Abstract
NMR quadruple splitting measurements are a useful technique to investigate the adsorption behavior of ions near to charged surfaces in liq. crystals made of surfactants of different headgroups. In the present paper we show the differences in lithium and sodium adsorption on dodecyl carboxylate and dodecyl sulfate bilayers as a function of surfactant concn. and for two temps. To this purpose we ...
Abstract
NMR quadruple splitting measurements are a useful technique to investigate the adsorption behavior of ions near to charged surfaces in liq. crystals made of surfactants of different headgroups. In the present paper we show the differences in lithium and sodium adsorption on dodecyl carboxylate and dodecyl sulfate bilayers as a function of surfactant concn. and for two temps. To this purpose we mixed the pure surfactants and also mixts. of the lithium and sodium surfactants with octanol as a cosurfactant in appropriate ratios and concns. to obtain liq. crystals. It turned out that the measured specific ion effects are much more pronounced in the case of carboxylates than for sulfates.
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