Abstract
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 (ΔtraVϕ0), partial molar isentropic compressibility of transfer (Δtraκϕ0), viscosity B-coefficient of transfer (∆traB), ion association constant (KA) and molar refraction (RD) 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.
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