Liquid densities, heat capacities, refractive index and excess quantities for {protic ionic liquids plus water} binary system

Meriem Anouti*, Magaly Caillon-Caravanier, Yosra Dridi, Johan Jacquemin, Christopher Hardacre, Daniel Lemordant

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)

Abstract

Densities, rho, of aqueous solutions of the room temperature protic ionic liquid (PIL), pyrrolidinium nitrate are determined at the atmospheric pressure over the temperature range from (283.15 to 323.15) K and within the whole composition range. The molar isobaric heat capacities, C(p), and refractive index, n(D), of {PIL + water} binary system are measured at 298.15 K. The excess molar volumes V(E), excess molar isobaric heat capacities C(p)(E), and deviation from ideality of refractive index Delta(phi)n, of pyrrolidinium nitrate aqueous solutions were deduced from the experimental results as well as apparent molar volumes V(phi), partial molar volumes (V) over bar (m,i), and thermal expansion coefficients alpha(p). The V(E) values were found to be positive over the entire composition range at all temperatures studied therein, whereas deviations from ideality were negative for refractive index Delta(phi)n. The volumetric properties of binary mixtures containing water and four other protic ionic liquids, such as pyrrolidinium hydrogen sulfate, pyrrolidinium formiate, collidinium formate, and diisopropyl-ethylammonium formate were also determined at 298.15 K. Results have been then discussed in terms of molecular interactions and molecular structures in these binary mixtures. (C) 2009 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)799-808
Number of pages10
JournalThe Journal of Chemical Thermodynamics
Volume41
Issue number6
DOIs
Publication statusPublished - Jun 2009

Keywords

  • AQUEOUS-SOLUTIONS
  • CATALYSIS
  • Density
  • PREDICTION
  • Protic ionic liquids
  • Water
  • THERMODYNAMIC ANALYSIS
  • PART I
  • MIXTURES
  • Excess properties
  • GREEN SOLVENTS
  • PHYSICAL-PROPERTIES
  • VOLUMETRIC PROPERTIES
  • Isobaric heat capacity
  • Refractive index
  • TEMPERATURE

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