Reinado Christian, Pelegrina Adrián, Sánchez-Rubio Miguel, Artigas Héctor, Lafuente Carlos
Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Zaragoza, Spain.
J Chem Eng Data. 2022 Feb 10;67(3):636-643. doi: 10.1021/acs.jced.1c00925. eCollection 2022 Mar 10.
The thermophysical properties of three pyridinium-based ionic liquids sharing ions were measured at several temperatures (278.15-338.15) K and at atmospheric pressure (0.1 MPa). Three ionic liquids were studied: 1-butylpyridinium bis(trifluoromethyl-sulfonyl)imide, 1-hexylpyridinium bis(trifluoromethylsulfonyl)imide, and 1-hexylpyridinium tetrafluoroborate. The following thermophysical properties were measured: density, speed of sound, refractive index, surface tension, isobaric molar heat capacity, kinematic viscosity, and electrical conductivity. The thermophysical properties at atmospheric pressure were correlated with temperature, noting that the starting temperature for the speed of sound measurements depended on the ionic liquid. From these experimental results, some derived properties (isentropic compressibility, molar refraction, and dynamic viscosity) are calculated. These results together with those published previously for 1-butylpyridinium tetrafluoroborate are discussed.
在几个温度（278.15 - 338.15）K和大气压（0.1 MPa）下测量了三种共享离子的吡啶基离子液体的热物理性质。研究了三种离子液体：1 - 丁基吡啶双（三氟甲基磺酰）亚胺、1 - 己基吡啶双（三氟甲基磺酰）亚胺和1 - 己基吡啶四氟硼酸盐。测量了以下热物理性质：密度、声速、折射率、表面张力、等压摩尔热容、运动粘度和电导率。将大气压下的热物理性质与温度进行了关联，注意到声速测量的起始温度取决于离子液体。根据这些实验结果，计算了一些导出性质（等熵压缩性、摩尔折射和动力粘度）。讨论了这些结果以及先前发表的关于1 - 丁基吡啶四氟硼酸盐的结果。
