Study of interactions between L-alanine and 1-octyl-3-methylimidazolium salicylate or 1-octyl-3-methylimidazolium ibuprofenate using the thermophysical properties at T=298.15 K

摘要

The effect of 1-octyl-3-methylimidazolium salicylate, [OMIm][Sal] and 1-octyl-3-methylimidazolium ibuprofenate, [OMIm][Ibu] as active pharmaceutical ingredient ionic liquids (API-ILs) on the solvation properties of L-alanine in aqueous media have been investigated by thermophysical properties determination. The partial molar volume of transfer (Delta V-tra(phi)0), partial molar isentropic compressibility of transfer (Delta(tra)kappa(0)(phi)), viscosity B-coefficient of transfer (Delta B-tra), ion association constant (K-A) and molar refraction (R-D) quantities have been calculated using the measured density, speed of sound, viscosity, electrical conductance and refractive index data, The results showed that the ion-polar and polar-polar interactions between API-ILs and L-alanine are dominant. (C) 2019 Elsevier B.V. All rights reserved.