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Comparison of interionic/intermolecular vibrational dynamics between ionic liquids and concentrated electrolyte solutions
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10.1063/1.3280028
/content/aip/journal/jcp/131/24/10.1063/1.3280028
http://aip.metastore.ingenta.com/content/aip/journal/jcp/131/24/10.1063/1.3280028

Figures

Image of FIG. 1.
FIG. 1.

Log-log plots of Kerr transients for (a) , (b) , and (c) PrCa solution of (), as examples. Fit curves from 3 ps are shown by blue. Residuals of the fits are also shown above Kerr transients.

Image of FIG. 2.
FIG. 2.

FT Kerr spectra of ILs, (a) , (b) , (c) , and (d) . Contributions of the picosecond orientational relaxation processes were subtracted.

Image of FIG. 3.
FIG. 3.

FT Kerr spectra of electrolyte solutions of in the following solvents, (a) , (b) MeOH, (c) PrCa, and (d) PEG. Contributions of the picosecond orientational relaxation processes were subtracted.

Image of FIG. 4.
FIG. 4.

Expanded view of intraionic vibrational modes of in ILs. From top to bottom, , , , and . Band decomposition is illustrated for ; solid lines are for cisoid form, dashed lines are for transoid form, and red line is total fit.

Image of FIG. 5.
FIG. 5.

Expanded view of intraionic vibrational modes of in electrolyte solutions. Band decompositions are illustrated; solid lines are for cisoid form, dashed lines are for transoid form, and red line is total fit. Abbreviations and denote cisoid and transoid, respectively.

Image of FIG. 6.
FIG. 6.

S-N-S stretching mode of in ILs and electrolyte solutions with both low and high concentrations. Solid lines are for ILs and electrolyte solutions at high concentration and red dashed lines are for electrolyte solutions at low concentration .

Image of FIG. 7.
FIG. 7.

Kerr spectra at for ILs and fit functions. From top to bottom, , , , and . Black dots: FT Kerr spectrum, red solid line: entire fit, blue dotted line: Ohmic function, blue dashed line: antisymmetrized Gaussian functions , green solid line: Lorentzian function, and blue solid line: sum of Ohmic and antisymmetrized Gaussian functions (interionic part).

Image of FIG. 8.
FIG. 8.

Kerr spectra at for electrolyte solutions and fit functions. Black dots: FT Kerr spectrum, red solid line: entire fit, blue dotted line: Ohmic function, blue dashed line: antisymmetrized Gaussian functions , green solid line: Lorentzian function, and blue solid line: sum of Ohmic and antisymmetrized Gaussian functions (interionic/intermolecular part).

Tables

Generic image for table
Table I.

Physical properties of ILs and electrolyte solutions. Values in parenthesis are pure solvent data.

Generic image for table
Table II.

Mean polarizabilities and polarizability anisotropies of ions and solvents at gas phase condition estimated by ab initio quantum chemistry calculations based on the level of theory. Values of volume and are also given.

Generic image for table
Table III.

Triexponential fit parameters of Kerr transients for ILs and electrolyte solutions.

Generic image for table
Table IV.

Fit parameters of Kerr spectra for ILs and electrolyte solutions.

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/content/aip/journal/jcp/131/24/10.1063/1.3280028
2009-12-31
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Comparison of interionic/intermolecular vibrational dynamics between ionic liquids and concentrated electrolyte solutions
http://aip.metastore.ingenta.com/content/aip/journal/jcp/131/24/10.1063/1.3280028
10.1063/1.3280028
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