Generation dependent singlet-singlet annihilation within multichromophoric dendrimers studied by polychromatic transient absorption.
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.
Jordens
Sven
S
Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, 3001 Heverlee, Belgium.
De Belder
Gino
G
Lor
Marc
M
Schweitzer
Gerd
G
Van der Auweraer
Mark
M
Weil
Tanja
T
Herrmann
Andreas
A
Wiesler
Uwe M
UM
Müllen
Klaus
K
De Schryver
Frans C
FC