Title: Photoinduced electron-transfer in perylenediimide triphenylamine-based dendrimers: single photon timing and femtosecond transient absorption spectroscopy
Authors: Fron, Eduard ×
Pilot, Roberto
Schweitzer, Gerd
Qu, Jianqiang
Herrmann, Andreas
Muellen, Klaus
Hofkens, Johan
Van der Auweraer, Mark
De Schryver, Frans #
Issue Date: 2008
Publisher: Royal Society of Chemistry
Series Title: Photochemical & Photobiological Sciences vol:7 issue:5 pages:597-604
Abstract: The excited state dynamics of two generations perylenediimide chromophores substituted in the bay area with dendritic branches bearing triphenylamine units as well as those of the respective reference compounds are investigated. Using single photon timing and multi-pulse femtosecond transient absorption experiments a direct proof of a reversible charge transfer occurring from the peripheral triphenylamine to the electron acceptor perylenediimide core is revealed. Femtosecond pump-dump-probe experiments provide evidence for the ground state dynamics by populating excited vibronic levels. It is found by the means of both techniques that the rotational isomerization of the dendritic branches occurs on a time scale that ranges up to 1 ns. This time scale of the isomerization depends on the size of the dendritic arms and is similar both in the ground and excited state.
ISSN: 1474-905X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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