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Dielectric spectroscopy: a new old tool for studying ions in solution

Hefter, G. and Buchner, R. (2008) Dielectric spectroscopy: a new old tool for studying ions in solution. In: 235th National Meeting of the American Chemical Society, 6 - 10 April, New Orleans.

Abstract

Dielectric relaxation spectroscopy (DRS) measures the complex dielectric response of a sample to an applied oscillating electric field as a function of the field frequency in the microwave (GHz) region. The basic methodology of DRS was developed over 50 years ago but the technique has been largely ignored by solution chemists. Making use of advances in measurement and related technologies, modern DRS can provide important insights into the nature of the species present in electrolyte solutions. DRS has a unique sensitivity for detecting solvent-separated ion pairs in solution. In many cases DRS can provide detailed information about the thermodynamics, kinetics and sometimes even structures of ion pairs. Analysis of the solvent contributions to DR spectra yields data on the solvation of the ions. This talk will briefly describe modern DRS and will illustrate its capabilities for understanding the nature of electrolyte solutions using recent measurements from the authors' laboratories.

Publication Type: Conference Paper
Murdoch Affiliation: School of Chemical and Mathematical Science
Conference Website: http://oasys2.confex.com/acs/235nm/techprogram/ind...
URI: http://researchrepository.murdoch.edu.au/id/eprint/2089
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