Photophysical properties of a chlorin, a potent sensitizer for photochemotherapy

— Photophysical and photodynamic properties of a ehlorin type molecule derived from hydroxyethylvinyldeuteroporphyrin are presented. It photosensitizes singlet oxygen production as efficiently as mesotetraphenylporphin. The high absorptions of both its ground and triplet states in the red (660 nm) make it a potent photosensitizer which might act not only by photo-oxidation via singlet oxygen but also by radicals produced via sequential biphotonic absorption.