Oxido-and dioxido-vanadium(V) complexes supported on carbon materials: Reusable catalysts for the oxidation of cyclohexane

Manas Sutradhar, Marta A. Andrade, Sónia A.C. Carabineiro, Luísa M. D. R. S. Martins, Maria de Fátima C. Guedes da Silva, Armando J. L. Pombeiro

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Abstract

Oxidovanadium(V) and dioxidovanadium(V) compounds, [VO(OEt)L] (1) and [Et3NH][VO2L] (2), were synthesized using an aroylhydrazone Schiff base (5-bromo-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (H2L). They were characterized by elemental analysis, Fourier-transform infrared spectroscopy (FT-IR), (1H and51V) nuclear magnetic resonance (NMR), electrospray ioniza-tion mass spectrometry (ESI-MS) and single crystal X-ray diffraction analyses. Both complexes were immobilized on functionalized carbon nanotubes and activated carbon. The catalytic performances of 1 and 2, homogenous and anchored on the supports, were evaluated for the first time towards the MW-assisted peroxidative oxidation (with tert-butylhydroperoxide, TBHP) of cyclohexane under heterogeneous conditions. The immobilization of 1 and 2 on functionalized carbon materials improved the efficiency of catalytic oxidation and allowed the catalyst recyclability with a well-preserved catalytic activity.

Original languageEnglish
Article number1456
JournalNanomaterials
Volume11
Issue number6
DOIs
Publication statusPublished - Jun 2021

Keywords

  • Aroylhydrazone
  • Carbon materials
  • Heterogeneous catalysis
  • Microwave-assisted oxidation
  • Oxidovanadium(V) complexes
  • X-ray structure

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