Thermophysical properties of pure and water-saturated tetradecyltrihexylphosphonium-based ionic liquids
authors Neves, CMSS; Carvalho, PJ; Freire, MG; Coutinho, JAP
nationality International
journal JOURNAL OF CHEMICAL THERMODYNAMICS
author keywords Solubility; Density; Viscosity; Ionic liquids; Water; Tetradecyltrihexylphosphonium; Bromide; Chloride; Bis(trifluoromethylsulfonyl)imide; Decanoate; Methanesulfonate; Dicyanamide; Bis(2,4,4-trimethylpentyl)phosphinate
keywords HIGH-PRESSURE DENSITIES; PHYSICAL-PROPERTIES; MUTUAL SOLUBILITIES; CHEMICAL-INDUSTRY; SURFACE TENSIONS; CARBON-DIOXIDE; PHOSPHONIUM; TEMPERATURE; IMIDAZOLIUM; AMMONIUM
abstract In this work, the solubility of water in several tetradecyltrihexylphosphonium-based ionic liquids at 298.15 K. and densities and viscosities of both pure and water-saturated ionic liquids in a broad temperature range were measured. The selected ionic liquids comprise the common tetradecyltrihexylphosphonium cation combined with the following anions: bromide, chloride, bis(trifluoromethylsulfonyl)imide, decanoate, methanesulfonate, dicyanamide and bis(2,4,4-trimethylpentyl)phosphinate. The isobaric thermal expansion coefficients for pure and water-saturated ionic liquids were determined based on the density dependence with temperature. Taking into account that the excess molar volumes of the current hydrophobic water-saturated ionic liquids are negligible, the solubility of water was additionally estimated from the gathered density data and compared with the experimental solubilities obtained. Moreover, the experimental densities were compared with those predicted by the Gardas and Coutinho model while viscosity data were correlated using the Vogel-Tammann-Fulcher method. (c) 2011 Elsevier Ltd. All rights reserved.
publisher ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
issn 0021-9614
year published 2011
volume 43
issue 6
beginning page 948
ending page 957
digital object identifier (doi) 10.1016/j.jct.2011.01.016
web of science category Thermodynamics; Chemistry, Physical
subject category Thermodynamics; Chemistry
unique article identifier WOS:000289600400016
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