R. Elsebrock et M. Stockhausen, Dielectric spectroscopy of solutions of some alkylammonium salts in chloroform and 1-octanol, Z NATURFO A, 55(6-7), 2000, pp. 629-636
Citations number
23
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
Dielectric loss spectra between 1 MHz and 36 GHz have been measured at 20 d
egrees C for solutions of hexadecyl trimethylammonium bromide and chloride,
tetrahexylammonium bromide and tetrabutylammonium bromide in chloroform an
d 1-octanol (three solutes per solvent) at moderate and high concentrations
. The discussion is aimed at identifying relaxation processes involving ion
s. Describing the relaxational part of the spectra (after subtraction of th
e conductivity contribution) by a sum of spectral components, the lowest fr
equency component can be attributed to the solute in all cases. Its concent
ration dependence is indicative of two ionic relaxation processes differing
in physical nature. The solvent is partly involved in those processes; mor
eover a structure breaking effect is likely to occur in case of the alcohol
ic solvent. The results are also discussed in comparison with a molten alky
lammonium salt and with solutions of this and of inorganic salts.