期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 184, 期 8, 页码 2009-2016出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2011.05.035
关键词
Polymer-inorganic hybrid material; SiO2-Al2O3; Polymeric composite; Basic catalyst
资金
- Islamic Azad University, Shahreza Branch (IAUSH) Research Council and Center of Excellence in Chemistry
In this work, Al2O3 was mixed with SiO2 and poly 4-vinylpyridine by the sol-gel method in order to make a composite which is used as a heterogeneous basic catalyst for Knoevenagel condensation reaction. The physical and chemical properties of the composite catalyst were investigated by XRD, TG, BET and SEM techniques. The catalytic performance of each material was determined for the Knoevenagel condensation reaction between carbonyl compound and malononitrile. The reactions were performed in solvent-free conditions and the product was obtained in high yield and purity after a simple work-up. The effects of the amount of catalyst, amount of monomer for the synthesis of composite and recyclability of the heterogeneous composite were investigated. The composite catalyst used for this synthetically useful transformation showed considerable level of reusability besides very good activity. (C) 2011 Elsevier Inc. All rights reserved.
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