Ionic transport in glycerol-water mixtures

Angulo-Sherman, Abril; Mercado-Uribe, Hilda

doi:10.1007/s11581-014-1209-x

Cited by 3 publications

(1 citation statement)

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“…As previously discussed in section 3.1, under the influence of an external electric field, free ions in water move towards the electrodes leading to an enhancement in di electric permittivity (electrode polarization effect). To explain the electrode polarization effect, the dielectric spectra of water in the temperature range from 10 • C to 60 • C as shown in figure 4(a), is fitted by the Cole-Davidson relaxation function [30,[39][40][41] given as,…”

Section: Inferences On Hydrogen Bond Network In Water From the Root-m...mentioning

confidence: 99%

Inferences on hydrogen bond networks in water from isopermitive frequency investigations

Geethu

Ranganathan²,

Satapathy³

2018

J. Phys.: Condens. Matter

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Intermolecular hydrogen bonds play a crucial role in determining the unique characteristics of liquid water. We present low-frequency (1 Hz-40 MHz) dielectric spectroscopic investigations on water in the presence and absence of added solutes at different temperatures from 10 °C to 60 °C. The intersection points of temperature dependent permittivity contours at the vicinity of isopermitive frequency (IPF) in water are recorded and its properties are presumed to be related to the extent of hydrogen bond networks in water. IPF is defined as the frequency at which the relative permittivity of water is almost independent of temperature. The set of intersection points of temperature dependent permittivity contours at the vicinity of IPF are characterized by the mean [Formula: see text] and root-mean-square deviation/standard deviation [Formula: see text] associated with IPF. The tunability of M by the addition of NaCl and MgCl salt emphasizes the strong correlation between the concentration of ions in water and the M . The [Formula: see text] is surmised to be related to the orientational correlations of water dipoles as well as to the intermolecular hydrogen bond networks in water. Further, alterations in [Formula: see text] is observed with the addition of kosmotropic and chaotropic solutes into water and are thought to arise due to the restructuring of hydrogen bond networks in water in presence of added solutes. Notably, the solute induced reconfiguration of hydrogen bond networks in water or often-discussed structure making/breaking effects of the added solutes in water can be inferred, albeit qualitatively, by examining the M and [Formula: see text]. Further, the Gaussian deconvoluted OH-stretching modes present in the Raman spectra of water and aqueous solutions of IPA and DMF strongly endorses the structural rearrangements occurring in water in presence of kosmotropes and chaotropes and are in line with the results derived from the root-mean-square deviation in IPF.

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Section: Inferences On Hydrogen Bond Network In Water From the Root-m...mentioning

confidence: 99%