Abstract: In this paper, the fluorescence spectra of porphyrinanthraquinone, porphyrin-an-thraquinone Zn(Ⅱ), and parent porphyrin were studied by means of fluorescence. The ener-gy of singlet excited state(E_s), fluorescence quantum yield and quench percentage were esti-mated. It is demonstrated by the data of fluorescence quench that the intramolecular electron transfer, which leads to the formation of intramolecular electric charge separating-state, oc-curred under excitation of light indeed. In the meantime, the effects of axial coordination and solvent on fluorescence property of PAQcompounds were studied.

Key words: Photoinduction, Porphyrin-anthraquinone, Intramolecular electron transfer, Fluorescence method