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Physicochemical properties of hydrophobic hexafluoroantimonate ionic liquids and applications of the mole surface Gibbs free energy

Ionics, ISSN: 1862-0760, Vol: 26, Issue: 11, Page: 5585-5595
2020
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Series of hydrophobic hexafluoroantimonate [Ceim][SbF] (n = 4, 5, 6) were synthesized and characterized by H NMR and ESI-MS. It is obvious that the reactive hydrogen is replaced with ethyl group on N-3 position of imidazole cation, and it could have an effect on the corresponding physicochemical properties. The density, surface tension, refractive index, and conductivity of the hydrophobic ILs [Ceim][SbF] (n = 4, 5, 6) were measured in the temperature range of (293.15 to 343.15) ± 0.05 K with an interval of 5 K. The volume properties and surface properties were calculated. According to Kabo’s method, the vaporization enthalpy was also calculated, and the polarities were predicted. The applications of the mole surface Gibbs free energy were investigated. In addition, the relationship between the conductivity and temperature was also explored, and the molar conductivity and diffusion coefficient for ILs were obtained.

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