Abstract

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 (293.15–338.15K) and at pressure of 0.1MPa, density was also measured in the pressure range (0.1–40MPa) at T=303.15K. 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.

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