H-1 NMR studies of aqueous micellar solutions of N-dodecyl-N,N-dimethyl-N-benzylammonium chloride

H-1 NMR studies of the micellization process in N-dodecyl-N,N-dimethyl-N-be nzylammonium chloride (DBeAC) were carried out. The spectra were measured a t concentrations below and above the critical micelle concentration (CMC), The chemical shifts and Nuclear Overhauser Effect (NOE) measurements were a nalyzed as a function of the concentration. This allowed us to provide expe rimental evidence that the benzyl group of DBeAC changes its position durin g micellization and, as a consequence, is located inside the micelle. (C) 1 999 Academic Press.