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Title: Communication: Unusual structure and transport in ionic liquid-hexane mixtures

Abstract

Ionic liquids having a sufficiently amphiphilic cation can dissolve large volume fractions of alkanes, leading to mixtures with intriguing properties on molecular length scales. The trihexyl(tetradecyl)phosphonium cation paired with the bis(trifluoromethylsulfonyl)amide anion provides an ionic liquid that can dissolve large mole fractions of hexane. We present experimental results on mixtures of n-C 6D 14 with this ionic liquid. High- energy X-ray scattering studies reveal a persistence of the characteristic features of ionic liquid structure even for 80% dilution with n-C 6D 14. NMR self-diffusion results reveal decidedly non-hydrodynamic behavior where the self-diffusion of the neutral, non-polar n-C 6D 14 is on average a factor of 21 times faster than for the cation. Exploitation of the unique structural and transport properties of these mixtures may lead to new opportunities for designer solvents for enhanced chemical reactivity and interface science.

Authors:
 [1];  [1];  [1]
  1. Rutgers Univ., Piscataway, NJ (United States). Dept. of Chemistry and Chemical Biology
Publication Date:
Research Org.:
Rutgers Univ., Piscataway, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1173217
Alternate Identifier(s):
OSTI ID: 1228581
Grant/Contract Number:
SC0001780
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 142; Journal Issue: 12; Journal ID: ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; X-ray, self-diffusion, ionic-liquid, hexane

Citation Formats

Liang, Min, Khatun, Sufia, and Castner, Edward W. Communication: Unusual structure and transport in ionic liquid-hexane mixtures. United States: N. p., 2015. Web. doi:10.1063/1.4916388.
Liang, Min, Khatun, Sufia, & Castner, Edward W. Communication: Unusual structure and transport in ionic liquid-hexane mixtures. United States. doi:10.1063/1.4916388.
Liang, Min, Khatun, Sufia, and Castner, Edward W. Sat . "Communication: Unusual structure and transport in ionic liquid-hexane mixtures". United States. doi:10.1063/1.4916388. https://www.osti.gov/servlets/purl/1173217.
@article{osti_1173217,
title = {Communication: Unusual structure and transport in ionic liquid-hexane mixtures},
author = {Liang, Min and Khatun, Sufia and Castner, Edward W.},
abstractNote = {Ionic liquids having a sufficiently amphiphilic cation can dissolve large volume fractions of alkanes, leading to mixtures with intriguing properties on molecular length scales. The trihexyl(tetradecyl)phosphonium cation paired with the bis(trifluoromethylsulfonyl)amide anion provides an ionic liquid that can dissolve large mole fractions of hexane. We present experimental results on mixtures of n-C6D14 with this ionic liquid. High- energy X-ray scattering studies reveal a persistence of the characteristic features of ionic liquid structure even for 80% dilution with n-C6D14. NMR self-diffusion results reveal decidedly non-hydrodynamic behavior where the self-diffusion of the neutral, non-polar n-C6D14 is on average a factor of 21 times faster than for the cation. Exploitation of the unique structural and transport properties of these mixtures may lead to new opportunities for designer solvents for enhanced chemical reactivity and interface science.},
doi = {10.1063/1.4916388},
journal = {Journal of Chemical Physics},
number = 12,
volume = 142,
place = {United States},
year = {Sat Mar 28 00:00:00 EDT 2015},
month = {Sat Mar 28 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 16 works
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