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Keggin heteropolyacids Mo-based as catalysts in the green and selective oxidation of diphenyl sulfide
(Elsevier, 2013-03)
Heteropolyacids are used as redox catalysts due to their bifunctional properties. Some advantages over conventional catalysts, such as selectivity, easy isolation and reuse, are worth noting. In homogeneous conditions their ...
Direct Irradiaton of Aryl Sulfides: Homolytic Fragmentation and Sensitized S-Oxidation
(American Chemical Society, 2017-09)
The direct irradiation of diphenyl sulfide and p-substituted thioanisoles in the presence of oxygen was investigated by means of both steady state and laser flash photolysis experiments. Two competitive pathways took place ...
Catalytic behavior of the WOx-ZrO2 system in the clean selective oxidation of diphenyl sulfide (DPS)
(Elsevier Science, 2021-07-12)
WOx-ZrO2 (ZWx) based catalysts were prepared by equilibrium adsorption in basic condition (pH 10) with W content of 10.5, 19.7 and 27.0 wt.%, using hydrous zirconia [ZrO2(383)] as support. In order to determine the soluble ...
Novel catalyst based on mono- and di-vanadium substituted Keggin polyoxometalate incorporated in poly(acrylic acid-co-acrylamide) polymer for the oxidation of sulfides
(Elsevier Science, 2018-10)
Composite materials based on [PVxW12-xO40](3+x)− with x = 1 or 2 (PVW and PV2W respectively), included in poly(acrylic acid-co-acrylamide) gel (PAACA), were synthesized. The samples were characterized by different techniques ...
Design of Fe-modified mesoporous nanostructures as efficient catalysts for microwave-assisted selective oxidations of sulfides
(Elsevier Science, 2021-04-05)
Redox catalysts modified with Fe were synthesized via wet impregnation of metal species loaded on SBA-15. The influence of a number of Fe precursors with distinctive counter-ions on the deposited metal species was studied. ...
A green and reusable catalytic system based on silicopolyoxotungstovanadates incorporated in a polymeric material for the selective oxidation of sulfides to sulfones
(Elsevier Science, 2021-01)
Two vanadium-containing Keggin silicopolyoxotungsto compounds K5SiVW11O40 and K6SiV2W10O40 were synthesized and characterized. They were incorporated in a superporous hydrogel constitute by prop-2-enamide and propenoic ...
Molybdenum-containing systems based on natural kaolinite as catalysts for selective oxidation of aromatic sulfides
(Elsevier Science, 2017-12)
A natural kaolinite from Argentinean deposits, converted into metakaolin by thermal treatment at 823 K and chemically modified, was used as a support for catalysts containing iso- and heteropolyanions (POMs and HPOMs) such ...
Novos sulfetos e sulfonas fluorescentes: síntese e estudo das propriedades fotofísicas
(Universidade Federal de Santa MariaBRQuímicaUFSMPrograma de Pós-Graduação em Química, 2012-08-03)
In this study, we performed the synthesis of new symmetrical vinyl sulfides 2-4 by Wittig-Horner reaction of aldehydes derived from diphenyl-, triphenylamine and carbazole with bis[(diphenylphosphinyl)methyl]sulfide 1. The ...
Hidrotiolação regio e estereosseletiva de sistemas diínos: síntese e reatividade de (Z)-tioeninos
(Universidade Federal de Santa MariaBrasilQuímicaUFSMPrograma de Pós-Graduação em QuímicaCentro de Ciências Naturais e Exatas, 2022-03-10)
Sulfur compounds are important building blocks in Organic Chemistry. The class of vinyl sulfides stands out for its versatility and applicability in the synthesis of new structures. Due to the relevance of these compounds, ...
Synthesis of (Z)-1-Organylthiobut-1-en-3-ynes: Hydrothiolation of Symmetrical and Unsymmetrical Buta-1,3-diynes
(GEORG THIEME VERLAG KG, 2009)
Hydrothiolation of 1-organylbuta-1,3-diynes and 1,4-diorganylbuta-1,3-diynes with the sodium organylthiolate anions, which were generated in situ by reacting diphenyl and dibutyl disulfide with NaBH(4) in ethanol, results ...