On the dielectric decrement of electrolyte solutions: a dressed-ion theory analysis
| Autor: | Rasmus A. X. Persson |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Chemistry
Metal ions in aqueous solution General Physics and Astronomy Thermodynamics 02 engineering and technology Dielectric Electrolyte Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion Solvent Physics::Plasma Physics Ionic strength Physical and Theoretical Chemistry 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | Physical chemistry chemical physics : PCCP. 19(3) |
| ISSN: | 1463-9084 |
| Popis: | 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 er(I) = er(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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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