[en] We have found that the tightly convoluted polypyridinium phosphotungstate catalyst 1 efficiently promoted the chemoselective oxidation of sulfides to sulfones with hydrogen peroxide. The catalyst was reused four times without loss of catalytic activity. Sulfones have generated considerable interest due to their presence in a number of biologically active compounds and also to their utility in organic synthesis. Sulfide oxidation is one of the standard approaches to sulfones, where a stoichiometric or larger amount of hazardous oxidants such as KMnO₄, MCPBA, and MMPP is often required. If sulfides could be efficiently oxidized with hydrogen peroxide by using a recyclable catalyst, the catalytic oxidation system would provide a viable, safe, clean, and environmentally benign alternative to the conventional stoichiometric oxidations