Thermodynamic Properties of 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide

摘要

Measurements of the heat capacity and the enthalpy changes of transitions of 1- hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide were requested as part of a project initiated by the International Union of Pure and Applied Chemistry (IUPAC). The measurements were performed with differential scanning calorimetry from 150 K to 345 K. These measurements led to the heat capacity of the crystal phases; the enthalpy change for transition between two crystal phases; the heat capacity of a glass, the supercooled liquid, and the stable liquid; the fusion temperatures of two crystal phases; and the enthalpy change for fusion of the stable crystal phase. Measurements at higher temperatures also probed thermal stability of the material. The calibration of the differential scanning calorimeter is described in detail.