Abstract
Pyridine-containing anion-based ionic liquids (PA-ILs) with two kinds of interaction sites to bind CO2, e.g., [P4444][2-OP], were found to be highly efficient for catalysing the cycloaddition reactions of atmospheric CO2 with epoxides at room temperature under metal- and halogen-free conditions, producing a series of cyclic carbonates in high yields. It was demonstrated that the cooperative interaction from two interaction sites in the anions of PA-ILs activated CO2, while the cation activated the epoxides substrates via coordination to the central P+ unit, thus resulting in the high activity of the IL catalysts.
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This work was supported by the National Natural Science Foundation of China (21403252, 21533011), and the Chinese Academy of Sciences (QYZDY-SSW-SLH013).
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Yuan, G., Zhao, Y., Wu, Y. et al. Cooperative effect from cation and anion of pyridine-containing anion-based ionic liquids for catalysing CO2 transformation at ambient conditions. Sci. China Chem. 60, 958–963 (2017). https://doi.org/10.1007/s11426-016-0507-7
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DOI: https://doi.org/10.1007/s11426-016-0507-7