Chemical fixation of carbon dioxide to cyclic carbonates under extremely mild conditions with highly active bifunctional catalysts |
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Authors: | Xiao-Bing Lu Ying-Ju Zhang Bin Liang Xiao Li Hui Wang |
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Institution: | State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, PR China |
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Abstract: | Chemical fixation of carbon dioxide to cyclic carbonates proceeds effectively under extremely mild temperature and pressure by using a bifunctional nucleophile–electrophile catalyst system of tetradentate Schiff-base aluminum complexes ((Salen)AlX) in conjunction with a quaternary ammonium salt (n-Bu4NY) in the absence of any organic solvent. Electrophilicity of central Al3+ ion and the steric factor of substituent groups on the aromatic rings of (Salen)AlX (electrophile), and nucleophilicity and leaving ability of the anion Y− of n-Bu4NY (nucleophile) have a great effect on the catalytic activity of the bifunctional catalyst. |
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Keywords: | Carbon dioxide Cyclic carbonates Epoxide Coupling Schiff-base aluminum complexes |
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