[Photosensitized luminescence of singlet oxygen in solution].

The Photoinduced afterglow of singlet oxygen was found in air saturated solutions of protoporphyrin and naphtacene in carbon tetrachloride. The excitation spectra coincide with the absorption spectra of the pigments. The lifetime is near to 7 msec, the quantum yield--to 3-10(-5). The emission maximum lies at 1270 nm. The data suggest that the luminescence is generated by oxygen in the 1 delta g state produced by the energy transfer from triplet molecules of the pigments to O2.