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Title: Revealing competitive Forster-type resonance energy-transfer pathways in single bichromophoric molecules
Authors: Hofkens, Johan ×
Cotlet, Mircea
Vosch, Tom
Tinnefeld, P
Weston, KD
Ego, C
Grimsdale, A
Mullen, K
Beljonne, D
Bredas, JL
Jordens, Sven
Schweitzer, Gerd
Sauer, M
De Schryver, Frans #
Issue Date: Jan-2003
Publisher: Natl acad sciences
Series Title: Proceedings of the National Academy of Sciences of the United States of America vol:100 issue:23 pages:13146-13151
Abstract: We demonstrate measurements of the efficiency of competing Forster-type energy-transfer pathways in single bichromophoric systems by monitoring simultaneously the fluorescence intensity, fluorescence lifetime, and the number of independent emitters with time. Peryleneimide end-capped fluorene trimers, hexamers, and polymers with interchromophore distances of 3.4, 5.9, and on average 42 nm, respectively, served as bichromophoric systems. Because of different energy-transfer efficiencies, variations in the interchromophore distance enable the switching between homo-energy transfer (energy hopping), singlet-singlet annihilation, and singlet-triplet annihilation. The data suggest that similar energy-transfer pathways have to be considered in the analysis of single-molecule trajectories of donor/acceptor pairs as well as in natural and synthetic multichromophoric systems such as light-harvesting antennas, oligomeric fluorescent proteins, and dendrimers. Here we report selectively visualization of different energy-transfer pathways taking place between identical fluorophores in individual bichromophoric molecules.
ISSN: 0027-8424
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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