Photophysicel properties of a porphyrin-phthalocyanine Iieterodmer covalently linked with a dipentoxy chain have been studied. Absorption spectra show that there b weak exciton coupling between the two chromophorae in the ground state. Fluorescence spectra show that intramolecular energy t r h f e r from porphyrin to phthalocyanine moiety o c c w in competition with electron transfer. The efficiency of these two proceases depends upon the mutual orientation of the two chromophona.The effect of solvent polarity on the intramolecular processes ie also d i s c d .