Synthesis, spectral investigation and catalytic aspects of entrapped VO(IV) and Cu(II) complexes into the supercages of zeolite-Y

[Display omitted] •We have synthesized VO(IV) and/or Cu(II) based neat and their entrapped complexes into the supercages of zeolite-Y.•The comparative spectroscopic, thermal, morphological and crystalline properties of these complexes were achieved.•Their catalytic activities were tested over oxidat...

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Published in:	Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 140; pp. 174 - 184
Main Authors:	Modi, Chetan K., Gade, Bhagyashree G., Chudasama, Jiten A., Parmar, Digvijay K., Nakum, Haresh D., Patel, Arun L.
Format:	Journal Article
Language:	English
Published:	England Elsevier B.V 05-04-2015
Subjects:	Catalysis Coordination Complexes - chemical synthesis Coordination Complexes - chemistry Copper - chemistry Cyclohexenes - chemistry Oxidation of limonene Oxidation-Reduction Pyrazolone based Schiff base ligand Pyrazolones - chemical synthesis Pyrazolones - chemistry Schiff Bases - chemical synthesis Schiff Bases - chemistry Terpenes - chemistry Vanadates - chemical synthesis Vanadates - chemistry Zeolite-Y entrapped complexes Zeolites - chemical synthesis Zeolites - chemistry Pyrazolone based Schiff base ligand Zeolite-Y entrapped complexes Oxidation of limonene
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Summary:	[Display omitted] •We have synthesized VO(IV) and/or Cu(II) based neat and their entrapped complexes into the supercages of zeolite-Y.•The comparative spectroscopic, thermal, morphological and crystalline properties of these complexes were achieved.•Their catalytic activities were tested over oxidation of limonene reaction using 30% H2O2 as oxidizing agent.•Among them [VO(L)H2O]-Y catalyst shows higher catalytic activity with limonene glycol selectivity. VO(IV) and Cu(II) complexes with Schiff base ligand derived from 1-phenyl-3-methyl-4-formyl-2-pyrazolin-5-one (PMFP) and 2-amino phenol have been synthesized as their neat and entrapped complexes into the supercages of zeolite-Y. The compounds were characterized by chemical analysis (ICP-OES and elemental), electronic and/or UV reflectance spectra, FTIR spectroscopy, X-ray powder diffraction patterns, SEMs, BET and thermogravimetric (TG) analysis. All the prepared catalysts were tested on the liquid phase limonene oxidation reaction, using 30% H2O2 as an oxidant. Limonene glycol, carveol, carvone and limonene 1,2-epoxide were the main products obtained. It was observed that zeolite-Y entrapped complexes exhibited higher catalytic activity than neat complexes. The catalysts undergo no metal leaching and can be easily recovered and reused. The use of inexpensive catalyst and oxidant are significant practical advantages of this environmentally friendly process.
ISSN:	1386-1425 1873-3557
DOI:	10.1016/j.saa.2014.12.028