The Effect of Aliphatic Alcohols on Fluorescence Quenching and Fluorescence Polarization of Luminescence Probes in Hexadecyltrimethylammonium Bromide Micelles

The fluorescence quenching of the indole chromophore by NO−2 and the fluorescence depolarization of several luminescence probes in aqueous solutions containing hexadecyltrimethylammonium bromide (HDTBr) were measured as a function of added C2–C4 aliphatic alcohol concentration. The fluorescence decay profiles of pyrene in the micellar solutions were also measured to estimate the aggregation number of the micelles. The addition of n‐butyl alcohol significantly reduces the fluorescence quenching rate and the aggregation number and increases the extent of fluorescence depolarization in HDTBr micellar systems. The addition of ethyl alcohol shows a similar but smaller effect.