Department of Chemistry
3-(2-Hydroxyl-Ethyl)-1-propylimidazolium bromide immobilized on SBA-15 as efficient catalyst for the synthesis of cyclic carbonates via the coupling of carbon dioxide with epoxides
3-(2-hydroxyl-ethyl)-1-propylimidazolium bromide (HEPIMBr) was immobilized onto SBA-15, Al-SBA-15 mesoporous molecular sieves and SiO2 by chemical grafting method. The materials were characterized and used as catalysts for solvent-free synthesis of cyclic carbonates from CO2 and epoxides under relatively mild conditions. Among them, the HEPIMBr immobilized on SBA-15 performs the best, showing carbonate selectivity and yield of ca. 100% (120 °C, 2.0 MPa, 2 h). The catalyst is thermally stable and shows good reusability. Based on the experimental results, a plausible reaction mechanism has been proposed for the catalytic reaction. © 2010 Springer Science+Business Media, LLC.
Carbon dioxide, Cyclic carbonate, Epoxide, Hydroxyl ionic liquids, SBA-15
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Dai, Wei-Li, Lang Chen, Shuang-Feng Yin, Sheng-Lian Luo, and Chak-Tong Au. "3-(2-Hydroxyl-Ethyl)-1-propylimidazolium bromide immobilized on SBA-15 as efficient catalyst for the synthesis of cyclic carbonates via the coupling of carbon dioxide with epoxides." Catalysis Letters 135.4-3 (2010): 295-304.