Probing the Surface Tension of Ionic Liquids Using the Langmuir Principle
Shimizu K, Heller B, Maier F, Steinrück HP, Canongia Lopes JN (2018)
Publication Status: Published
Publication Type: Journal article
Publication year: 2018
Journal
Publisher: AMER CHEMICAL SOC
Book Volume: 34
Pages Range: 4408-4416
Journal Issue: 14
DOI: 10.1021/acs.langmuir.7b04237
Abstract
At 298 K, the surface tension of ionic liquids (ILs) of the 1-alkyl-3-methylimidazolium bis- (trifluoromethylsulfonyl)imide series, [CnC1,Im][NTf2 ], ranges 36 from around 35 mN center dot m(-1) for [C2C1 Im][NTf2] to just below 30 mN center dot m(-1)for [C(12)C(1)Im][NTf2]. However, the decrease rate along the series is not constant: a large decrease from [C(2)C(1)Im][NTf2] to [C(8)C(1)Im][NTf2] is followed by almost constant values from [C(8)C(1)Im][NTf2] to [C(12)C(1)Im][NTf2]. Such behavior is hard to interpret from a molecular point of view without suitable information about the free-surface structure of the different ILs. In this work, we have successfully used the Langmuir principle in combination with structural data obtained from angle-resolved Xray photoelectron spectroscopy experiments and molecular dynamics simulations, to predict the correct surface tension trend along the IL series. The concepts unveiled for this particular homologous IL family can be easily extended to other systems.
Authors with CRIS profile
Bettina Heller
Lehrstuhl für Physikalische Chemie II
Florian Maier
Lehrstuhl für Physikalische Chemie II
Hans-Peter Steinrück
Lehrstuhl für Physikalische Chemie II
Involved external institutions
Portugal (PT)How to cite
APA:
Shimizu, K., Heller, B., Maier, F., Steinrück, H.-P., & Canongia Lopes, J.N. (2018). Probing the Surface Tension of Ionic Liquids Using the Langmuir Principle. Langmuir, 34(14), 4408-4416. https://doi.org/10.1021/acs.langmuir.7b04237
MLA:
Shimizu, Karina, et al. "Probing the Surface Tension of Ionic Liquids Using the Langmuir Principle." Langmuir 34.14 (2018): 4408-4416.
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