Abstract
THE existence of secondary regions of dielectric dispersion for a number of polar liquids has been inferred by several workers from radio-frequency and microwave dispersion data, as these extrapolate at high frequencies to values considerably larger than the square of the refractive index. Notable examples of this behaviour are water and the lower aliphatic alcohols1, for which at temperatures from 0° to 60° C. the principal dipole dispersion region lies in the range of centimetre to metre wave-lengths. Saxton2 has discussed the question in detail for water, methyl and ethyl alcohols, and found that his data, together with results in the wave-length region 50–150μ, could be described by postulating a damped resonance dispersion in the millimetre wave-length region.
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References
Lane, J. A., and Saxton, J. A., Proc. Roy. Soc., A, 213, 400 (1952). Dalbert, Magat and Surdut, Bull. Soc. Chim. France, 16, D345 (1949).
Saxton, J. A., Proc. Roy. Soc., A, 213, 473 (1952).
Davidson, D. W., and Cole, R. H., J. Chem. Phys., 19, 1484 (1952).
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HASSION, F., COLE, R. Dielectric Relaxation Processes in Ethanol. Nature 172, 212–213 (1953). https://doi.org/10.1038/172212a0
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DOI: https://doi.org/10.1038/172212a0
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