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论文类型：期刊论文

发表时间：2014-05-20

发表刊物：APPLIED CATALYSIS A-GENERAL

收录刊物：SCIE、EI、Scopus

卷号：478

页面范围：81-90

ISSN号：0926-860X

关键字：Size and shape-selective catalysis; Metal-organic framework; Cu-3(BTC)(2) nanocavities; Amino-functionalized basic ionic liquid; Immobilization

摘要：A novel molecular size- and shape-selective catalyst, microporous metal-organic framework HKUST-1 immobilized amino-functionalized basic ionic liquid (ABIL-OH), was synthesized by facile impregnation and activation. Characterizations and catalytic results revealed that the catalytically active species ABIL-OH could be confined in well-defined HKUST-1 nanocavities via Cu-NH2 coordination bond. The resulting ABIL-OH/HKUST-1 heterogeneous catalyst showed comparable catalytic activity and enhanced selectivity in liquid phase Knoevenagel condensation, and it could be recovered conveniently and reused at least 5 times without significant loss of its catalytic efficiency. Moreover, ABIL-OH/HKUST-1 catalyst demonstrated distinct size- and shape-selective properties for discrimination of reactants in Knoevenagel condensation. It was supposed that diffusion kinetics of reactants might be controlling step and play a more important role than the nature of the substituents in the confined microenvironment. (C) 2014 Elsevier B.V. All rights reserved,