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Indexed by:期刊论文

Date of Publication:2011-01-01

Journal:GREEN CHEMISTRY

Included Journals:SCIE、Scopus

Volume:13

Issue:3

Page Number:644-650

ISSN No.:1463-9262

Abstract: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.