title: Photophysical study of photoinduced electron transfer in a bis-thiophene substituted peryleneimide.
abstract: Based on femtosecond time-resolved spectroscopy and single photon timing experiments, intramolecular photoinduced charge transfer has been investigated in two systems containing a peryleneimide chromophore (P) and thiophene (T) groups. The first compound bearing a single thiophene ring (PT1) is used as model and shows a behavior similar to P, studied previously, while in the compound with two thiophene rings attached (PT2) electron transfer from the thiophene donor to the peryleneimide acceptor is observed in benzonitrile. Femtosecond fluorescence upconversion and femtosecond transient absorption experiments in benzonitrile indicate that this ion-pair state formation occurs in 19 ps. This ion-pair state then decays with two time constants of 1400 and 820 ps, probably corresponding to different conformations of the thiophene rings.
authors.affiliation: Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001, Heverlee, Belgium.
authors.forename: Eduard
authors.initials: E
authors.lastname: Fron
authors.forename: Marc
authors.initials: M
authors.lastname: Lor
authors.forename: Roberto
authors.initials: R
authors.lastname: Pilot
authors.forename: Gerd
authors.initials: G
authors.lastname: Schweitzer
authors.forename: Haluk
authors.initials: H
authors.lastname: Dincalp
authors.forename: Steven
authors.initials: S
authors.lastname: De Feyter
authors.forename: Jens
authors.initials: J
authors.lastname: Cremer
authors.forename: Peter
authors.initials: P
authors.lastname: Bauerle
authors.forename: Klaus
authors.initials: K
authors.lastname: Mullen
authors.forename: Mark
authors.initials: M
authors.lastname: Van der Auweraer
authors.forename: Frans C
authors.initials: FC
authors.lastname: De Schryver
mesh_terms: D004563:Electrochemistry; D004583:Electrons; D007094:Imides / Q000737:chemistry*; D008027:Light; D015394:Molecular Structure; D010084:Oxidation-Reduction / Q000528:radiation effects; D010569:Perylene / Q000031:analogs & derivatives / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*
chemical_list: D007094:Imides; D013876:Thiophenes; D010569:Perylene