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Vanadium(V) complexes supported on porous MIL-100(Fe) as catalysts for the selective oxidation of toluene

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Resumo:The vanadium(V) complexes bearing the aroylhydrazone Schiff base 2-hydroxy-N'-((2-hydroxynaphthalen-1-yl) methylene)benzohydrazide ligand [VO(OMe)L] (1) and [Et3NH][VO2L] (2) were synthesized, characterized and supported on porous MIL-100(Fe) forming the 1@MIL-100(Fe) and 2@MIL-100(Fe) composites. The outcome of such immobilizations was assessed by several characterization techniques, namely powder X-ray diffraction, UV/ Vis, FTIR, SEM-EDS, ICP and BET surface area analysis, confirming the successful heterogenization of both va-nadium complexes. They were screened as catalysts towards the oxidation of toluene, under homogenous (1 and 2) and heterogeneous (1@MIL-100 and 2@MIL-100) conditions. The influence of several parameters, namely the type and amount of catalyst or oxidant, reaction time, temperature, and radical trapping, was studied. The main products obtained were benzaldehyde, benzyl alcohol and benzoic acid. Under the optimized conditions, using 1 and 2 as homogeneous catalysts, total yields of 19 and 23%, respectively, were achieved at 80 degrees C after 6 h. Using 1@MIL100(Fe) and 2@MIL100(Fe) composites under heterogeneous conditions, total yields up to 11% after 24 h, were achieved.
Autores principais:Sutradhar, Manas
Outros Autores:Marques, Guilherme; Soliman, Mohamed M. A.; Guedes Da Silva, M. Fátima C.; Flores, Daniela S. S.; Granadeiro, Carlos; Balula, Salete; Pombeiro, Armando; Alegria, Elisabete
Assunto:Vanadium(V) complexes VOCs MIL-100(Fe) Heterogeneous catalysts Toluene oxidation
Ano:2022
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso restrito
Instituição associada:Instituto Politécnico de Lisboa
Idioma:inglês
Origem:Repositório Científico do Instituto Politécnico de Lisboa

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