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

• Published in: Catalysis letters Vol. 135; no. 3-4; pp. 295 - 304
• Main Authors: Dai, Wei-Li, Chen, Lang, Yin, Shuang-Feng, Luo, Sheng-Lian, Au, Chak-Tong
• Format: Journal Article
• Language: English
• Published: Boston Boston : Springer US 01.04.2010; Springer US; Springer; Springer Nature B.V
• Subjects: Carbon dioxide; Carbonates; Catalysis; Catalysts; Chemical synthesis; Chemistry; Chemistry and Materials Science; Colloidal state and disperse state; Coupling (molecular); Cycloaddition; Exact sciences and technology; General and physical chemistry; Grafting; Hydroxides; Industrial Chemistry/Chemical Engineering; Molecular sieves; Organic chemistry; Organometallic Chemistry; Physical Chemistry; Porous materials; Reaction mechanisms; Selectivity; Silicon dioxide; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Thermal stability; Hydroxyl ionic liquids; Cyclic carbonate; SBA-15; Carbon dioxide; Epoxide; Binary compound; Catalytic reaction; Selectivity; Porous material; Grafting; Silica; Mesoporosity; Molecular sieve; Ionic liquid; Heterogeneous catalysis; Synthesis; Silicon oxides; Solvent free reaction; Bromides; Reaction mechanism; Carbonates; Catalyst; Hydroxyl
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-010-0285-4

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. Graphical Abstract 3-(2-hydroxyl-ethyl)-1-propylimidazolium bromide (HEPIMBr) was immobilized on SBA-15 mesoporous molecular sieve by chemical grafting method. It was found the material shows high catalytic efficiency and good stability towards the cyclic carbonates synthesis via. Cycloaddition of CO₂ to epoxides. Moreover, the catalyst can be easily separated from the product. A plausible reaction mechanism has been proposed for the catalytic action. [graphic removed]