title: Generation dependent singlet-singlet annihilation within multichromophoric dendrimers studied by polychromatic transient absorption.
abstract: Intramolecular kinetic processes in a series of shape-persistent meta- and para-substituted polyphenylene dendrimers bearing different peryleneimide chromophores at the rim have been investigated using time-resolved polychromatic transient absorption measurements. The influence of the generation number and different substitution patterns upon these processes was revealed by comparing different compounds. In particular, in multichromophoric systems a singlet-singlet annihilation process was detected. The corresponding time constant was dependent on the generation number.
authors.affiliation: Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001 Heverlee, Belgium.
authors.forename: Sven
authors.initials: S
authors.lastname: Jordens
authors.forename: Gino
authors.initials: G
authors.lastname: De Belder
authors.forename: Marc
authors.initials: M
authors.lastname: Lor
authors.forename: Gerd
authors.initials: G
authors.lastname: Schweitzer
authors.forename: Mark
authors.initials: M
authors.lastname: Van der Auweraer
authors.forename: Tanja
authors.initials: T
authors.lastname: Weil
authors.forename: Andreas
authors.initials: A
authors.lastname: Herrmann
authors.forename: Uwe M
authors.initials: UM
authors.lastname: Wiesler
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen
authors.forename: Frans C
authors.initials: FC
authors.lastname: De Schryver