Volumetric and compressibility studies of monosaccharides in aqueous cholinium propanoate [Chl][Pro] solutions at different temperatures

In this study, the solvation behaviour of monosaccharide's in aqueous solutions of newly synthesized ionic liquid: cholinium propanoate [Chl][Pro] has been studied at various temperatures and concentrations. The volumetric properties of two monosaccharides (viz. D (+)glucose and D (+)-xylose) were evaluated from density and speed of sound data. Apparent molar volume, V2,φ and apparent molar isentropic compressibility, Ks,2,φ calculated from experimental data were used to evaluate respective infinite dilution values (X2º = V2º or Kºs,2). The volumetric transfer volumes (ΔtV2º or ΔtKºs,2) were also evaluated to analyze the solute-co-solute interactions. The ΔtV2º and ΔtKºs,2 values reveal that the interaction between ionic liquid and monosaccharides increases with concentration and temperature. The positive transfer parameter reveals hydrophilic-ionic interactions as evaluated from structural interaction model.