Surface Tension of Tricyanomethanide- and Tetracyanoborate-Based lmidazolium Ionic Liquids by Using the Pendant Drop Method

Journal article
(Original article)


Publication Details

Author(s): Koller TM, Rausch MH, Pohako-Esko K, Wasserscheid P, Fröba AP
Journal: Journal of Chemical and Engineering Data
Publisher: American Chemical Society
Publication year: 2015
Volume: 60
Pages range: 2665-2673
ISSN: 0021-9568


Abstract


The surface tension of nine tricyanomethanide ([C(CN)(3)](-))- and tetracyanoborate ([B(CN)(4)](-))-based ionic liquids (ILs) carrying a homologous series of the 1-alkyl-3-methylimidazolium ([alkyl-MIM](+)) cations [EMLM](+) (ethyl), [BMIM](+) (butyl), [HMIM](+) (hexyl), [OMIM](+) (octyl), and [DMIM](+) (decyl) was measured with the pendant drop method in the temperature range between (283 and 353) K at atmospheric pressure with an estimated uncertainty of 2 % (k = 2). For the probed ILs, the surface tension decreases with increasing temperature and increasing alkyl chain length of the cation. Smaller values for the [B(CN)(4)](-)-based ILs compared to the [C(CN)(3)](-)-based ILs having the same cation were observed. The measured surface tensions agree with the limited number of experimental data found in the literature for the two IL families. A simple prediction based on the surface tension measured at 293 K and the temperature dependence of density showed good agreement with the measured temperature-dependent data. In comparison to other [alkyl-MIM](+)-based ILs with anions of varying molecular size, the fairly large surface tensions of the ILs investigated in this study could be attributed to the strong charge delocalization in their relatively small anions.



FAU Authors / FAU Editors

Fröba, Andreas Paul Prof. Dr.-Ing.
Lehrstuhl für Advanced Optical Technologies - Thermophysical Properties
Koller, Thomas Manfred Dr.-Ing.
Professur für Advanced Optical Technologies - Thermophysical Properties
Pohako-Esko, Kaija
Lehrstuhl für Chemische Reaktionstechnik
Rausch, Michael Heinrich Dr.-Ing.
Lehrstuhl für Technische Thermodynamik
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik


How to cite

APA:
Koller, T.M., Rausch, M.H., Pohako-Esko, K., Wasserscheid, P., & Fröba, A.P. (2015). Surface Tension of Tricyanomethanide- and Tetracyanoborate-Based lmidazolium Ionic Liquids by Using the Pendant Drop Method. Journal of Chemical and Engineering Data, 60, 2665-2673. https://dx.doi.org/10.1021/acs.jced.5b00303

MLA:
Koller, Thomas Manfred, et al. "Surface Tension of Tricyanomethanide- and Tetracyanoborate-Based lmidazolium Ionic Liquids by Using the Pendant Drop Method." Journal of Chemical and Engineering Data 60 (2015): 2665-2673.

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Last updated on 2019-18-07 at 07:31