Interaction between ionic liquid cation and water: Infrared predissociation study of [bmim]+·(H2O)n clusters
Abstract
The infrared predissociation spectra of [bmim]+·(H2O)n, n = 1–8, in the 2800–3800 cm–1 region are presented and analyzed with the help of electronic structure calculations. The results show that the water molecules solvate [bmim]+ by predominately interacting with the imidazolium C2–H moiety for the small n = 1 and 2 clusters. This is characterized by a redshifted and relatively intense C2–H stretch. For n ≥ 4 clusters, hydrogen-bond interactions between the water molecules drive the formation of ring isomers which interact on top of the imidazolium ring without any direct interaction with the C2–H. The water arrangement in [bmim]+·(H2O)n is similar to the low energy isomers of neutral water clusters up to the n = 6 cluster. This is not the case for the n = 8 cluster, which has the imidazolium ring disrupting the otherwise preferred cubic water structure. Here, the evolution of the solvation network around [bmim]+ illustrates the competing [bmim]+–water and water–water interactions.
- Authors:
-
- Univ. of Wisconsin, Madison, WI (United States)
- Publication Date:
- Research Org.:
- Univ. of Wisconsin, Madison, WI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1358403
- Grant/Contract Number:
- SC0010326
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Chemistry Chemical Physics. PCCP
- Additional Journal Information:
- Journal Volume: 18; Journal Issue: 28; Journal ID: ISSN 1463-9076
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Voss, Jonathan M., Marsh, Brett M., Zhou, Jia, and Garand, Etienne. Interaction between ionic liquid cation and water: Infrared predissociation study of [bmim]+·(H2O)n clusters. United States: N. p., 2016.
Web. doi:10.1039/c6cp02730j.
Voss, Jonathan M., Marsh, Brett M., Zhou, Jia, & Garand, Etienne. Interaction between ionic liquid cation and water: Infrared predissociation study of [bmim]+·(H2O)n clusters. United States. https://doi.org/10.1039/c6cp02730j
Voss, Jonathan M., Marsh, Brett M., Zhou, Jia, and Garand, Etienne. Wed .
"Interaction between ionic liquid cation and water: Infrared predissociation study of [bmim]+·(H2O)n clusters". United States. https://doi.org/10.1039/c6cp02730j. https://www.osti.gov/servlets/purl/1358403.
@article{osti_1358403,
title = {Interaction between ionic liquid cation and water: Infrared predissociation study of [bmim]+·(H2O)n clusters},
author = {Voss, Jonathan M. and Marsh, Brett M. and Zhou, Jia and Garand, Etienne},
abstractNote = {The infrared predissociation spectra of [bmim]+·(H2O)n, n = 1–8, in the 2800–3800 cm–1 region are presented and analyzed with the help of electronic structure calculations. The results show that the water molecules solvate [bmim]+ by predominately interacting with the imidazolium C2–H moiety for the small n = 1 and 2 clusters. This is characterized by a redshifted and relatively intense C2–H stretch. For n ≥ 4 clusters, hydrogen-bond interactions between the water molecules drive the formation of ring isomers which interact on top of the imidazolium ring without any direct interaction with the C2–H. The water arrangement in [bmim]+·(H2O)n is similar to the low energy isomers of neutral water clusters up to the n = 6 cluster. This is not the case for the n = 8 cluster, which has the imidazolium ring disrupting the otherwise preferred cubic water structure. Here, the evolution of the solvation network around [bmim]+ illustrates the competing [bmim]+–water and water–water interactions.},
doi = {10.1039/c6cp02730j},
journal = {Physical Chemistry Chemical Physics. PCCP},
number = 28,
volume = 18,
place = {United States},
year = {Wed Jun 29 00:00:00 EDT 2016},
month = {Wed Jun 29 00:00:00 EDT 2016}
}
Web of Science
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