Cycloaddition of Carbon Dioxide to Allyl Glycidyl Ether Using Silica-supported Ionic Liquid as a Catalyst

In this study, imidazolium salt ionic liquid on amorphous silica was prepared and its catalytic performance in the cycloaddition of CO2 with allyl glycidyl ether (AGE) to produce heterocyclic carbonate was investigated. The ionic liquid was generated on chloropropyl functionalized silica through the immobilization of imidazole. The prepared catalyst was characterized using a number of instrumental analysis including XRD, BET, 29 Si MAS-NMR and SEM. 29 Si MAS-NMR showed that the ionic liquid formed adduct with the chloropropyl groups attached to the silica surface. The immobilized ionic liquid showed very good catalytic activity for the cycloaddition of CO2 with AGE, showing 55-67% of AGE conversion with over 85% of the carbonate selectivity at 80-120