Site of Dye Solubilization in Surfactant Micelles

Abstract

Comparisons of visible spectra of fluorinated analogs of the dye Orange OT and two of its isomers in dodecane, in a pyridine/water mixture, in micelles of dodecylpyridinium bromide, and in micelles of cetylpyridinium chloride suggest that the solubilized dye molecules prefer an environment which is more polar than that of the micelle's hydrocarbon core. Comparisons of nuclear magnetic resonance spectra of the dyes in deuterated pentane, in a pyridine/D2O mixture, and in micelles of dodecylpyridinium bromide lead to the same conclusion.