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Issue 31, 2010
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Vaporisation of an ionic liquid near room temperature

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Abstract

The temperature at which the vapour phase of the ionic liquids (ILs) 1-ethyl-3-methylimidazolium bis[(trifluoromethane)sulfonyl]imide, [C2C1Im][Tf2N], and 1-ethyl-3-methylimidazolium ethylsulfate, [C2C1Im][EtOSO3], can be detected was investigated using line-of-sight mass spectrometry (LOSMS). By optimising the detection system used in previous experiments, the lowest temperature for which vapour was detected for [C2C1Im][Tf2N] was ∼340 K, whereas for [C2C1Im][EtOSO3] it was ∼390 K. Initial investigations also show that the temperature at which measurements are made affects the enthalpy of vaporisation at 298 K, ΔvapH298. The reasons for these differences in ΔvapH298 with respect to temperature are discussed. The vapour pressure of both ILs is estimated at far lower temperatures than previously achieved and extrapolations to room temperature are given.

Graphical abstract: Vaporisation of an ionic liquid near room temperature

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Publication details

The article was received on 12 Mar 2010, accepted on 19 May 2010 and first published on 09 Jun 2010


Article type: Paper
DOI: 10.1039/C004197A
Citation: Phys. Chem. Chem. Phys., 2010,12, 8893-8901
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    Vaporisation of an ionic liquid near room temperature

    K. R. J. Lovelock, A. Deyko, P. Licence and R. G. Jones, Phys. Chem. Chem. Phys., 2010, 12, 8893
    DOI: 10.1039/C004197A

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