Journal
RSC ADVANCES
Volume 3, Issue 20, Pages 7570-7578Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra40183a
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- CSIR
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The objective of this work is to prepare a cheap and highly stable heterogeneous catalyst. This was done by a simple two step approach. The first step involved the preparation of an organic-inorganic hybrid material by covalent grafting of amines on K10 montmorillonite. In the second step the N atoms of the amine groups were co-ordinated to Cu and Ni ions. Both the covalent and co-ordination forces are strong enough to make the catalyst fairly stable during the catalytic runs. The amine functionalization was confirmed by Si-29 CP MAS NMR spectroscopy, FTIR spectroscopy and XPS analysis. The XPS analysis revealed Cu and Ni were present in their +2 oxidation states. This bimetallic system was discovered somewhat by curiosity when Ni was added to a previously well-established Cu catalyzed C-S coupling reaction in an attempt to enhance the catalytic activity. When this catalyst was employed in the C-S coupling reaction, it showed wonderful activity with 99% product yield, due to the synergistic effect of the metal duo.
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