A PICOSECOND FLASH-PHOTOLYSIS STUDY OF THE BIPHOTONIC IONIZATION OF PSORALEN DERIVATIVES AND ETHIDIUM-BROMIDE

Authors
SHAQUIRI Z KESKINOVA E SPASSKY A ANGELOV D
Citation
Z. Shaquiri et al., A PICOSECOND FLASH-PHOTOLYSIS STUDY OF THE BIPHOTONIC IONIZATION OF PSORALEN DERIVATIVES AND ETHIDIUM-BROMIDE, Photochemistry and photobiology, 65(3), 1997, pp. 517-521
Citations number
38
Categorie Soggetti
Biophysics,Biology
Journal title
Photochemistry and photobiology → ACNP
ISSN journal
00318655
Volume
65
Issue
3
Year of publication
1997
Pages
517 - 521
Database
ISI
SICI code
0031-8655(1997)65:3<517:APFSOT>2.0.ZU;2-M
Abstract
A picosecond flash-photolysis study of the ionization of psoralen deri vatives and ethidium bromide, either free or intercalated in DNA, was carried out. A single short high-intensity 355 nm laser pulse with a f ew tens of J/cm(2) dose, was found to be sufficient for achieving clos e to the ultimate 100% yield of ionization of either free or DNA-bound psoralens, Interestingly, the photoionization efficiency of ethidium bromide is considerably reduced upon intercalation.