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  Revealing competitive Forster-type resonance energy-transfer pathways in single bichromophoric molecules

Hofkens, J., Cotlet, M., Vosch, T., Tinnefeld, P., Weston, K. D., Ego, C., et al. (2003). Revealing competitive Forster-type resonance energy-transfer pathways in single bichromophoric molecules. Proceedings of the National Academy of Sciences of the United States of America, 100(23), 13146-13151.

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Hofkens, J., Author
Cotlet, M., Author
Vosch, T., Author
Tinnefeld, P., Author
Weston, K. D., Author
Ego, C.1, Author           
Grimsdale, Andrew1, Author           
Müllen, Klaus1, Author           
Beljonne, D., Author
Bredas, J. L., Author
Jordens, S., Author
Schweitzer, G., Author
Sauer, M., Author
De Schryver, F., Author
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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 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.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 59877
Other: P-03-188
 Degree: -

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Title: Proceedings of the National Academy of Sciences of the United States of America
  Alternative Title : P. Natl. Acad. Sci. USA
Source Genre: Journal
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Pages: - Volume / Issue: 100 (23) Sequence Number: - Start / End Page: 13146 - 13151 Identifier: -