Structure-property relationships in ILs： A study of the alkyl chain length dependence in vaporisation enthalpies of pyridinium based ionic liquids

The enthalpies of vaporization for the series of pyridinium-based ionic liquids with bis（trifluoromethylsulfonyl）imide anion [CnPy][NTfz] （n = 2, 3, 4, 5, and 6） have been determined with the quartz crystal microbalance technique combined with the Langmuir evaporation. The linear dependence of vapor...

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Bibliographic Details
Published in:Science China. Chemistry 2012-08, Vol.55 (8), p.1525-1531
Main Authors: Zaitsau, Dzmitry H., Yermalayeu, Andrei V., Emel’yanenko, Vladimir N., Verevkin, Sergey P., Welz-Biermann, Urs, Schubert, Thomas
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Enthalpy
Ionic liquids
Liquid phases
Quartz crystals
Surface tension
Vaporization
吡啶类
性能
烷基链
石英晶体微天平
离子液体
结构
蒸发焓
长度
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Summary:The enthalpies of vaporization for the series of pyridinium-based ionic liquids with bis（trifluoromethylsulfonyl）imide anion [CnPy][NTfz] （n = 2, 3, 4, 5, and 6） have been determined with the quartz crystal microbalance technique combined with the Langmuir evaporation. The linear dependence of vaporization enthalpies on the chain length has been revealed. New approach based on volumetric, surface tension, and speed of sound measurements has been developed for estimation of heat capacity differences between gas and liquid phase, which were required for adjustment of measured vaporization enthalpies to the ref- erence temperature 298 K.
ISSN:1674-7291
1869-1870
DOI:10.1007/s11426-012-4662-2