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摘要
The static dielectric permittivity epsilon(S) ("static dielectric constant") is an important quantity for characterizing the solvation capability of a solvent. The past two decades have seen the advent of ionic liquids low-melting organic salts as intriguing alternatives to volatile organic solvents. While for non-conducting media epsilon(S) is readily measured by electrical capacitance methods, such methods fail for electrical conductors because the samples are short-circuited by their intrinsic electrical conductivity. In dielectric theory epsilon(S) is defined as the zero-frequency limit of the real part of the frequency-dependent complex dielectric permittivity. This definition provides a recipe to determine epsilon(S) by dielectric relaxation spectroscopy. The paper reviews the achievements in characterizing and understanding the static dielectric constant of Ionic Liquids with particular focus on work in the author's laboratory.
- 出版日期2014-4
