ENERGY-TRANSFER IN SOLID-SOLUTIONS AND ON FRACTAL POLYMER SURFACES

The electronic energy transfer from rhodamine B to several acceptor dyes in cellulose nitrate solid solution and on the surface of membrane filters of the same polymer has been investigated at room temperature. In polymer matrix the Forster theory has been confirmed and critical distances R(o) have been calculated from the theoretical equation and have also been determined by energy transfer experiments measuring the fluorescence decay time of the donor. Applying new fractal concepts to energy transfer in porous membranes, the fractal dimension of the polymer surface has been determined under several conditions. The values agree with other obtained by adsorption experiments.