Title: Photoinduced electron transfer in a rigid first generation triphenylamine core dendrimer substituted with a peryleneimide acceptor
Authors: Lor, Marc ×
Thielemans, Jan
Viaene, Lucien
Cotlet, Mircea
Hofkens, Johan
Weil, T
Hampel, C
Mullen, K
Verhoeven, Jan Willem
Van der Auweraer, Mark
De Schryver, Frans #
Issue Date: Jan-2002
Publisher: Amer chemical soc
Series Title: Journal of the American Chemical Society vol:124 issue:33 pages:9918-9925
Abstract: The electron-transfer process of a first generation dendrimer with a triphenylamine core substituted with one peryleneimide chromophore at the rim (N1P1) was investigated by steady-state and time-resolved spectroscopic techniques in two different solvents of medium and low polarity. Single photon counting experiments showed a fast charge separation and a thermally activated back reaction, which is uncommon for a polyaryl bridge or long-distance through-space electron transfer. The four exponential fluorescence decay can be traced to the presence of two subsets of molecules, which are constitutional isomers of N1P1. Although formally N1P1 resembles a donor-bridge-acceptor compound, detailed analysis of the data shows that the electron transfer occurs by a through-space mechanism. This amine core dendrimer has peculiar and unique characteristics resulting in the observation of efficient back transfer and delayed peryleneimide fluorescence in diethyl ether at 293 K and very long-lived charge recombination luminescence at 77 K.
ISSN: 0002-7863
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
Chemistry - miscellaneous
× corresponding author
# (joint) last author

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