TY - JOUR
T1 - Oxidovanadium(V) complexes anchored on carbon materials as catalysts for the oxidation of 1-phenylethanol
AU - Sutradhar, M.
AU - Martins, L.M.D.R.S.
AU - Carabineiro, SAC
AU - Guedes da Silva, M.F.C.
AU - Buijnsters, J.G.
AU - Figueiredo, JL
AU - Pombeiro, A.J.L.
PY - 2016
Y1 - 2016
N2 - Six oxidovanadium(V) aroylhydrazone complexes derived from (3,5-di-tert-butyl-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (H2L1) and (3,5-di-tert-butyl-2-hydroxybenzylidene)-2-aminobenzohydrazide (H2L2), namely, [VOL1(OEt)][VOL1(OEt) (EtOH)] (1), [VOL2(OEt)] (2), [Et3NH][VO2L1] (3), [VO2(HL2)]⋅2 EtOH (4), [(VOL1)2(μ-O)] (5), and [(VOL2)2(μ-O)] (6), were synthesized and characterized by elemental analysis, IR, 1H NMR, and 51V NMR spectroscopies, ESI-MS and, for 1–5, single-crystal XRD. The compounds have VO3+ (1 and 2), VO2+ (3 and 4), and V2O34+ (5 and 6) cores. They are active homogeneous catalysts in the microwave-assisted, solvent-free peroxidative oxidation of 1-phenylethanol to acetophenone by tBuOOH. The immobilization of the oxidovanadium complexes (1, 2, 4, and 5) on oxidized carbon materials improved the oxidation efficiency and allowed catalyst reuse with the preservation of activity.
AB - Six oxidovanadium(V) aroylhydrazone complexes derived from (3,5-di-tert-butyl-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (H2L1) and (3,5-di-tert-butyl-2-hydroxybenzylidene)-2-aminobenzohydrazide (H2L2), namely, [VOL1(OEt)][VOL1(OEt) (EtOH)] (1), [VOL2(OEt)] (2), [Et3NH][VO2L1] (3), [VO2(HL2)]⋅2 EtOH (4), [(VOL1)2(μ-O)] (5), and [(VOL2)2(μ-O)] (6), were synthesized and characterized by elemental analysis, IR, 1H NMR, and 51V NMR spectroscopies, ESI-MS and, for 1–5, single-crystal XRD. The compounds have VO3+ (1 and 2), VO2+ (3 and 4), and V2O34+ (5 and 6) cores. They are active homogeneous catalysts in the microwave-assisted, solvent-free peroxidative oxidation of 1-phenylethanol to acetophenone by tBuOOH. The immobilization of the oxidovanadium complexes (1, 2, 4, and 5) on oxidized carbon materials improved the oxidation efficiency and allowed catalyst reuse with the preservation of activity.
U2 - 10.1002/cctc.201600316
DO - 10.1002/cctc.201600316
M3 - Article
SN - 1867-3880
VL - 8
SP - 2254
EP - 2266
JO - ChemCatChem
JF - ChemCatChem
IS - 13
ER -