gamma-1,2-H2SiV2W10O40] immobilized on surface-modified SiO2 as a heterogeneous catalyst for liquid-phase oxidation with H2O2

Chemistry : a European Journal
Jun KasaiNoritaka Mizuno

Abstract

An organic-inorganic hybrid support has been synthesized by covalently anchoring an N-octyldihydroimidazolium cation fragment onto SiO2 (denoted as 1-SiO2). This modified support was characterized by solid-state 13C, 29Si, and 31P NMR spectroscopy, IR spectroscopy, and elemental analysis. The results showed that the structure of the dihydroimidazolium skeleton is preserved on the surface of SiO2. The modified support can act as a good anion exchanger, which allows the catalytically active polyoxometalate anion [gamma-1,2-H2SiV2W10O40]4- (I) to be immobilized onto the support by a stoichiometric anion exchange (denoted as I/1-SiO2). The structure of anion I is preserved after the anion exchange, as confirmed by IR and 51V NMR spectroscopy. The catalytic performance for the oxidation of olefins and sulfides, with hydrogen peroxide (only one equivalent with respect to substrate) as the sole oxidant, was investigated with I/1-SiO2. This supported catalyst shows a high stereospecificity, diastereoselectivity, regioselectivity, and a high efficiency of hydrogen peroxide utilization for the oxidation of various olefins and sulfides without any loss of the intrinsic catalytic nature of the corresponding homogeneous analogue of I (i.e.,...Continue Reading

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Citations

Jul 15, 2015·Inorganic Chemistry·Faiza BentalebRichard Villanneau
Apr 11, 2009·Solid State Nuclear Magnetic Resonance·Bernadeta WalaszekGerd Buntkowsky
Mar 3, 2018·Nanomaterials·Saioa Aguado-UretaJuan M Gutiérrez-Zorrilla
Mar 21, 2015·Physical Chemistry Chemical Physics : PCCP·Maria PetrovaPeter Hesemann
Apr 2, 2008·Chemical Communications : Chem Comm·Luc AlaertsDirk E De Vos
May 7, 2010·Chemistry : a European Journal·Anna GrünbergGerd Buntkowsky
May 11, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Keigo KamataNoritaka Mizuno
Apr 27, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Charlie Van DoorslaerDirk De Vos
Jul 22, 2010·Nanoscale·Gaëlle CharronTalal Mallah
Jul 12, 2012·Chemical Society Reviews·Anna ProustGuillaume Izzet
May 25, 2010·Chemistry : a European Journal·Florian JakobThorsten Bach
May 16, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Lucie S NogueiraSalete S Balula
Aug 19, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Yuanyuan ZhaoLixin Wu
May 13, 2015·Chemical Reviews·Sa-Sa Wang, Guo-Yu Yang

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