High-pressure volumetric properties of imidazolium-based ionic liquids: Effect of the anion

J. Jacquemin, P. Husson, V. Mayer, I. Cibulka

Research output: Contribution to journalArticle

209 Citations (Scopus)

Abstract

The densities of five imidazolium-based ionic liquids (ILs) (1-butyl-3-methylimidazolium tetrafluoroborate, [CiC4-Im][BF 4]; 1-butyl-3-methylimidazolium hexafluorophosphate, [CiC 4Im][PF6]; 1-butyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}imide, [C1C4Im][Tf 2N]; 1-ethyl-3-methylimidazoliumbis{(trifluoromethyl)sulfonyl}-imide, [C1C2Im][Tf2N]; l-ethyl-3-methylimidazolium ethylsulfate, [C1C2Im][EtSO4]) were measured as a function of temperature from (293 to 415) K and over an extended pressure range from (0.1 to 40) MPa using a vibratingtube densimeter. Knowledge of the variation of the density with temperature and pressure allows access to the mechanical coefficients: thermal expansion coefficient and isothermal compressibility. The effects of the anion and of the length of the alkyl chain on the imidazolium ring on the volumetric properties were particularly examined. The mechanical coefficients were compared with those of common organic solvents, water and liquid NaCl. Finally, a prediction model, based on an "ideal" volumetric behavior of the ILs, is proposed to allow calculation of the molar volume of imidazolium-based ionic liquids as a function of temperature. ©2007 American Chemical Society.
Original languageEnglish
Pages (from-to)2204-2211
Number of pages8
JournalJournal of Chemical and Engineering Data
Volume52
Issue number6
Publication statusPublished - Nov 2007

Bibliographical note

Cited By (since 1996): 77

Export Date: 6 September 2012

Source: Scopus

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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