Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/8686
Título: Comparison of microwave and mechanochemical energy inputs in the catalytic oxidation of cyclohexane
Autor: Ribeiro, Ana P. C.
Alegria, Elisabete C. B. A.
Kopylovich, Maximilian N.
Ferraria, Ana M.
Rego, Ana M. Botelho do
Pombeiro, Armando J. L.
Palavras-chave: Microwave
Mechanochemical
Cyclohexane
Data: Mai-2018
Editora: Royal Society of Chemistry
Citação: RIBEIRO, Ana P. C.; [et al] – Comparison of microwave and mechanochemical energy inputs in the catalytic oxidation of cyclohexane. Dalton Transactions. ISSN 1477-9226. Vol. 47, N.º 25 (2018), pp. 8193-8198
Resumo: The effect of microwave and mechanochemical ball milling energy inputs was studied for the peroxidative oxidation (with aqueous H2O2) of cyclohexane to cyclohexanol and cyclohexanone, over CoCl2 and/or V2O5 dispersed (μm scale) catalysts. A maximum total yield of cyclohexanol and cyclohexanone of 43% after 1 h of reaction at 30 °C, in acetonitrile and under microwave irradiation (5 W), was achieved over the CoCl2–V2O5 (3 : 1) catalyst prepared by ball milling. Cyclohexanol is the main final product with a selectivity of up to 93% over cyclohexanone. Conducting the oxidation reaction under microwave irradiation under the same conditions but without any mechanochemical treatment of the catalyst prior to use resulted in a lower total yield of 30% with a lower selectivity (69%) towards cyclohexanol over cyclohexanone. The sole application of mechanochemical treatment for the catalyst preparation and the catalytic oxidation of cyclohexane allowed to reach yields of 29% after 1 h of reaction, at room temperature, without microwave irradiation and any additive and in the absence of any organic solvent. Ball milling is shown to provide a convenient, solvent-free method to disperse these solid catalysts and to promote the above cyclohexane oxidation, although, in the latter case, not so effectively as microwave irradiation.
Descrição: Este trabalho foi financiado pelo Concurso Anual para Projetos de Investigação, Desenvolvimento, Inovação e Criação Artística (IDI&CA) 2016 do Instituto Politécnico de Lisboa. Código de referência IPL/2016/MechSynCat_ISEL
Peer review: yes
URI: http://hdl.handle.net/10400.21/8686
DOI: 10.1039/c8dt00866c
ISSN: ‎1477-9226
1477-9234
Versão do Editor: http://pubs.rsc.org/en/content/articlepdf/2018/dt/c8dt00866c?page=search
Aparece nas colecções:ISEL - Eng. Quim. Biol. - Artigos

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