title: Electron transfer from triplet thymine and thymidine to lipoic acid.
abstract: Electron transfer from the triplet excited state of thymine or thymidine to the disulphide compound lipoic acid (RSSR) was studied using KrF laser flash photolysis (248 nm, 20 ns). The electron transfer reaction rate constants, measured at 310 nm, were determined to be 1.3 x 10(10) M-1 s-1 and 6.9 x 10(9) M-1 s-1 for thymine and thymidine respectively. The transient absorbance at 400 nm in the presence of the quencher is attributed to the anion radical of lipoic acid.
authors.affiliation: Laboratory of Radiation Chemistry, Shanghai Institute of Nuclear Research, Academia Sinica, China.
authors.forename: Z R
authors.initials: ZR
authors.lastname: Lian
authors.forename: S D
authors.initials: SD
authors.lastname: Yao
authors.forename: W F
authors.initials: WF
authors.lastname: Wang
authors.forename: J
authors.initials: J
authors.lastname: Luo
authors.forename: J S
authors.initials: JS
authors.lastname: Zhang
authors.forename: N Y
authors.initials: NY
authors.lastname: Lin
mesh_terms: D004579:Electron Transport; D007834:Lasers; D008956:Models, Chemical; D010084:Oxidation-Reduction; D010782:Photolysis; D013053:Spectrophotometry; D008063:Thioctic Acid / Q000737:chemistry*; D013936:Thymidine / Q000737:chemistry* / Q000528:radiation effects; D013941:Thymine / Q000737:chemistry* / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D008063:Thioctic Acid; D013941:Thymine; D013936:Thymidine