Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Densities, limiting molar conductivities ( (C)0), and Walden products ( (C)0 A) for 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4])-sucrose-water solutions were determined at 298.15 K. The measured densities were used to calculate the apparent molar volumes of sucrose (V ^3,S) and [Bmim][BF4] (V ^3,IL) in the studied solutions. Infinite dilution apparent molar volumes, V ^3,S and V ^3,IL , have been evaluated, together with the standard transfer volumes of the sucrose ( centstVS ) from water to aqueous solutions of [Bmim][BF4] and those of [Bmim][BF4] ( centstVIL ) from water to aqueous sucrose solution. It was shown that the centstVS and centstVIL values are positive and increase with increasing molalities of [Bmim][BF4] and sucrose, respectively. The volumetric interaction parameters for [Bmim][BF4]-sucrose pairs in water were also obtained and interpreted by the structural interactions model. Additionally, the (C)0 values for [Bmim][BF4] decrease with the molality of sucrose (mS), as well as Walden products ( (C)0 A), due to the preferential solvation of ions by sucrose molecules.