Synthesis and characterization of metal-substituted tetraalkylphosphonium polyoxornetalate ionic liquids
authors Santos, FM; Magina, SP; Nogueira, HIS; Cavaleiro, AMV
nationality International
journal NEW JOURNAL OF CHEMISTRY
keywords KEGGIN-TYPE POLYOXOTUNGSTATES; INORGANIC HYBRID MATERIALS; HYDROGEN-PEROXIDE; ELECTROCHEMICAL PROPERTIES; 12-TUNGSTOPHOSPHORIC ACID; ELECTROCATALYTIC ACTIVITY; 12-PHOSPHOTUNGSTIC ACID; SELECTIVE OXIDATION; H2O2 REDUCTION; WELLS-DAWSON
abstract Compounds with trihexyl(tetradecyl)phosphonium (THTP) cations and first row transition metal-substituted Keggin polyoxoanions were synthesised, having the general formula (THTP)(m)[PW11O39M(H2O)] with M = Fe, Co, Mn and m = anion charge. All compounds were characterized by spectroscopic and analytical techniques. These studies indicated that both the polyoxometalates and the cations are present in the new compounds without major alterations. All compounds are coloured liquids at room temperature and are stable up to ca. 300 degrees C. Studies conducted at low temperatures point to a solidification process at about -25 degrees C for the Fe and Co materials. Electrochemical measurements were performed for (THTP)(4)[PW11O39Fe(H2O)] on a functionalized glassy carbon electrode. This work was complemented by the preparation and characterization of compounds with the anions [PW11O39](7-) and [P2W20O70(H2O)(2)](10-), which were also liquids at room temperature.
publisher ROYAL SOC CHEMISTRY
issn 1144-0546
year published 2016
volume 40
issue 2
beginning page 945
ending page 953
digital object identifier (doi) 10.1039/c5nj01093d
web of science category Chemistry, Multidisciplinary
subject category Chemistry
unique article identifier WOS:000371559000011
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