Departamento de Química Orgánica-Química Física, Facultad de Ciencias, Universidad de Zaragoza, Zaragoza, Spain.
J Phys Chem B. 2010 Mar 18;114(10):3601-7. doi: 10.1021/jp9120707.
The thermophysical properties of two pyridinium-based ionic liquids, 1-butylpyridinium tetrafluoroborate and 1-butylpyridinium triflate, have been measured. Thus, densities, refractive indices, speeds of sound, viscosities, surface tensions, isobaric molar heat capacities, and thermal properties have been experimentally determined over a wide range of temperatures. The comparison of the properties of the two ionic liquids has allowed us to analyze in detail the anion influence. Moreover, useful derived properties have been calculated from the results. On the other hand, the influence of the lack of a substituent in the cation has been evaluated when properties of 1-butylpyridinium tetrafluoroborate have been contrasted to those of 1-butyl-n-methylpyridinium tetrafluoroborate, (n = 2, 3, or 4). The study has been carried out paying special attention to interactions between ions in order to elucidate the desired relationship between properties and structural characteristics of ionic liquids.
已经测量了两种基于吡啶鎓的离子液体，即 1-丁基吡啶四氟硼酸盐和 1-丁基吡啶三氟甲磺酸盐的热物理性质。因此，在很宽的温度范围内实验确定了密度、折射率、声速、粘度、表面张力、等压摩尔热容和热性质。两种离子液体性质的比较允许我们详细分析阴离子的影响。此外，还从结果中计算了有用的衍生性质。另一方面，当将 1-丁基吡啶四氟硼酸盐的性质与 1-丁基-n-甲基吡啶四氟硼酸盐（n = 2、3 或 4）的性质进行对比时，评估了阳离子中缺少取代基的影响。这项研究特别关注离子之间的相互作用，以阐明离子液体性质和结构特征之间的预期关系。
