SBA-15 supported acidic ionic liquid (IL-HSO4@SBA-15) for clean oxidation of aromatic and aliphatic sulfide in water

During the last decade, ionic liquids (ILs) are being more and more regarded as green catalysts and solvents due to their low volatility, negligible vapor pressure, reasonable thermal stability, outstanding recyclability and reusability 1. In the recent years, the immobilization of ILs into mesoporous SBA-15 (IL@SBA-15) has attracted more attention in replacement of the conventional minerals amorphous silica based on their high surface area, high thermal and mechanical stability 2. An important use of ionic liquids is the use of acid catalyst 3. In this communication,ionic liquid functionalized SBA-15 were prepared and applied as an efficient and recyclable metal and halogen free catalyst for selective oxidation of broad range of aromatic and aliphatic sulfides with aqueous hydrogen peroxide. This ronsted acidic ionic liquid catalyst has been reused more than 10 runs. Figure 1 illustrates the proposed mechanism of the reaction.

کلیدواژه ها:

SBA-15 ، Ionic liquid ، Clean oxidation ، Sulfide.