Porphyrins entrapped in an alumina matrix

dc.creatorde Lima, OJ
dc.creatorde Aguirre, DP
dc.creatorde Oliveira, DC
dc.creatorda Silva, MA
dc.creatorMello, C
dc.creatorLeite, CAP
dc.creatorSacco, HC
dc.creatorCiuffi, KJ
dc.date2001
dc.date2014-11-13T22:25:36Z
dc.date2015-11-26T17:11:52Z
dc.date2014-11-13T22:25:36Z
dc.date2015-11-26T17:11:52Z
dc.date.accessioned2018-03-29T00:00:20Z
dc.date.available2018-03-29T00:00:20Z
dc.identifierJournal Of Materials Chemistry. Royal Soc Chemistry, v. 11, n. 10, n. 2476, n. 2481, 2001.
dc.identifier0959-9428
dc.identifierWOS:000171470500013
dc.identifier10.1039/b100897h
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/81445
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/81445
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/81445
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1281199
dc.descriptionNovel hybrid organic-inorganic catalysts constituted by iron( III) or manganese( III) 5,10,15,20-tetrakis(pentafluorophenyl) porphyrin entrapped in an alumina amorphous matrix have been prepared. The hybrid materials were obtained by a non-hydrolytic sol-gel route, through the condensation of aluminium chloride with diisopropyl ether in the presence of metalloporphyrin. The presence of the metalloporphyrin entrapped in the alumina matrix is confirmed by ultraviolet-visible spectroscopy and electron spectroscopic imaging. The material was also analysed by infrared spectroscopy, selected area diffraction, scanning electron microscopy, thermogravimetric analysis and differential thermal analysis, and its surface area was determined. Comparison between the leaching of metalloporphyrin from non-hydrolytic materials and adsorbed metalloporphyrin on commercial neutral alumina confirms that in the non-hydrolytic materials the metalloporphyrin is entrapped and not just adsorbed on the alumina surface. The use of a conventional hydrolytic sol-gel process leads to the complete leaching of the metalloporphyrin from the matrix, underlining the importance of the non-hydrolytic alumina gel process in the matrix preparation. The prepared alumina matrix materials are amorphous, even after heat treatment up 270 degreesC. The new catalysts prepared were tested for their ability to catalyse the epoxidation of (Z)-cyclooctene using iodosylbenzene as oxygen donor, giving high yields in the epoxidation, similar to those obtained using the metalloporphyrin in solution or supported on a silica matrix.
dc.description11
dc.description10
dc.description2476
dc.description2481
dc.languageen
dc.publisherRoyal Soc Chemistry
dc.publisherCambridge
dc.publisherInglaterra
dc.relationJournal Of Materials Chemistry
dc.relationJ. Mater. Chem.
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectSol-gel Process
dc.subjectIron(iii)
dc.subjectOxidation
dc.subjectCatalysts
dc.subjectMetalloporphyrins
dc.subjectEpoxidation
dc.subjectActivation
dc.subjectComplexes
dc.subjectCleavage
dc.titlePorphyrins entrapped in an alumina matrix
dc.typeArtículos de revistas


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