| Publication Type |
Journal Article |
| Title |
Volumetric and sound speed study of ammonium-based ionic liquid mixtures with ethanol |
| Authors |
A.F. Santos M. L. C. J. Moita Joao F. C. C. Silva Isabel M. S. Lampreia |
| Groups |
MTFT MET |
| Journal |
JOURNAL OF CHEMICAL THERMODYNAMICS |
| Year |
2017 |
| Month |
January |
| Volume |
104 |
| Number |
|
| Pages |
118-127 |
| Abstract |
Thermodynamic studies embracing molecular interactions between ionic liquids (ILs) and molecular solvents are scarce and are required to explore molecular interactions and structural effects with interest in engineering applications. Ammonium-based are interesting ILs since they can be tailored to provide information concerning both chain length and solvophobic/solvophilic effects. In this work from accurately measured density and sound speed data in the systems ethanol + \[N-4111]; [N-4441] or [choline]\ [NTf2] derived quantities such as excess partial molar volumes and isentropic compressions including their limiting values were obtained. The reasoning of the results permitted to conclude that while in the [N-4441][NTf2] case packing effects due to the difference in size of the components prevail, in the other two cases specific interaction ethanol-cation explains both the lower minimums in the excess properties and the higher magnitude of the negative limiting excess partial molar, volumes and isentropic compression values in the mixture containing [N-4111][NTf2] in relation to [N-4441][NTf2] and the negative limiting partial molar isentropic compression in the [choline][NTf2] case in contrast with positive values for the other two ILs. (C) 2016 Elsevier Ltd. |
| DOI |
http://dx.doi.org/10.1016/j.jct.2016.09.024 |
| ISBN |
|
| Publisher |
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
| Book Title |
|
| ISSN |
0021-9614 |
| EISSN |
1096-3626 |
| Conference Name |
|
| Bibtex ID |
ISI:000387986900015 |
| Observations |
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