Two vanadium-containing Keggin silicopolyoxotungsto compounds K₅SiVW₁₁O₄₀ and K₆SiV₂W₁₀O₄₀ were synthesized and characterized. They were incorporated in a superporous hydrogel constitute by prop-2-enamide and propenoic acid as initial monomers and bis-acrylamide as cross-linking moiety. Materials were characterized by several techniques. According to FTIR and ⁵¹V MAS-NMR, the (SiV_xW_12-xO₄₀)^(4+x)- anions are the main species present in the hybrid materials. Additionally, they do not decompose during the preparation of the composite. XRD and SEM-EDX results suggest that (SiV_xW_12-xO₄₀)^(4+x)- anions were well dispersed in the support or present as amorphous phases. These materials were evaluated as catalysts in the oxidation of sulfides to sulfones, using an eco-friendly oxidant and mild reaction conditions. The hybrid materials with higher content of the heteropoly compound displayed a remarkable catalytic behaviour in the oxidation of diphenyl sulfide. Materials also exhibited a stable catalytic performance through consecutive reuses. Optimum reaction parameters established were subsequently translated to the oxidation of a sulfide of interest (dapsone) due to its pharmacological activities.

合成并表征了两种含钒的Keggin硅聚氧杂锡化合物K ₅ SiVW ₁₁ O ₄₀和K ₆ SiV ₂ W ₁₀ O ₄₀。它们被掺入由丙-2-烯酰胺和丙酸作为初始单体和双丙烯酰胺作为交联部分构成的超多孔水凝胶中。材料通过几种技术来表征。根据FTIR和⁵¹ V MAS-NMR，（SiV _x W _12-x O ₄₀）^{（4 + x）-}阴离子是杂化材料中存在的主要物质。另外，它们在复合材料的制备过程中不会分解。XRD和SEM-EDX结果表明（SiV _x W _12-x O ₄₀）^{（4 + x）-}阴离子很好地分散在载体中或呈非晶相存在。使用生态友好型氧化剂和温和的反应条件，评估了这些材料作为硫化物氧化成砜的催化剂。杂多化合物含量较高的杂化材料在二苯硫的氧化中表现出显着的催化性能。通过连续重复使用，材料还表现出稳定的催化性能。所建立的最佳反应参数随后由于其药理活性而转化为目标硫化物（氨苯砜）的氧化。