title: Fluorescence lifetimes and emission patterns probe the 3D orientation of the emitting chromophore in a multichromophoric system.
abstract: 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.
authors.affiliation: Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium.
authors.forename: Wouter
authors.initials: W
authors.lastname: Schroeyers
authors.forename: Renaud
authors.initials: R
authors.lastname: Vallée
authors.forename: Digambara
authors.initials: D
authors.lastname: Patra
authors.forename: Johan
authors.initials: J
authors.lastname: Hofkens
authors.forename: Satoshi
authors.initials: S
authors.lastname: Habuchi
authors.forename: Tom
authors.initials: T
authors.lastname: Vosch
authors.forename: Mircea
authors.initials: M
authors.lastname: Cotlet
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen
authors.forename: Jörg
authors.initials: J
authors.lastname: Enderlein
authors.forename: Frans C
authors.initials: FC
authors.lastname: De Schryver