Percolation of the Electronic Excitation Energy over Triplet States of Benzaldehyde in a Porous Sol-Gel Matrix

摘要

Migration of triplet excitations of benzaldehyde in porous sol-gel glass is studied within the frame-work of the cluster model by means of the method of capturing by traps. Dependences of the probability of excitation capture by a trap on the benzaldehyde concentration for different temperatures and concentrations of the energy acceptor are obtained. Analysis of dependences for universality and scaling is performed, and a substantial distinction between experimental and theoretical data is found. The result is explained by the effect of the topology of porous system of the matrix on percolation processes taking place in it.