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Dielectric Relaxation of Aqueous NaCl Solutions
Abstract
The complex dielectric permittivity of aqueous sodium chloride solutions has been determined in the frequency range 0.2 ≤ ν(GHz) ≤ 20 with a commercial dielectric measurement system based on a vector network analyzer. NaCl solutions 0.1 ≤ m (mol kg -1 ) ≤ 5 (mass fraction 0.005 ≤ w ≤ 0.23) were investigated at 5, 20, 25, and 35 °C. An improved calibration procedure of the dielectric measurement system for conducting samples was developed. The complex permittivity spectra have been represented by a Cole−Cole relaxation time distribution. Where possible, the obtained fitting parameters, static permittivity ε and relaxation time τ, and distribution parameter α, are compared with literature data to assess the performance of the instrument, which was found to be comparable to that of time domain and waveguide systems. Effective solvation numbers were deduced from the effect of NaCl concentration on ε. The data suggest that in addition to the irrotational bonding of water molecules by Na + ions, kinetic depolarization under slip boundary conditions determines the solution permittivity. A three-state model is proposed to describe the concentration dependence of τ.
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Cites
Solvent Structure, Dynamics, and Ion Mobility in Aqueous Solutions at 25 °C
Koneshan, S., Rasaiah, J. C., Lynden-Bell, R. M., & Lee, S. H. (1998) · The Journal of Physical Chemistry B · doi:10.1021/jp980642x · Cited by 965
Cited by
Cooperativity in Ion Hydration
Tielrooij, K. J., Garcia-Araez, N., Bonn, M., & Bakker, H. J. (2010) · Science · doi:10.1126/science.1183512 · Cited by 685
The Electrostatic Screening Length in Concentrated Electrolytes Increases with Concentration
Smith, A. M., Lee, A. A., & Perkin, S. (2016) · The Journal of Physical Chemistry Letters · doi:10.1021/acs.jpclett.6b00867 · Cited by 611
Wakai, C., Oleinikova, A., Ott, M., & Weingärtner, H. (2005) · The Journal of Physical Chemistry B · doi:10.1021/jp053946+ · Cited by 531
Understanding specific ion effects and the Hofmeister series
Gregory, K. P., Elliott, G. R., Robertson, H., Kumar, A., Wanless, E. J., Webber, G. B., Craig, V. S. J., Andersson, G. G., & Page, A. J. (2022) · Physical Chemistry Chemical Physics · doi:10.1039/d2cp00847e · Cited by 462
Interactions and dynamics in electrolyte solutions by dielectric spectroscopy
Buchner, R., & Hefter, G. (2009) · Physical Chemistry Chemical Physics · doi:10.1039/b906555p · Cited by 318
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Metadata
- Authors
- Buchner, R., Hefter, G. T., & May, P. M.
- Venue
- The Journal of Physical Chemistry A
- Publisher
- American Chemical Society (ACS)
- Published
- 1998-12-17
- Volume
- 103
- Issue
- 1
- Pages
- 1-9
- ISSN
- 1089-5639 (ISSN-L)
- 1520-5215
- OpenAlex
- W1989613186
- Cited by
- 541
- References
- 1
- FWCI
- 5.08
- Type
- journal article
- Language
- en
- Open access
- closed
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- Buchner, R., Hefter, G. T., & May, P. M. (1999). Dielectric Relaxation of Aqueous NaCl Solutions. The Journal of Physical Chemistry A. https://doi.org/10.1021/jp982977k
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