DIELECTRIC-PROPERTIES OF 1-HEXANOL IN MESITYLENE SOLUTION ON ADMIXTURE OF AROMATIC DIHYDRIC ALCOHOLS

Broadband dielectric relaxation spectra (at 20 to 40-degrees-C) are re ported for three liquid alcohol/nonpolar solvent systems: Binary hexan ol/mesitylene mixtures and two corresponding ternary mixtures, where 5 percent of hexanol are replaced by a dihydric alcohol, namely resorci nol (1,3-dihydroxybenzene) or 2,2'-dihydroxydiphenyl. The concentratio n of the polar substance(s) ranges from dilute solutions to pure alcoh ol(s). The lower frequency relaxation contribution, which generally is the more dominating the higher the alcohol concentration, is addition ally enhanced by the diol admixture in the case of low and moderate co ncentrations. This can be understood as a hetero-association effect, t he diol molecules playing a bridging role, which also leads to an incr ease in the mean lifetime of associated states.