Fluorescence lifetimes and emission patterns probe the 3D orientation of the emitting chromophore in a multichromophoric system.
In this Communication, we report on the fluorescence behavior of an individual first generation multichromophoric dendrimer. The fact that each of the chromophores in time acts as a fluorescent trap is demonstrated by directly probing the dipole orientation of the emitting chromophore by means of defocused wide-field imaging and comparing experimental and calculated emission patterns. It is shown that in such cases the electromagnetic boundary condition effect results in discrete changes in the fluorescence lifetime as a function of time for individual dendrimers.
Schroeyers
Wouter
W
Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium.
Vallée
Renaud
R
Patra
Digambara
D
Hofkens
Johan
J
Habuchi
Satoshi
S
Vosch
Tom
T
Cotlet
Mircea
M
Müllen
Klaus
K
Enderlein
Jörg
J
De Schryver
Frans C
FC