Synthesis and temperature dependence of physical properties of four pyridinium-based ionic liquids: Influence of the size of the cation |
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| Authors: | Elena Gómez Noelia Calvar Ángeles Domínguez Eugénia A. Macedo |
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| Affiliation: | 1. Laboratory of Separation and Reaction Engineering, Departamento de Engenharia Quimica, Facultade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;2. Departamento de Ingeniería Química de la Universidad de Vigo, 36310 Vigo, Spain |
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| Abstract: | In this paper, the ionic liquids 1,2-diethylpyridinium ethylsulfate, EEpyESO4; 1-methylpyridinium methylsulfate, MpyMSO4; 1,3-dimethylpyridinium methylsulfate, MMpyMSO4; and 2-ethyl-1-methylpyridinium methylsulfate, EMpyMSO4; were synthesized in our laboratory, and their experimental densities, speeds of sound, dynamic viscosities, and refractive indices were studied as a function of temperature at atmospheric pressure. Thermal expansion coefficient, molar volume, and molar refraction of these ionic liquids were calculated from the experimental density and refractive index values. |
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