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Issue 2, 2013
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Comparison of the catalytic activity of MOFs and zeolites in Knoevenagel condensation

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Abstract

The catalytic behavior of metal–organic-frameworks (MOFs) CuBTC and FeBTC was investigated in Knoevenagel condensation of cyclohexane carbaldehyde and benzaldehyde with active methylene compounds and compared with zeolites BEA and TS-1. High yields were achieved over the CuBTC catalyst in the Knoevenagel condensation involving malonitrile, especially at a relatively low reaction temperature (80 °C); no leaching of the active phase was evidenced. In contrast, zeolites were not active under such reaction conditions. We propose an activation of malonitrile on a pair of adjacent Cu ions to explain the high catalytic activity of CuBTC with respect to conventional catalysts. Compared with CuBTC, zeolites exhibited usually lower selectivities, which is ascribed to a high acid strength of their active sites promoting consecutive reactions.

Graphical abstract: Comparison of the catalytic activity of MOFs and zeolites in Knoevenagel condensation

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Supplementary files

Article information


Submitted
20 Aug 2012
Accepted
02 Oct 2012
First published
04 Oct 2012

Catal. Sci. Technol., 2013,3, 500-507
Article type
Paper

Comparison of the catalytic activity of MOFs and zeolites in Knoevenagel condensation

M. Opanasenko, A. Dhakshinamoorthy, M. Shamzhy, P. Nachtigall, M. Horáček, H. Garcia and J. Čejka, Catal. Sci. Technol., 2013, 3, 500
DOI: 10.1039/C2CY20586F

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