title: Magnetic field effect on photoinduced electron transfer between [Cu(phen)2]2+ and DNA.
abstract: The magnetic field effect (MFE) on the photoinduced electron transfer (PET) reaction between the [Cu(phen)2]2+ complex and DNA has been studied in homogeneous buffer medium and in reverse micelles. The copper complex on photoexcitation can oxidize DNA in a deoxygenated environment. A prominent MFE is found even in a homogeneous aqueous medium for the triplet born radicals. The process of partial intercalation of [Cu(phen)2]2+ complex within DNA is responsible for such a rare observation. In reverse micelles, the MFE is not very much prominent because of the large separation distance between the component radicals of the geminate radical ion pairs generated through PET.
authors.affiliation: Chemical Sciences Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700 064, India.
authors.forename: Debarati
authors.initials: D
authors.lastname: Dey
authors.forename: Adity
authors.initials: A
authors.lastname: Bose
authors.forename: Nikhil
authors.initials: N
authors.lastname: Pramanik
authors.forename: Samita
authors.initials: S
authors.lastname: Basu
mesh_terms: D000042:Absorption; D004247:DNA / Q000737:chemistry*; D004579:Electron Transport; D008280:Magnetics; D008823:Micelles; D010618:Phenanthrolines / Q000737:chemistry*
chemical_list: D008823:Micelles; D010618:Phenanthrolines; C014741:bis(1,10-phenanthroline)copper(2+) ion; D004247:DNA