Activity Coefficients at Infinite Dilution of Polar Solutes in 1-Butyl-3-methylimidazolium Trifluoromethanesulfonate Using Gas–Liquid Chromatography

• Published in: Journal of chemical and engineering data Vol. 53; no. 3; pp. 846 - 849
• Main Authors: Ge, Ming-Lan, Wang, Li-Sheng
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.03.2008
• Subjects: Analytical chemistry; Chemical thermodynamics; Chemistry; Chromatographic methods and physical methods associated with chromatography; Exact sciences and technology; Gas chromatographic methods; General and physical chemistry; General. Theory; Organic solvent; Dioxane; Nitrile; Infinite dilution; Chlorine Organic compounds; Activity coefficient; Alcohol; Gas liquid chromatography; Polar compound; Ketone; Ionic liquid
• ISSN: 0021-9568; 1520-5134
• DOI: 10.1021/je700560s

Activity coefficients at infinite dilution γ i ∞ have been measured for 17 polar solutes (linear and branched C1 to C5 alcohols, acetonitrile, acetone, 1,4-dioxane, tetrahydrofuran, ethyl acetate, and chloromethanes) in the ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([BMIM][CF3SO3]) by the gas–liquid chromatographic method with the ionic liquid as the stationary phase. The measurements were carried out in the temperature range of (303.15 to 363.15) K. The partial molar excess enthalpies at infinite dilution H i E,∞ of the solutes in the ionic liquid were also derived from the temperature dependence of the γ i ∞ values.