymeric material for the selective oxidation of sulfides to sulfones

Two vanadium-containing Keggin silicopolyoxotungsto compounds K5SiVW11O40 and K6SiV2W10O40 were synthesized characterized. They incorporated in a superporous hydrogel constitute by prop-2-enamide propenoic acid as initial monomers bis-acrylamide cross-linking moiety. Materials characterized several techniques. According to FTIR 51V MAS-NMR, the (SiVxW12-xO40)(4+x)- anions are main species present hybrid materials. Additionally, they do not decompose during preparation of composite. XRD SEM-EDX results suggest that well dispersed support or amorphous phases. These materials evaluated catalysts oxidation sulfides sulfones, using an eco-friendly oxidant mild reaction conditions. The with higher content heteropoly compound displayed remarkable catalytic behaviour diphenyl sulfide. also exhibited stable performance through consecutive reuses. Optimum parameters established subsequently translated sulfide interest (dapsone) due its pharmacological activities.