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Oxido- and Dioxido-Vanadium(V) Complexes Supported on Carbon Materials: Reusable Catalysts for the Oxidation of Cyclohexane.

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 and 51V) nuclear magnetic resonance (NMR), electrospray ionization 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.

SUBMITTER: Sutradhar M 

PROVIDER: S-EPMC8230237 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature

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Oxido- and Dioxido-Vanadium(V) Complexes Supported on Carbon Materials: Reusable Catalysts for the Oxidation of Cyclohexane.

Sutradhar Manas M   Andrade Marta A MA   Carabineiro Sónia A C SAC   Martins Luísa M D R S LMDRS   Guedes da Silva Maria de Fátima C MFC   Pombeiro Armando J L AJL  

Nanomaterials (Basel, Switzerland) 20210531 6

Oxidovanadium(V) and dioxidovanadium(V) compounds, [VO(OEt)L] (<b>1</b>) and [Et<sub>3</sub>NH][VO<sub>2</sub>L] (<b>2</b>), were synthesized using an aroylhydrazone Schiff base (5-bromo-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (H<sub>2</sub>L). They were characterized by elemental analysis, Fourier-transform infrared spectroscopy (FT-IR), (<sup>1</sup>H and <sup>51</sup>V) nuclear magnetic resonance (NMR), electrospray ionization mass spectrometry (ESI-MS) and single crystal X-ray diffract  ...[more]

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