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Glasslike behavior in aqueous electrolyte solutions
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View: Figures


Image of FIG. 1.
FIG. 1.

Dependence of viscosity and NMR relaxation rate on salt concentration. Points: Viscosities (Ref. 8) of aqueous solutions of NaCl (○), (◻), and (△). Lines: Fits to Eq. (2) with (NaCl), 12.0 , and 11.9 and , 3.4, and 3.9, respectively. (Inset) Points: NMR quadrupolar relaxation rates of (○) and (◻) in aqueous solutions normalized to the rate extrapolated to pure water (Ref. 9) Lines: Fits to Eq. (2) with (fixed) and the and 4.1 .

Image of FIG. 2.
FIG. 2.

Dielectric relaxation (DR) and optical Kerr effect (OKE) spectroscopy data on water at and their fits. (a) Dielectric loss spectrum of water fitted to the sum of two Debye equations with relaxation times of (dark gray) and (light gray) (Ref. 17). (b) Relaxation of water measured by time-domain OKE spectroscopy (solid line) and fit (dashed line) by the Cole–Cole function and two damped harmonic-oscillator functions centered at 66 and . (Inset) The OKE data transformed to the frequency domain: Data (dots), fit (solid line), and a decomposition of the fit into Cole–Cole (light gray area) and harmonic-oscillator functions (dashed lines).

Image of FIG. 3.
FIG. 3.

Fit parameters [using the Cole–Cole function, Eq. (1)] for OKE and DR data as a function of salt concentration. (a) Fit parameters ( and ) for OKE data on aqueous NaCl (◇) and (○) solutions. The values of the relaxation-time have been fitted to Eq. (2) with fixed at (NaCl, dotted curve) or (, solid curve) and found as 0.07 (NaCl) and 2.0 . (b) Fit parameters ( and ) for DR data in aqueous solutions. The dashed lines are in all cases added only as a guide to the eye. (Inset) The static dielectric constant measured with DR spectroscopy (○) and the calculated (Ref. 17) concentration of water bound to the cation (◻) as functions of concentration.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Glasslike behavior in aqueous electrolyte solutions