Abstract Ionic liquids are effectively used for manufacturing of nanoparticles for thermoelectric generators and in the field of hydrogen storage. Development and optimization of these processes require knowledge of the thermodynamic properties of ionic liquids. Thermochemical study of the series of 1-alkyl-3-methylimidazolium iodides is presented in this work. Vapor pressures and vaporization enthalpies have been measured by using quartz-crystal microbalance. Solution enthalpies were measured by using solution calorimetry. Thermodynamics of aqueous solutions, solubility parameters and miscibility of ILs in eleven organic solvents were derived and discussed. The absence of thermal decomposition of [C4C1Im][I] under vaporization conditions has been demonstrated experimentally and theoretically. It has been shown that vaporization enthalpies are linearly dependent on the chain length of the alkyl substituent and linearly dependent on the surface tension. Aqueous-phase enthalpies of formation of alkyl imidazolium cations have been derived with help of solution calorimetry.

中文翻译：

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通过挥发性为溶解性铺平道路：[CnC1Im][I] 型咪唑基离子液体的热力学

摘要 离子液体有效地用于制造用于热电发电机的纳米颗粒和储氢领域。这些过程的开发和优化需要了解离子液体的热力学特性。本工作介绍了 1-烷基-3-甲基咪唑鎓碘化物系列的热化学研究。蒸气压和蒸发焓已通过使用石英晶体微量天平测量。使用溶液量热法测量溶液焓。导出并讨论了水溶液的热力学、溶解度参数和离子液体在 11 种有机溶剂中的混溶性。[C4ClIm][I] 在汽化条件下不存在热分解已通过实验和理论证明。已经表明，汽化焓与烷基取代基的链长呈线性相关，与表面张力呈线性相关。烷基咪唑鎓阳离子的水相形成焓已经在溶液量热法的帮助下推导出来。