Untersuchungen zur Dispersion der komplexen Dielektrizitätskonstante wäßriger und nichtwäßriger Elektrolytlösungen

Behret, H.; Schmithals, F.; Barthel, J.

doi:10.1524/zpch.1975.96.1-3.073

Cited by 43 publications

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“…In the present case, when the electrolyte concentration is expressed in mol m-3, the resulting straight line has a slope of 22.2 m01"~ m1'2 F-I corresponding to a solvent dielectric constant equal to 30.5. This value is somewhat smaller than that quoted for pure methanol (32.7) and may indicate some degree of dielectric saturation due to the electrolyte (13).…”

Section: Nac10 As Electrolytecontrasting

confidence: 67%

Double layer structure at the mercury/methanol solution interface

Borkowska¹,

Fawcett²

1981

Can. J. Chem.

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. Can. J. Chem. 59,710 (1981). Differential capacity against electrode potential data are presented for the mercurylmethanol interface for a variety of salts at 25'C and for NaCIO, solutions as a function of temperature. Ionic specific adsorption from solutions of KF, NaCIO,, and LiBF, was shown to be absent on the basis of the usual criteria. The dielectric properties of the inner layer are discussed on the basis of the three-state model for solvent structure from which it is deduced that the majority of solvent molecules are adsorbed at mercury with their dipole vectors parallel to the interface. The deep minimum in inner layer differential capacity, which occurs at the same electrode charge density independent of the nature of the salt (-0.05 C m-2), corresponds to conditions for which the surface concentrations of the minority components, dipoles oriented with the field or against it, are equal. The experimental temperature coefficient of the inner layer capacity is a maximum at this charge density in agreement with the predictions of the three-state model.ZOFIA BORKOWSKA et W. RONALD FAWCETT. Can. J. Chem. 59, 710 (1981). On presente des donnees de capacite differentielle versus potentiel d'klectrode I'interface mercurelmethanol pour divers sels a 25°C et pour des solutions de NaCIO, a diverses temperatures. L'adsorption ionique specifique a partir de solutions de KF, de NaCIO, et de LiBF, est inexistante si on se base sur les criteres usuels. On discute des proprietes dielectriques de la couche interne en s'appuyant sur un modele de structure du solvant a trois etats ?t partir duquel on deduit que la plupart des moltcules du solvant sont adsorbees sur le mercure avec leurs dipoles orientes parallelement ?t I'interface. La profondeur minimale de la capacite differentielle de la couche interne, qui se produit pour la mime densite de charge a I'electrode indkpendamment de la nature du sel (-0,05 C m-Z), correspond aux conditions pour lesquelles les concentrations de surface des composants secondaires (orientation des dipoles avec ou contre le champ) sont Cgales. Le coefficient experimental de temperature de la capacitt de la couche interne atteint son maximum pour cette densite de charge en accord avec les previsions de la modele de trois etats.[Traduit par le journal]

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Section: Nac10 As Electrolytecontrasting

confidence: 67%

Double layer structure at the mercury/methanol solution interface

Borkowska¹,

Fawcett²

1981

Can. J. Chem.

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“…4 and, e.g., aqueous solutions of alkali metal salts where permittivity depression increases in the sequences Li > Na > K > Rb > Cs, and halides > nitrates (32,34,43).…”

Section: Discussion Of Permittivities and Relaxation Times General Asmentioning

confidence: 99%

“…Details of this (b) equipment are given in refs. (3,36) based on the 'know-how' acquired with preceding apparatus (31)(32)(33)(34). Purification of solvents, preparation of solutions, and measurements are carried out under a positive pressure of solvent saturated nitrogen gas such that the solutions are screened against evaporation and are never exposed to the atmosphere (3,4,36).…”

Section: Methods Of Travelling Wavesmentioning

confidence: 99%

Dielectric properties of nonaqueous electrolyte solutions

Barthel¹,

Buchner²

1986

Pure and Applied Chemistry

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-High frequency permittivity of non-aqueous electrolyte solutions and their solvents is discussed in the framework of time domain and frequency domain methods. Evaluation of data is performed on the basis of models presupposing one or more relaxation processes. Depression of the solvent permittivity, relaxation times of the solvent molecules, and dispersion amplitudes and relaxation times of ion-pair relaxation are investigated with regard to actual theories underlying these phenomena. Information is obtained on structural and dynamical properties of classes of electrolyte solutions based on rotic H-bonding, dipolar aprotic, and low permittivity solvents and mixtures of solvents.

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“…Einleitung Die Erweiterung des MeBbereichs der vorangehenden Mitteilungen [1,2] um den Bereich des R-Bandes (26,5-40 GHz) [3] war AnlaB für eine kritische Revision des Transmissionsverfahrens, das sich ais das für Messungen an Elektrolytlosungen geeignetste Verfahren erwiesen hat [1][2][3][4][5][6]. Einleitung Die Erweiterung des MeBbereichs der vorangehenden Mitteilungen [1,2] um den Bereich des R-Bandes (26,5-40 GHz) [3] war AnlaB für eine kritische Revision des Transmissionsverfahrens, das sich ais das für Messungen an Elektrolytlosungen geeignetste Verfahren erwiesen hat [1][2][3][4][5][6].…”

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“…Die Lage der nach den verschiedenen Methoden erhaltenen -Werte innerhalb der gegenseitigen Fehlergrenzen stützt die Betrachtungen. [2] diskutiert. (5a) und GÌ.…”

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Untersuchungen zur Dispersion der komplexen Dielektrizitätskonstante wäßriger und nichtwäßriger Elektrolytlösungen

Barthel¹,

Krüger²,

Schollmeyer³

1977

Zeitschrift Für Physikalische Chemie

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Aqueous Alkali Salt Solutions / DC in the Gigahertz RangeThe construction of a measuring cell for the R-band (26.5-40 GHz) and the measuring assembly is described. Optimization of the instrumentation for transmission measurements based upon the theory of time independent, source free -ports yields high accuracy also in the range of highly concentrated electrolyte solutions.The results of absorption measurement on aqueous electrolyte solutions (KF, CsF; LiBr, KBr, CsBr; KJ, CsJ; LiClOj, NaC104) at 25°C in the frequency range 1-40 GHz are reported. Data analysis is based on statistical methods.Die Konstruktion einer MeBzelle für das R-Band (26,5-40 GHz) und der Versuchsaufbau werden beschrieben. Die Optimierung der Einrichtungen für Transmissionsmessungen auf Grund der Théorie der zeitunabhângigen, quellfreien Tore ergibt hohe Genauigkeit auch im Gebiet hochkonzentrierter Elektrolytlösungen.Die Ergebnisse von Absorptionsmessungen an waBrigen Elektrolytlösungen (KF, CsF; LiBr, KBr, CsBr; KJ, CsJ; LiC104, NaC104) bei 25°C im Frequenzbereich 1-40 GHz werden mitgeteilt. Die Datenanalyse stützt sich auf statisti sche Methoden. * Derzeitige Adressen: Univ. Regensburg, Fachbereich Chemie (J.B.);

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Untersuchungen zur Dispersion der komplexen Dielektrizitätskonstante wäßriger und nichtwäßriger Elektrolytlösungen

Cited by 43 publications

References 0 publications

Double layer structure at the mercury/methanol solution interface

Double layer structure at the mercury/methanol solution interface

Dielectric properties of nonaqueous electrolyte solutions

Untersuchungen zur Dispersion der komplexen Dielektrizitätskonstante wäßriger und nichtwäßriger Elektrolytlösungen

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