Volumetric properties of binary aqueous solutions of protic ionic liquids based on bis (2-hydroxyethyl) ammonium

Dheiver Santos, Éverton Lourenço, Maria F C Santos, Elton Franceschi, Cláudio Dariva, Andersson Barison, André Zuber, Marcelo Castier, Silvana Mattedi

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7 Citations (Scopus)


Densities were determined for binary mixtures containing the protic ionic liquids: bis (2-hydroxyethyl) ammonium acetate, propionate, and butanoate ([BHEA][Ac], [BHEA][Pr], and [BHEA][Bu]) and water at six different temperatures (293.15, 303.15, 313.15, 323.15; 333.15, 343.15 K) and atmospheric pressure. The densities were fitted using the Mattedi-Tavares-Castier equation of state, which correlated the experimental data well. For the system bis (2-hydroxyethyl) ammonium butyrate + water, a maximum in density was observed at intermediate compositions, at each of the measured temperatures. The excess molar volumes were generally negative for the three binary systems studied, except for certain compositions at the highest measured temperatures.

Original languageEnglish
Pages (from-to)867-872
Number of pages6
JournalJournal of Molecular Liquids
Publication statusPublished - 1 Oct 2016



  • Densities
  • Equation of state
  • Mattedi-Tavares-Castier
  • Protic ionic liquids

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

Santos, D., Lourenço, É., Santos, M. F. C., Franceschi, E., Dariva, C., Barison, A., Zuber, A., Castier, M., & Mattedi, S. (2016). Volumetric properties of binary aqueous solutions of protic ionic liquids based on bis (2-hydroxyethyl) ammonium. Journal of Molecular Liquids, 222, 867-872. https://doi.org/10.1016/j.molliq.2016.07.048