title: Thermodynamic and ultrasonic properties of ascorbic Acid in aqueous protic ionic liquid solutions.
abstract: In this work, we report the thermodynamic and ultrasonic properties of ascorbic acid (vitamin C) in water and in presence of newly synthesized ammonium based protic ionic liquid (diethylethanolammonium propionate) as a function of concentration and temperature. Apparent molar volume and apparent molar isentropic compression, which characterize the solvation state of ascorbic acid (AA) in presence of protic ionic liquid (PIL) has been determined from precise density and speed of sound measurements at temperatures (293.15 to 328.15) K with 5 K interval. The strength of molecular interactions prevailing in ternary solutions has been discussed on the basis of infinite dilution partial molar volume and partial molar isentropic compression, corresponding volume of transfer and interaction coefficients. Result has been discussed in terms of solute-solute and solute-solvent interactions occurring between ascorbic acid and PIL in ternary solutions (AA + water + PIL).
authors.affiliation: Department of Chemistry, Indian Institute of Technology Madras, Chennai-600 036, India.
authors.forename: Vickramjeet
authors.initials: V
authors.lastname: Singh
authors.affiliation: Department of Chemistry, Indian Institute of Technology Madras, Chennai-600 036, India.
authors.forename: Gyanendra
authors.initials: G
authors.lastname: Sharma
authors.affiliation: Department of Chemistry, Indian Institute of Technology Madras, Chennai-600 036, India.
authors.forename: Ramesh L
authors.initials: RL
authors.lastname: Gardas
mesh_terms: D064751:Ammonium Compounds; D001205:Ascorbic Acid / Q000737:chemistry*; D052578:Ionic Liquids; D012996:Solutions; D013816:Thermodynamics; D014465:Ultrasonics; D014867:Water
chemical_list: D064751:Ammonium Compounds; D052578:Ionic Liquids; D012996:Solutions; D014867:Water; D001205:Ascorbic Acid