Please use this identifier to cite or link to this item: https://scholarhub.balamand.edu.lb/handle/uob/2380
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dc.contributor.authorQasim, Hafiz M.en_US
dc.contributor.authorAyass, Wassim W.en_US
dc.contributor.authorDonfack, Patriceen_US
dc.contributor.authorMougharbel, Ali S.en_US
dc.contributor.authorBhattacharya, Sauraven_US
dc.contributor.authorNisar, Talhaen_US
dc.contributor.authorBassil, Bassemen_US
dc.date.accessioned2020-12-23T09:12:12Z-
dc.date.available2020-12-23T09:12:12Z-
dc.date.issued2019-
dc.identifier.urihttps://scholarhub.balamand.edu.lb/handle/uob/2380-
dc.description.abstractThe class of peroxo-cerium-containing polyoxometalates has been discovered via the synthesis of the 9-peroxo-6-cerium(IV)-containing 30-tungsto-3-germanate, [CeIV6(O2)9(GeW10O37)3]24– (1). Polyanion 1 consists of a cyclic [Ce6(O2)9]6+ assembly that is stabilized by three dilacunary [GeW10O37]10– Keggin fragments. The title polyanion 1 is solution-stable, on the basis of 183W nuclear magnetic resonance, and was shown to act as a recyclable homogeneous catalyst for the selective, microwave-activated sulfoxidation of the model substrate methionine to the sulfoxide in the absence and to the sulfone in the presence of hydrogen peroxide. Solution and solid-state Raman as well as solid-state infrared studies of 1 demonstrated the complete loss (and regain) of the nine peroxo groups in situ during the catalytic cycle, suggesting that the peroxo-free {Ce6(GeW10)3} skeleton remains most likely intact during the catalytic cycle. Solid-state X-ray photoelectron spectroscopy measurements showed that peroxo loss is accompanied by reduction of the cerium ions from +4 to +3, which is fully reversible. Density functional theory calculations are in complete agreement with all of these observations and furthermore suggest that the reduction of the six cerium(IV) ions is accompanied by the formation of molecular dioxygen.en_US
dc.language.isoengen_US
dc.titlePeroxo-cerium(IV)-containing polyoxometalates: [CeIV6(O2)9(GeW10O37)3]24–, a recyclable homogeneous oxidation catalysten_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1021/acs.inorgchem.9b01164-
dc.contributor.affiliationDepartment of Chemistryen_US
dc.description.volume58en_US
dc.description.issue17en_US
dc.description.startpage11300en_US
dc.description.endpage11307en_US
dc.date.catalogued2020-02-18-
dc.description.statusPublisheden_US
dc.identifier.ezproxyURLhttp://ezsecureaccess.balamand.edu.lb/login?url=https://doi.org/10.1021/acs.inorgchem.9b01164en_US
dc.identifier.OlibID252415-
dc.relation.ispartoftextJournal of inorganic chemistryen_US
dc.provenance.recordsourceOliben_US
Appears in Collections:Department of Chemistry
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