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Surface Characterization of 1-Butyl-3-methylimidazolium Br-, I-, PF6-, BF4-, (CF3SO2)2N-, SCN-, CH3SO3-, CH3SO4-, and (CN)2N- Ionic Liquids by Sum Frequency Generation
Abstract
Sum frequency generation spectroscopy, SFG, was used for the surface characterization at the gas-liquid interface of the 1-butyl-3-methylimidazolium cation combined with the following anions: Br-, I-, PF6-, BF4-, (CF3SO2)2N- (imide), SCN-, CH3SO3- (MeSO3), CH3SO4- (MS), and (CN)2N- (DCN). The SFG spectra obtained for the different ionic liquids were similar independent of the anion selected; therefore, a comprehensive analysis for the surface characterization of the ionic liquids' cation was focused only on the PF6- and Br- anion combinations. For an accurate identification of the vibrational modes observed, FT-IR and Raman spectroscopy in combination with isotopic labeling with deuterium and polarized Raman spectroscopy was used. The cation orientation was determined by analysis of polarization-dependent SFG spectra. For a compound dried in a vacuum to < or = 2 x 10(-5) Torr, the cation appears to be oriented with the ring laying flat along the surface plane and the butyl chain projecting into the gas phase independent of the anion identity.
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Cammarata, L., Kazarian, S. G., Salter, P. A., & Welton, T. (2001) · Physical Chemistry Chemical Physics · doi:10.1039/b106900d · Cited by 1,441
Cited by
Understanding Ionic Liquids at the Molecular Level: Facts, Problems, and Controversies
Weingärtner, H. (2008) · Angewandte Chemie International Edition · doi:10.1002/anie.200604951 · Cited by 1,543
Understanding Ionic Liquids through Atomistic and Coarse-Grained Molecular Dynamics Simulations
Wang, Y., Jiang, W., Yan, T., & Voth, G. A. (2007) · Accounts of Chemical Research · doi:10.1021/ar700160p · Cited by 331
Metadata
- Authors
- Rivera-Rubero, S., & Baldelli, S.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2006-02-14
- Volume
- 110
- Issue
- 10
- Pages
- 4756-4765
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2022438558
- Cited by
- 168
- References
- 1
- FWCI
- 6.01
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Surface Characterization of 1-Butyl-3-methylimidazolium Br-, I-, PF6-, BF4-, (CF3SO2)2N-, SCN-, CH3SO3-, CH3SO4-, and (CN)2N- Ionic Liquids by Sum Frequency Generation. https://app.cochat.ai/papers/10.1021/jp0563989
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- Rivera-Rubero, S., & Baldelli, S. (2006). Surface Characterization of 1-Butyl-3-methylimidazolium Br-, I-, PF6-, BF4-, (CF3SO2)2N-, SCN-, CH3SO3-, CH3SO4-, and (CN)2N- Ionic Liquids by Sum Frequency Generation. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp0563989
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