Dielectric dispersion in water + 2-hydroxypyridine solid mixtures.
The complex electric permittivity was measured in water + 2-hydroxypyridine (2HP) solid mixtures as a function of concentration, temperature and frequency. Just after freezing of diluted mixtures, (mole fraction of 2HP < 0.2) pronounced dielectric dispersion in the MHz region was observed. The dispersion disappears on cooling between -30 and -40 degrees C in a first-order phase transition. The dispersion was explained in terms of the movement of a guest molecule (2HP) in a clathratelike structure of ice.
Szala
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Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie 14, 50-383 Wrocław, Poland.
Orzechowski
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