Ionic liquids promoted the CH oxidation of alcohols to carbonyl compounds using a new polysiloxane-supported (salen)chromium(III) catalyst

► An ion-exchangeable polysiloxane for immobilizing (salen)chromium(III) complex. ► Supported chromium catalyst effectively oxidized alcohols into carbonyl compounds. ► Imidazole ionic liquids were suitable solvents for catalyst recycling. ► Structural features of supported catalyst were briefly discussed.