Well-Defined Highly Active Heterogeneous Catalyst System for the Coupling Reactions of Carbon Dioxide and Epoxides |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China;2. School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China;3. Department of Chemical Sciences Faculty of Basic Medical and Applied Sciences, Lead City University, Ibadan, Nigeria |
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| Abstract: | The poly(4-vinylpyridine)-supported zinc halide catalysts, prepared from a reaction of ZnX2 and poly(4-vinylpyridine), exhibit high selectivity and activity for the coupling reaction of CO2 and ethylene oxide or propylene oxide. Solid NMR characterization of the poly(4-vinylpyridine)-supported ZnBr2 catalyst and its reaction product with propylene oxide and/or CO2 show that a pyridinium-alkoxy ion-bridged zinc bromide complex is functioning as an active species, such as in the homogeneous catalysis with L2ZnBr2 (L = pyridine or methyl-substituted pyridine). |
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