Title: Singlet-singlet annihilation leading to a charge-transfer intermediate in chromophore-end-capped pentaphenylenes
Authors: Fron, Eduard ×
Schweitzer, Gerd
Jacob, Josemon
Van Vooren, Antoine
Beljonne, David
Mullen, Klaus
Hofkens, Johan
Van der Auweraer, Mark
De Schryver, Frans #
Issue Date: Jun-2007
Publisher: Wiley-v c h verlag gmbh
Series Title: Chemphyschem vol:8 issue:9 pages:1386-1393
Abstract: The excited-state properties of two peryleneimide chromophore end-capped pentaphenylene compounds were investigated in detail using femtosecond transient absorption and single-photon timing experiments. Singlet-singlet annihilation was found to promote one chromophore into a higher excited state and results in the formation of an ultra-short-living intermediate charge-transfer (CT) state in the S-n-S-1 deactivation pathway. In low-polarity solvents, this CT state is found to be energetically higher than the first excited state and thus cannot be populated via one-photon excitation. The observed CT state decoys with a time constant of about I ps to form the lowest singlet excited state. These results demonstrate the potential use of the singlet-singlet annihilation as a novel tool in studying reactions occurring in states that are energetically above the S-1.
ISSN: 1439-4235
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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