AN INVESTIGATION OF THE ENVIRONMENT OF SOME AROMATIC ALCOHOL SOLUBILIZED AQUEOUS IONIC MICELLAR SOLUTIONS BY PROTON MAGNETIC-RESONANCE SPECTROSCOPY

Chemical shifts in aqueous sodium dodecylsulfate(SDS) micellar solutio n solublizing phenol, catechol, resorcinol, hydro-quinone have been me asured to investigate solubilization properties. Proton nuclear magnet ic resonance frequencies of solubilizates as well as those of the alph a-methylene, middle methylene and terminal methyl of SDS shift linearl y as a function of solubilizate concentration. From the plots of obser ved chemical shift (nu) vs solubilizate concentration, slope (a) and s olubilizate free chemical shift(nu(0)) are obtained. They are very inf ormative to solubilization site of the systems. Catechol and phenol so lubilized SDS and catechol solubilized dodecylpyridinium chloride(DPC) , dodecyltrimethylammonium bromide(DTAB) systems are studied using the same method to compare head group effect and middle methylene proton signal splitting. It is proposed that phenol and catechol are inserted into micellar interior and the number of methylenes assigned to the h igher field peaks is 5.0+/-0.5.