期刊
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷 210, 期 1-2, 页码 31-34出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2003.09.010
关键词
carbon dioxide; cyclic carbonates; epoxide; coupling; Schiff-base aluminum complexes
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 A1(3+) 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. (C) 2003 Elsevier B.V. All rights reserved.
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