Document Type : Regular Article
Physical Chemistry Department, University of Tabriz, Tabriz, Iran
Department of Physical Chemistry, University of Tabriz, Tabriz, Iran
The present work reported density, viscosity, speed of sound, electrical conductivity and refractive index data of L-alanine in the aqueous solutions of 1-hexyl-3-methylimidazolium ibuprofenate at T= 298.15 K. Using the measured data, partial molar volume of transfer ( ), partial molar isentropic compressibility of transfer ( ), viscosity B-coefficient of transfer (∆traB), ion association constant (KA) and molar refraction (RD) quantities were calculated. The obtained parameters provide the information about the solvation properties of aqueous solutions of L-alanine in the presence of [HMIm][Ibu]. The positive values of , and ∆traB are indicative of the ion-polar and polar-polar interactions between [HMIm][Ibu] and L-alanine. In addition, decreeing the KA values with addition of L-alanine to the [HMIm][Ibu] solutions suggests that the ion pair formation don’t proceed spontaneously at higher concentration of amino acid.