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论文类型：期刊论文

发表时间：2011-01-01

发表刊物：GREEN CHEMISTRY

收录刊物：SCIE、Scopus

卷号：13

期号：3

页面范围：644-650

ISSN号：1463-9262

摘要：N-Heterocyclic carbene (NHC) functionalized MCM-41 was synthesized by reacting 1,3-bis-(4-allyl-2,6-diisopropylphenyl) imidazolium chloride with MCM-41 using 3-mercaptopropyltrimethoxysilane as silane coupling agent, and its CO(2) adduct (designated as MCM-41-IPr-CO(2)) was further synthesized by the reaction with CO(2). In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) was used to investigate the reversible CO(2) capture-release ability of MCM-41-NHC. MCM-41-IPr-CO(2) adduct proved to be an efficient heterogeneous catalyst for the cycloaddition of CO(2) to epoxides or aziridines with excellent regioselectivity under mild conditions. Moreover, the catalyst could be recovered easily through a simple filtration process and reused multiple times without obvious loss in activity, owing to CO(2) as protective group for effectively stabilizing the NHC anchored on MCM-41.