Hydration Properties of Oxygen Containing Linear Heterohydrocarbons as Studied by Dielectric Relaxation Measurements

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Abstract
Complex permittivities of aqueous solutions of ethylene‐glycols, HO‐(CH2‐CH2‐O)n‐H (n = 1, 2, 3, 4, 4.1, 8.7, or 13.2, and of ethylene‐glycol dimethylethers, H3C‐O‐(CH2‐CH2‐O)n,‐CH3 (n = 1, 2, or 3), have been measured at 11 up to 13 frequencies in the range 2 to 40 GHz by an interferometric transmission method. A sum of relaxation functions has been fitted to the observed data to yield the hydration number and reorientation time of the hydration water. The values of these parameters are discussed and compared with those for poly (ethylene oxide) of different degree of polymerization and those for other series of organic solutes in order to get insight into the effect of various molecular parameters on the microdynamics of the surrounding water.

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