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https://hdl.handle.net/1822/72834
Título: | Electrochemical and catalytic studies of a Manganese(III)Complex with a Tetradentate Schiff-Base Ligand Encapsulated in NaY Zeolite |
Autor(es): | Kuzniarska-Biernacka, Iwona Rodrigues, Otília Carvalho, M. Alice Parpot, Pier Biernacki, Krzysztof Magalhaes, Alexandre Lopes Fonseca, A. M. Neves, Isabel C. |
Palavras-chave: | Electrochemistry Heterogeneous catalysis Oxidation Zeolites Manganese Alkenes |
Data: | 2013 |
Editora: | Wiley |
Revista: | European Journal of Inorganic Chemistry |
Citação: | Kuźniarska‐Biernacka, I., Rodrigues, O., Carvalho, M. A., Parpot, P., et al.(2013). Electrochemical and catalytic studies of a manganese (III) complex with a tetradentate Schiff‐base ligand encapsulated in NaY zeolite. European Journal of Inorganic Chemistry, 2013(15), 2768-2776 |
Resumo(s): | The manganese(III) complex with a Schiff-base salen-type ligand (1,5-bis{[(1E)-(2-hydroxyphenyl)methylene]amino}-1H-imidazole-4-carbonitrile) has been encapsulated in the nanopores of a Y zeolite by using two different methodologies, the flexible ligand and in situ complex preparation methods. Cyclic voltammetry studies revealed that the neat complex undergoes reversible oxidation in dmf, which has been attributed to the MnII/III redox couple, whereas the two heterogeneous catalysts show different electrochemical behaviour in aqueous medium. The encapsulated and non-encapsulated homogeneous MnIIIsalen complexes were screened as catalysts for olefin oxidation by using tBuOOH as the oxygen source in different solvents. Under the optimized conditions, the catalysts exhibited moderate activity. Both heterogeneous catalysts catalysed the oxidation of cyclohexene with tBuOOH, primarily to give the allylic oxidation products. These catalysts were found to be reusable after the catalytic cycle, but with some loss of activity. A DFT study confirmed the distortion of the complex in the zeolite cage, the main difference being observed for the bonded chloride. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/72834 |
DOI: | 10.1002/ejic.201201517 |
ISSN: | 1434-1948 |
e-ISSN: | 1099-0682 |
Versão da editora: | https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/ejic.201201517 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2013EurJInorgChem2768.pdf Acesso restrito! | 759,48 kB | Adobe PDF | Ver/Abrir |