Thermophysical characterization of 1-ethylpyridinium triflate and comparison with similar ionic liquids

Research paper by María García-Andreu, Miguel Castro, Ignacio Gascón, Carlos Lafuente

Indexed on: 05 Oct '16Published on: 02 Sep '16Published in: The Journal of Chemical Thermodynamics


We present here a comprehensive thermophysical study of the piridynium-based ionic liquid: 1-ethylpyridinium triflate. Density, speed of sound, refractive index, surface tension, isobaric molar heat capacity, kinematic viscosity and electrical conductivity have been determined in the temperature range (293.15–338.15 K) and at pressure of 0.1 MPa, density was also measured in the pressure range (0.1–40 MPa) at T = 303.15 K. From these values, some derived properties have been calculated. In addition the thermal behaviour around the melting point has been registered. All these properties have been discussed and compared with those of two similar ionic liquids, 1-ethylpyridinium bis(trifluoromethylsulfonyl)imide and 1-butylpyridinium triflate.

Graphical abstract 10.1016/j.jct.2016.08.038.jpg
Figure 10.1016/j.jct.2016.08.038.0.jpg
Figure 10.1016/j.jct.2016.08.038.1.jpg
Figure 10.1016/j.jct.2016.08.038.2.jpg
Figure 10.1016/j.jct.2016.08.038.3.jpg
Figure 10.1016/j.jct.2016.08.038.4.jpg
Figure 10.1016/j.jct.2016.08.038.5.jpg
Figure 10.1016/j.jct.2016.08.038.6.jpg
Figure 10.1016/j.jct.2016.08.038.7.jpg