In this study, bimolecular fluorescence quenching and excimer formation reactions of pyrenesulfonate (PyS⁻) on the surface of tetradecyltrimethylammonium chloride (C14TACl) micelles were investigated. The fluorescence decay behavior of the quenching reactions was well analyzed using the TachiyaInfelta model, indicating that the reactions are governed by two-dimensional diffusion on the micellar surface. For anthraquinonesulfonate quenchers, differences in the number of sulfonate groups led to variations in adsorption modes and diffusional mobility on the positively charged micellar surface, resulting in distinct reaction rates. Furthermore, the PyS⁻ excimer formation was found not only to be diffusion-controlled but also influenced by the molecular reorientation process required for π–π stacking between PyS⁻ molecules.
Research papers (publications of university or research institution)
