Angular Dependence of Fluorescence from Chlorophyll a in Monolayers

Abstract

Angular distribution of fluorescence from monomolecular films containing chlorophyll a spread on water has been determined. The transition moment of the red fluorescence is found to make an angle ≤20° with the water surface, while the transition moment responsible for the blue absorption band is estimated to make an angle of ≃28° with it. Both angles are measured in the porphyrin plane.