Permittivity increments in non-dipolar solvents due to high electric fields
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 70, 1348-1355
- https://doi.org/10.1039/f29747001348
Abstract
Measurements of the change in relative permittivity (Δε) have been made as a function of applied electric field (E) at 22°C for the non-dipolar liquids n-pentane, n-hexane, n-heptane, n-octane, n-nonane, n-decane, cyclohexane, benzene, carbon tetrachloride and carbon disulphide. The measurements were made at fields of up to 2 × 107 V m–1, the Δε being detected via the change in frequency of an oscillator as measured using a computing counter. The range of Δε/E2 values obtained were from about 10 to 30 × 10–20m2V–2. The values were generally larger than could be attributed to the anisotropy of polarizability, particularly for the nearly spherical carbon tetrachloride molecule and much larger than the expected contributions due to electrostriction and the electrocaloric effect. The measured values are undoubtedly made up from a number of effects, including the Kielich local fluctuating intermolecular effects.Keywords
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