Dielectric spectroscopy study on ionic liquid microemulsion composed of water, TX-100, and BmimPF6

Chen, Zhen and Nozaki, Ryusuke (2012) Dielectric spectroscopy study on ionic liquid microemulsion composed of water, TX-100, and BmimPF6. The journal of chemical physics, 136 24: 244505.1-244505.9. doi:10.1063/1.4730037

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Author Chen, Zhen
Nozaki, Ryusuke
Title Dielectric spectroscopy study on ionic liquid microemulsion composed of water, TX-100, and BmimPF6
Formatted title
Dielectric spectroscopy study on ionic liquid microemulsion composed of water, TX-100, and BmimPF6
Journal name The journal of chemical physics   Check publisher's open access policy
ISSN 0021-9606
1089-7690
Publication date 2012-06
Year available 2012
Sub-type Article (original research)
DOI 10.1063/1.4730037
Open Access Status File (Publisher version)
Volume 136
Issue 24
Start page 244505.1
End page 244505.9
Total pages 9
Place of publication College Park, MD United States
Publisher American Institute of Physics
Collection year 2013
Language eng
Formatted abstract
We report here a broadband dielectric spectroscopy study on an ionic liquid microemulsion (ILM) composed of water, Triton X-100 (TX-100), and 1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF 6). It is found that the phase behavior of this ILM can be easily identified by its dielectric response. The dielectric behavior of the ILM in the GHz range is consistent with that of TX-100water mixtures with comparable water-to-TX-100 weight ratio. It consists of the relaxations due to ethylene oxide (EO) unit relaxation, hydration water dynamics, andor free water dynamics. The water content dependence of the EO unit relaxation suggests that this relaxation involves dynamics of hydration water molecules. In the IL-in-water microemulsion phase, it is found that bmimPF 6 molecules are preferentially dissolved in water when their concentration in water is lower than the solubility. An additional dielectric relaxation that is absent in the TX-100water mixtures is observed in the frequency range of 10 7-10 8 Hz for this ILM. This low-frequency relaxation is found closely related to the bmimPF 6 molecule and could be attributed to the hopping of its cationsanions between the anioniccationic sites.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Non HERDC
 
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Citation counts: TR Web of Science Citation Count  Cited 7 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 21 Mar 2013, 12:05:25 EST by Zhen Chen on behalf of School of Civil Engineering