Selective oxidation of alcohols with H2O2 catalyzed by long chain multi-SO3H functionalized heteropolyanion-based ionic liquids under solvent-free conditions

• Two multi-SO3H functionalized heteropolyanion-based ionic liquids were prepared.
• Ionic liquids exhibit high catalytic activities in selective oxidation of alcohols.
• Oxidation was carried out with H2O2 aqueous as oxidant under solvent-free conditions.
• Ionic liquids can be recovered and reused five times without loss in activities.

Two novel long chain multi-SO3H functionalized heteropolyanion-based ionic liquids were prepared and characterized. They as homogeneous catalysts showed high catalytic activity in selective oxidation of alcohols with 35% aqueous hydrogen peroxide under solvent-free conditions without adding any phase transfer catalyst. Two ionic liquids can be recovered readily and reused five times without any significant loss in their catalytic activities.

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