Volumetric Properties of 1-Butyl-3-methylimidazolium Tetrafluoroborate–Glucose–Water Systems

Abstract

Densities for 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4)–glucose–water solutions were determined at 298.15 K. The measured densities were used to calculate the apparent molar volumes of glucose (VΦ,S) and [Bmim]BF4 (VΦ,IL) in the studied solutions. Infinite dilution apparent molar volumes, VΦ,S∞ and VΦ,IL∞, have been evaluated, together with the standard transfer volumes of the sucrose (ΔtVS∞) from water to aqueous solutions of [Bmim]BF4 and those of [Bmim]BF4 (ΔtVIL∞) from water to aqueous glucose solution. It was shown that the ΔtVS∞ and ΔtVIL∞ values are positive and increase with increasing molalities of [Bmim]BF4 and glucose, respectively, and the values of VΦ,S∞ have the order of glucose < sucrose. The volumetric interaction parameters for [Bmim]BF4–glucose pairs in water were also obtained and interpreted by the structural interactions model.