Accumulation and distribution of energy quenching products

The quantum yield of irreversible energy quenching, as well as the accumulation and distribution of its products, were studied by means of differential and integral encounter theories and a competing approach based on the superposition approximation. The lower-order concentration corrections to the Stern-Volmer constant are found, but only the non-binary contributions to them are different. Such a difference between the theories was shown to have an impact on the accumulation and final distribution of the charged products, especially at short distances. This effect is of principle importance but does not affect significantly the main results of any encounter theory. (C) 1998 Elsevier Science B.V. All rights reserved.