title: [Photogeneration of singlet oxygen by psoralens].
abstract: Photosensitized luminescence of singlet (1 delta g) molecular oxygen with the maximum at 1272 nm has been found in solutions of psoralen, angelicin and 8-methoxypsoralen in CCl4. The luminescence excitation spectra, quantum yields of generation (gamma g) and rate constants of quenching (Kq) of 1 delta g by psoralens have been measured. The gamma g values 0,0055, 0,0026, 0,002 and Kq values 9 X 10(3), 11 X 10(3) and 12 X X 10(3) have been obtained for psoralen, angelicin and 8-methoxypsoralen, respectively. The role of 1 delta g in a photobiological action of psoralens is discussed.
mesh_terms: D005363:Ficusin; D011564:Furocoumarins; D008730:Methoxsalen; D010100:Oxygen; D010777:Photochemistry; D026082:Singlet Oxygen
chemical_list: D011564:Furocoumarins; D026082:Singlet Oxygen; C011659:angelicin; D005363:Ficusin; D010100:Oxygen; D008730:Methoxsalen
vernacular_title: Fotogeneratsiia singletnogo kisloroda psoralenami.