Long‐Range Energy Transfer in the Case of Inhomogeneous Spatial Distributions and Indirect Donor‐Donor Interaction

Abstract

A b s t r a c t. On the basis of Forster kinetics concerning long-range energy transfer caused by dipole-dipole interaction the it-deactivation-law has been derived under the assumption of a homo-1 geneous spatial acceptor distribution (at the end of the forties). Recently, in particular ultra-short time fluorescence and absorption measurements have shown that on the one hand this law holds in a wide range of physical conditions, but that under other circumstances the experimental results strongly deviate from the it-law. I n the present paper it is shown that a unified treatment of inhomogeneous distributions and indirect donor-donor interaction via the acceptors can qualitatively, and i n certain cases also quantitatively, remove the discrepancies mentioned. The analysis yields new parameters of dynamical processes.