Cover Page April-2012-Advanced Materials Letters

Advanced Materials Letters

Volume 3, Issue 2, Pages 149-153, April 2012
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Synthesis, Characterization And Catalytic Behaviour Of Entrapped Transition Metal Complexes Into The Zeolite-Y

Chetan K. Modi*, Parthiv M. Trivedi

Department of Chemistry, Bhavnagar University, Bhavnagar 364002, Gujarat, India

Adv. Mater. Lett., 2012, 3 (2), pp 149-153

DOI: 10.5185/amlett.2011.10313

Publication Date (Web): Apr 14, 2012

E-mail: chetank.modi1@gmail.com

Abstract

Zeolites encumbered with transition metal ions are promising heterogeneous catalysts. Knowledge about the location and structure of the metal centers is of paramount importance for the understanding of the catalytic potential of these materials. A series of entrapped transition metal complexes in the nanopores of zeolite-Y of the type [M(EVTCH)2]-Y [where M = Mn(II), Co(II), Ni(II) and Cu(II); ethylvanillin thiophene-2-carboxylic hydrazone (EVTCH)] have been synthesized by Flexible Ligand Method (FLM). These materials have been characterized by various physico-chemical techniques such as ICP-OES, GC-MS, elemental analyses, (FT-IR, 1H- and 13C-NMR and electronic) spectral studies, BET, scanning electron micrographs (SEMs) as well as X-ray diffraction patterns (XRD). The catalytic significance of these materials has been carried out over the liquid-phase hydroxylation of phenol with 30 % H2O2 to give catechol as a major product and hydroquinone as a minor product.

Keywords

Zeolite-Y, flexible ligand method, catalytic hydroxylation of phenol

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