Thermophysical properties of 1-alkylpyridinum bis(trifluoromethylsulfonyl)imide ionic liquids

The thermophysical properties of 1-alkylpyridinium bis(trifluoromethylsulfonyl)imide, [Cnpy][Tf2N] ionic
liquids where n = 4, 8, 10, or 12 have been determined. Density q, and dynamic viscosity g, were determined
at T = (293.15 to 353.15) K and refractive index nD, was measured at T = (293.15 to 333.15) K.
Empirical correlations are proposed to represent the present experimental results. The values of the coefficient
of thermal expansion were calculated from the experimental density values. The thermal decomposition
temperature, Td was also determined using thermogravimetric analyzer (TGA) at a heating rate
of (10 and 20) K min1.