Sustainable oxidation of olefins and sulfides employing nanopolyoxomolybdate supported by ionic liquid on dendritic fibrous nanosilica

Here, we reported a green and economical method for the oxidation of sulfides to sulfones and sulfoxides in water, and epoxidation of olefins in ethanol with O2 in the presence of keplerate nanosized polyoxomolybdate [Mo368] supported by ionic liquid between DFNS. In order to prepare the catalyst as a substrate to support [Mo368] NPs, an ionic liquid was employed to activate the DFNS exterior level. Ionic liquid removed the requirement for a reducing agent and performed as a natural reducing and stabilizing agent for [Mo368] NPs. The reaction efficiencies and selectivity were influenced by catalyst concentration. A different structural series of olefins and sulfides was set into intended oxidation products in spite of the electronic essence of the substituents. Despite the presence of heterogeneous reaction blends, no problems were noted with reaction progress. Products were easily removed from the green medium, and the catalyst was employed various times without remarkable reduction in performance and selectivity. The results of UV–vis, Raman spectral data, TGA, FT-IR, XRD, TEM, and FESEM showed the involvement of a Mo(VI) peroxo complex in oxidation reactions.