Vaporisation of an ionic liquid near room temperature

文献情報

出版日 2010-06-09

DOI 10.1039/C004197A

インパクトファクター 3.676

著者

Kevin R. J. Lovelock, Alexey Deyko, Peter Licence, Robert G. Jones

原文を見る

要旨

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.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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