@article { ISI:000253450900068,
	title = {Alkene epoxidation catalyzed by vanadomolybdophosphoric acids supported on hydrated titania},
	journal = {Catalysis Communications},
	volume = {9},
	number = {5},
	year = {2008},
	month = {MAR},
	pages = {931-938},
	publisher = {ELSEVIER SCIENCE BV},
	type = {Article},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>Vanadomolybdophosphoric acids wet-impregnated oil hydrated titania (TiO(2) - xH(2)O), make ail efficient catalytic system for the epoxidation of a variety of alkenes with organic solvent extracted TBHP as the oxidant. By,in appropriate choice of solvent, the catalyst call be reused at least three times without much loss in the activity for subsequent runs. XRD shows that the heteropoly acid is uniformly dispersed over the support and up to 15 wt\% loading of the heteropoly acid, no additional peak of the same call be seen in the XRD pattern of the catalyst. The reactivity varied with the nature of alkene but the major product was always the corresponding epoxide. The catalytic system is free of high temperature calcination steps and tedious multi-step procedures, normally encountered in the heter-ogenization of heteropoly acids. (c) 2007 Elsevier B.V. All rights reserved.</p>},
	keywords = {alkenes, epoxidation, heteropoly acids, TBHP, titania, vanadomolybdophosphoric acids},
	issn = {1566-7367},
	doi = {10.1016/j.catcom.2007.09.022},
	author = {Ingle, Rohit H. and Vinu, A. and Halligudi, Shivaraj B.}
}
@article { ISI:000260803700002,
	title = {Lacunary Keggin type polyoxotungstates in conjunction with a phase transfer catalyst: an effective catalyst system for epoxidation of alkenes with aqueous H2O2},
	journal = {Journal of Molecular Catalysis A-Chemical},
	volume = {294},
	number = {1-2},
	year = {2008},
	month = {OCT},
	pages = {8-13},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>Na-9[SbW9O33] in conjunction with a phase transfer catalyst (methyl tricapryl ammonium chloride) is a highly efficient catalytic system for the selective epoxidation of alkenes with aqueous H2O2 as the oxidant. Importantly, the reactions can be carried out in the absence of any organic solvents. The alkene epoxidation reactions with both, a transition metal ion substituted polyoxotungstate as well as a transition metal ion free polyoxotungstate precursor indicates that the tungstate group is the active center for the oxidation reaction. It was also observed that the transition metal ion does not play any significant role in the reaction. IR studies support the formation of tungsten-peroxo species and also show that the catalyst is stable in the presence of phase transfer catalyst when aqueous H2O2 is used as an oxidant. (C) 2008 Elsevier B.V. All rights reserved.</p>},
	keywords = {alkenes, Aqueous H2O2, epoxidation, Na-9[SbW9O33], Phase transfer catalyst, polyoxometalates},
	issn = {1381-1169},
	doi = {10.1016/j.molcata.2008.07.003},
	author = {Ingle, Rohit H. and Raj, N. K. Kala}
}
