Nature of the interactions in binary mixtures of 1-butyl-3-ethylimidazolium bromide ionic liquid with methanol and ethanol
| Autor: | Slobodan Gadžurić, Sanja Belić, Sanja O. Podunavac-Kuzmanović, Nebojša Zec, Milan Vraneš, Strahinja Z. Kovačević, Ljubica Grbović |
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| Rok vydání: | 2017 |
| Předmět: |
Aqueous solution
Hydrogen bond Analytical chemistry 02 engineering and technology 010402 general chemistry Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Dilution chemistry.chemical_compound 020401 chemical engineering chemistry Bromide Ionic liquid Materials Chemistry Isobaric process Molecule Organic chemistry Methanol 0204 chemical engineering Physical and Theoretical Chemistry Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. 229:212-216 |
| ISSN: | 0167-7322 |
| Popis: | Physicochemical properties and nature of the interactions in methanol and ethanol solutions of 1-butyl-3-ethylimidazolium bromide ionic liquid, [C4C2im]Br, have been investigated experimentally measuring density over the whole composition range at selected temperatures and atmospheric pressure. From the experimental densities, the excess properties and partial molar volumes of the components at infinite dilution were calculated, as well as the excess molar expansibility at infinite dilution and isobaric thermal expansion coefficients. Obtained negative values of excess molar volumes with pronounced minimum at xIL ≈ 0.3 indicate strong ion–alcohol interactions and better packing due to differences in the size and shape of the molecules. Results are compared with those obtained for aqueous solutions of investigated ionic liquid and discussed in terms of hydrogen bond formation. Also, apparent molar volumes for {[C4C2im]Br + alcohol} systems show more pronounced deviations comparing to aqueous solutions of [C4C2im]Br confirming stronger self-association of the water molecules. |
| Databáze: | OpenAIRE |
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