FLUORESCENCE QUENCHING KINETIC-MODEL FOR A BOUND AND PARTITIONED QUENCHER IN MICELLES

A kinetic model for quenching of a fluorescent probe in micelles is an alysed. The probe is totally incorporated into the micelles. The quenc her distributes between water and the micellar pseudophase in two diff erent ways; i.e. by binding and by partition. The model is analyticall y solved under the assumption that quenching of the probe is much fast er than the quencher exchange either between the two phases or between partition and binding sites within the same micelle. Equations for th e time-resolved and steady-state fluorescence intensities are derived. The model is applied to the quenching of a carboxylated zinc phthaloc yanine fluorescence by diethyl-aniline in CTAC micelles.