Volumetric and Acoustic Studies of Interactions Between L-Phenylalanine and 1-Hexyl-3-methylimidazolium Bromide in Aqueous Solution

Experimental density (ρ) and ultrasonic velocity (c) for phenylglycine in ( 0.01, 0.03, 0.05 and 0.05) mol.kg−1 aqueous solutions of 1-hexyl-3-methylimidazolium bromide at T = (313.15 and 318.15) K. Collected values for density and ultrasonic velocity were used to compute the apparent molar volumes (V f ), the apparent molar volumes at infinite dilution (), partial molar isentropic compression (K f ,s ) and partial molar isentropic compression at infinite dilution (). Also recorded data of these mixtures were utilized to calculate pair and triplet interaction coefficients. Such thermodynamic characteristics can be used to investigate the solvation behaviour, structure formation, and many sorts of interactions in (phenylglycine + water + 1-hexyl-3-methylimidazolium bromide) ternary solutions.