期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 19, 期 3, 页码 1982-1987出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp07515k
关键词
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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 l as epsilon(r)(l) = epsilon(r)(O)(1 + alpha l) (-1), where alpha (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.
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