title: Study of picosecond processes of an intercalated dipyridophenazine Cr(III) complex bound to defined sequence DNAs using transient absorption and time-resolved infrared methods.
abstract: Picosecond transient absorption (TA) and time-resolved infrared (TRIR) measurements of rac-[Cr(phen)2(dppz)](3+) () intercalated into double-stranded guanine-containing DNA reveal that the excited state is very rapidly quenched. As no evidence was found for the transient electron transfer products, it is proposed that the back electron transfer reaction must be even faster (<3 ps).
authors.affiliation: School of Chemistry and Chemical Biology, Centre for Synthesis and Chemical Biology, University College Dublin, Dublin 4, Ireland. susan.quinn@ucd.ie.
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Devereux
authors.forename: Páraic M
authors.initials: PM
authors.lastname: Keane
authors.forename: Suni
authors.initials: S
authors.lastname: Vasudevan
authors.forename: Igor V
authors.initials: IV
authors.lastname: Sazanovich
authors.forename: Michael
authors.initials: M
authors.lastname: Towrie
authors.forename: Qian
authors.initials: Q
authors.lastname: Cao
authors.forename: Xue-Zhong
authors.initials: XZ
authors.lastname: Sun
authors.forename: Michael W
authors.initials: MW
authors.lastname: George
authors.forename: Christine J
authors.initials: CJ
authors.lastname: Cardin
authors.forename: Noel A P
authors.initials: NA
authors.lastname: Kane-Maguire
authors.forename: John M
authors.initials: JM
authors.lastname: Kelly
authors.forename: Susan J
authors.initials: SJ
authors.lastname: Quinn
mesh_terms: D002857:Chromium / Q000737:chemistry*; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D004247:DNA / Q000737:chemistry* / Q000235:genetics; D008968:Molecular Conformation; D010619:Phenazines / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors
chemical_list: D056831:Coordination Complexes; D010619:Phenazines; D002857:Chromium; D004247:DNA