Molecular interactions of 1-butyl-2,3-dimethylimidazolium chloride ionic liquid in aqueous L-alanine solutions through volumetric and compressibility approaches

Abstract

The interactions of 1-Butyl-2,3-dimethylimidazolium chloride ionic liquid i.e. [BMMIm][Cl] with l-alanine as a function of temperature and concentration have been inspected. The density and speed of sound values for the [BMMIm][Cl] in different concentrations (0.05 mol·kg^-1 and 0.10 mol·kg^-1) of aqueous l-alanine solutions within the concentration range of 0.01 to 0.13 mol·kg^-1 at T = (288.15, 293.15, 298.15, 303.15, 308.15, 313.15 and 318.15) K and atmospheric pressure have been measured. The apparent molar volume of solute, limiting apparent molar volume of solute, and transfer limiting apparent molar volume of solute for [BMMIm][Cl] in aqueous l-alanine solutions have been calculated using density data. The apparent molar isentropic compression of solute, limiting apparent molar isentropic compression of solute, and transfer limiting apparent molar isentropic compression of solute have been assessed utilizing speed of sound data. The expansivity parameter and its derivative with respect to temperature, and the pair and triplet interaction coefficients were evaluated. The findings of the study have been analyzed in terms of solute-solute and solute-solvent interactions in ternary systems.