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Issue 3, 2017
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On the dielectric decrement of electrolyte solutions: a dressed-ion theory analysis

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Abstract

Based on the dressed-ion theory and a simple physical argument regarding the conductivity of the solution, we derive a relation between the ionic strength and dielectric constant of an electrolyte solution. At its simplest, this model gives the dielectric constant at low ionic strength I as εr(I) = εr(0)(1 + αI)−1, where α (the excess polarization) is directly related to the dressed-ion charge. One contribution to the origin of the dielectric decrement is thus seen to stem from the electrostatic screening of the ions in solution, with no solvent contributions necessary.

Graphical abstract: On the dielectric decrement of electrolyte solutions: a dressed-ion theory analysis

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Publication details

The article was received on 02 Nov 2016, accepted on 12 Dec 2016 and first published on 12 Dec 2016


Article type: Paper
DOI: 10.1039/C6CP07515K
Phys. Chem. Chem. Phys., 2017,19, 1982-1987

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    On the dielectric decrement of electrolyte solutions: a dressed-ion theory analysis

    R. A. X. Persson, Phys. Chem. Chem. Phys., 2017, 19, 1982
    DOI: 10.1039/C6CP07515K

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