TY - JOUR
T1 - Toluene Oxidation by Hydrogen Peroxide in Deep Eutectic Solvents
AU - Guajardo, Nadia
AU - Carlesi, Carlos
AU - Aracena, Álvaro
N1 - Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - The catalytic effect of several deep eutectic solvents (DESs) on biphasic toluene oxidation by hydrogen peroxide to produce benzaldehyde was studied under various operational conditions. Experiments were performed with sodium tungstate, iron(III) chloride, phosphotungstic acid, and phosphomolybdic acid as catalysts dissolved in three DESs composed of choline chloride and a hydrogen-bond donor molecule such as urea, glycerol, or ethylene glycol. Additionally, a fourth catalytic system composed of iron(III) chloride and choline chloride was tested. The best result was achieved with FeCl3 dissolved in the DES containing ethylene glycol, which gave 37.9% conversion and 63.6% selectivity. The results are better than those reported for other ionic liquids; this may be due to similar activation of hydrogen peroxide by polarization of the peroxide bond through hydrogen bonding and the low viscosity of the solvent.
AB - The catalytic effect of several deep eutectic solvents (DESs) on biphasic toluene oxidation by hydrogen peroxide to produce benzaldehyde was studied under various operational conditions. Experiments were performed with sodium tungstate, iron(III) chloride, phosphotungstic acid, and phosphomolybdic acid as catalysts dissolved in three DESs composed of choline chloride and a hydrogen-bond donor molecule such as urea, glycerol, or ethylene glycol. Additionally, a fourth catalytic system composed of iron(III) chloride and choline chloride was tested. The best result was achieved with FeCl3 dissolved in the DES containing ethylene glycol, which gave 37.9% conversion and 63.6% selectivity. The results are better than those reported for other ionic liquids; this may be due to similar activation of hydrogen peroxide by polarization of the peroxide bond through hydrogen bonding and the low viscosity of the solvent.
KW - deep eutectic solvents
KW - hydrogen bonds
KW - iron
KW - oxidation
KW - peroxides
UR - http://www.scopus.com/inward/record.url?scp=84939254328&partnerID=8YFLogxK
U2 - 10.1002/cctc.201500604
DO - 10.1002/cctc.201500604
M3 - Article
AN - SCOPUS:84939254328
VL - 7
SP - 2451
EP - 2454
JO - ChemCatChem
JF - ChemCatChem
SN - 1867-3880
IS - 16
ER -