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dc.contributor.author | Faria, Emerson Henrique de | |
dc.contributor.author | Ricci, Gustavo P. | |
dc.contributor.author | Marçal, Liziane | |
dc.contributor.author | Nassar, Eduardo J. | |
dc.contributor.author | Vicente Rodríguez, Miguel Ángel | |
dc.contributor.author | Trujillano Hernández, Raquel | |
dc.contributor.author | Gil, Antonio | |
dc.contributor.author | Korili, S.A. | |
dc.contributor.author | Ciuffi, Katia J. | |
dc.contributor.author | Calefi, Paulo S. | |
dc.date.accessioned | 2022-10-27T11:33:24Z | |
dc.date.available | 2022-10-27T11:33:24Z | |
dc.date.issued | 2012 | |
dc.identifier.issn | 0920-5861 | |
dc.identifier.uri | http://hdl.handle.net/10366/150911 | |
dc.description.abstract | The immobilization of Fe(III) picolinate and Fe(III) dipicolinate complexes on kaolinite furnished heterogeneous catalysts, whose catalytic activity was evaluated. The precursor materials were kaolinite grafted with picolinic (Ka-pa) and dipicolinic (Ka-dpa) acids obtained by melting of the pyridine carboxylic acids. To obtain the catalysts Fe(Ka-pa)-n and Fe(Ka-dpa)-n (n = 1, 2, or 3 is the ligand/Fe ratio), the precursors were suspended in Fe3+ solutions with cation/ligand ratios of 1:1, 1:2, or 1:3. The resulting materials were characterized by thermal analyses (simultaneous TG/DTA), X-ray diffraction, UV/vis and infrared spectroscopies, and transmission electron microscopy. The grafted complexes were employed as heterogeneous catalysts in the epoxidation of cis-cyclooctene to cis-cyclooctenoxide and in the oxidation of cyclohexane to cyclohexanol and cyclohexanone at ambient temperature and pressure. Hydrogen peroxide was used as oxygen donor at a catalyst/oxidant/substrate molar ratio of 1:300:100. Fe(Ka-pa)-n catalysts were very efficient for cis-cyclooctene epoxidation (38% conversion). For cyclohexane oxidation, Fe(Ka-dpa)-n was 100% selective for cyclohexanone formation, with substrate conversion of 14%. This last series of catalysts was also very effective in the Baeyer–Villiger reaction, with 60% substrate conversion and 100% selectivity for ξ-caprolactone. After reuse (5 times), the catalysts still led to high substrate conversion. | es_ES |
dc.language.iso | eng | es_ES |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Kaolinite | es_ES |
dc.subject | Heterogeneous catalysis | es_ES |
dc.subject | Fe(III)–picolinates and dipicolinates | es_ES |
dc.subject | Oxidation reactions | es_ES |
dc.subject | Baeyer–Villiger | es_ES |
dc.title | Green and selective oxidation reactions catalyzed by kaolinite covalently grafted with Fe(III) pyridine-carboxylate complexes | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.relation.publishversion | https://doi.org/10.1016/j.cattod.2011.11.029 | es_ES |
dc.subject.unesco | 2303 Química Inorgánica | es_ES |
dc.identifier.doi | 10.1016/j.cattod.2011.11.029 | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |
dc.journal.title | Catalysis Today | es_ES |
dc.volume.number | 187 | es_ES |
dc.issue.number | 1 | es_ES |
dc.page.initial | 135 | es_ES |
dc.page.final | 149 | es_ES |
dc.type.hasVersion | info:eu-repo/semantics/publishedVersion | es_ES |