Thermodynamic and ultrasonic properties of ascorbic Acid in aqueous protic ionic liquid solutions

PLoS One. 2015 May 26;10(5):e0126091. doi: 10.1371/journal.pone.0126091. eCollection 2015.

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).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Ammonium Compounds
  • Ascorbic Acid / chemistry*
  • Ionic Liquids
  • Solutions
  • Thermodynamics
  • Ultrasonics
  • Water

Substances

  • Ammonium Compounds
  • Ionic Liquids
  • Solutions
  • Water
  • Ascorbic Acid

Grants and funding

The authors are thankful to Council of Scientific and Industrial Research (CSIR, http://www.csirhrdg.res.in/), India for the financial support through grant numbers 01(2525)/11/EMR-II. Dr. Vickramjeet Singh acknowledges the financial support from CSIR through his post-doctoral fellowship. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.