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Title: Energy dissipation in multichromophoric single dendrimers
Authors: De Schryver, Frans ×
Vosch, Tom
Cotlet, M
Van der Auweraer, Mark
Mullen, K
Hofkens, Johan #
Issue Date: Jul-2005
Publisher: Amer chemical soc
Series Title: Accounts of Chemical Research vol:38 issue:7 pages:514-522
Abstract: Single-molecule spectroscopy of well-chosen dendritic multichromophoric systems allows investigation of fundamental photophysical processes such as energy or electron transfer in much greater detail than the respective ensemble measurements. In dendrimers with multiple chromophores, energy hopping and transfer to the chromophore with the energetically lowest S, state was observed. if more than one chromophore is in an excited state in one molecule, annihilation, either singlet-triplet or singlet-singlet, can occur. In the latter case, a higher singlet state is populated opening new deactivation pathways. In the presence of an electron donor, reversible electron transfer could be observed, and the rate constants of forward and backward electron transfer were established. The value of these rate constants fluctuates time-correlated with the rotational motion of the dendrimer arms and the mobility of the embedding matrix.
URI: 
ISSN: 0001-4842
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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