Salicylaldiminato chromium complex supported on chemically modified silica as highly active catalysts for the oxidation of cyclohexene

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dc.contributor.authorTitinchi, Salam J.J.
dc.contributor.authorAbbo, Hanna S.
dc.date.accessioned2018-02-28T14:02:51Z
dc.date.available2018-02-28T14:02:51Z
dc.date.issued2013
dc.description.abstractImmobilization of chromium complexes on modified silica support was achieved via two different synthetic routes using 3-aminopropyl triethoxysilane (APTS) as a linking group. The FTIR spectra, elemental and solid-state NMR analyses demonstrated incorporation of amine functional groups on the surface of the APTS-functionalized silica support, which was further confirmed by 29 Si solid-state CP MAS NMR spectroscopy. Oxidation of cyclohexene was carried out over the chromium complex supported on organically modified silica using H2 O2 as an oxidant under various conditions and different atmospheres viz. oxygen, nitrogen and air. The supported catalysts exhibited excellent activity (>94%) after 6 h reaction time under O2 atmosphere using THF as solvent. The catalysts showed high chemoselectivity towards formation 2-cyclohexen-1-ol and 2-cyclohexen-1-one. Activity of the immobilized catalysts remains nearly the same after three consecutive cycles, suggesting the true heterogeneous nature of the catalyst.en_US
dc.description.accreditationWeb of Science
dc.identifier.citationTitinchi, S.J.J. & Abbo, H.S. (2013). Salicylaldiminato chromium complex supported on chemically modified silica as highly active catalysts for the oxidation of cyclohexene. Catalysis Today, 204: 114 – 124en_US
dc.identifier.issn0920-5861
dc.identifier.urihttp://dx.doi.org/10.1016/j.cattod.2012.08.040
dc.identifier.urihttp://hdl.handle.net/10566/3545
dc.language.isoenen_US
dc.privacy.showsubmitterFALSE
dc.publisherElsevieren_US
dc.rightsThis is the author-version of the article published online at: http://dx.doi.org/10.1016/j.cattod.2012.08.040
dc.status.ispeerreviewedTRUE
dc.subjectChromiumen_US
dc.subjectImmobilizationen_US
dc.subjectCyclohexene oxidationen_US
dc.subjectOxygenen_US
dc.subjectDavisil silicaen_US
dc.titleSalicylaldiminato chromium complex supported on chemically modified silica as highly active catalysts for the oxidation of cyclohexeneen_US
dc.typeArticleen_US

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