Department of Physical Chemistry, University of Rostock, Albert-Einstein-Str. 27, 18059 Rostock, Germany.
Department of Physical Chemistry, Kazan Federal University, 420008 Kazan, Russia.
Molecules. 2023 Jan 5;28(2):539. doi: 10.3390/molecules28020539.
In this study, we determined the enthalpies of vaporisation for a suitable set of molecular and ionic liquids using modern techniques for vapour pressure measurements, such as the quartz crystal microbalance, thermogravimetric analysis (TGA), and gas chromatographic methods. This enabled us to measure reasonable vapour pressures, avoiding the problem of the decomposition of the ionic liquids at high temperatures. The enthalpies of vaporisation could be further analysed by applying the well-known "group contribution" methods for molecular liquids and the "centerpiece" method for ionic liquids. This combined approach allowed for the dissection of the enthalpies of vaporisation into different types of molecular interaction, including hydrogen bonding and the dispersion interaction in the liquid phase, without knowing the existing species in both the liquid and gas phases.
在这项研究中，我们使用现代蒸气压测量技术，如石英晶体微天平、热重分析（TGA）和气相色谱法，确定了一组合适的分子和离子液体的汽化焓。这使我们能够测量合理的蒸气压，避免了离子液体在高温下分解的问题。通过应用著名的分子液体“基团贡献”方法和离子液体的“中件”方法，可以进一步分析汽化焓。这种组合方法允许将汽化焓分解为不同类型的分子相互作用，包括氢键和液相中的色散相互作用，而无需了解液相和气相中存在的物种。
