Investigation of fractal properties of clusters of sorby molecules under anhygilation processes on inhomogeneous surface

Abstract

The paper investigates the annihilation processes between the molecules of rose bengal dye, a donor of triplet energy, and the molecules of the aromatic hydrocarbon anthracene, an acceptor of triplet energy, adsorbed on the silica surface SiO2 in the temperature range 218 … 293, K. The rate constants of homo- and heteroannihilation of luminophore molecules in a wide temperature range are determined. It is established that the energy transfer processes in the initial (after photoexcitation) periods of phosphorescence decay are described by Inokuti-Hirayama equations, and the kinetics of phosphorescence decay becomes similar to the fractal one in the medium-time and long-time periods.