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Title: Intramolecular energy transfer in bis-porphyrins containing diimine chelates of variable geometry as spacers
Authors: Hungerford, G ×
Van der Auweraer, Mark
Chambron, JC
Heitz, V
Sauvage, JP
Pierre, JL
Zurita, D #
Issue Date: Jan-1999
Publisher: Wiley-v c h verlag gmbh
Series Title: Chemistry - a European Journal vol:5 issue:7 pages:2089-2100
Abstract: Free-base porphyrin dimers bridged by either 6,6'-diphenyl-2,2'-bipyridine or 2,9-diphenyl-1,10-phenanthroline spacers were synthesized and characterized. Metallation of one of the porphyrins with Zn-II allowed us to study intramolecular energy-transfer processes between the Zn-II-porphyrin photoreceptor and the free-base porphyrin energy acceptor by time-correlated single-photon counting. The rate of energy transfer was shown to depend strongly on the nature of the bridge, being enhanced by a factor of nearly 6 when comparing the (cis) phenanthroline bridge with the trans-bipyridine bridge. A detailed analysis of the fluorescence decays suggests the presence of two slowly interconverting conformers for the 6,6'-djphenyl-2,2'-bipyridine spacer.
URI: 
ISSN: 0947-6539
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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