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  Femtosecond fluorescence Anisotropy kinetics as a signature of ultrafast electronic energy transfer in bichromophoric molecules

Fidler, V., Kapusta, P., Nepras, M., Schroeder, J., Rubtsov, I. V., & Yoshihara, K. (2002). Femtosecond fluorescence Anisotropy kinetics as a signature of ultrafast electronic energy transfer in bichromophoric molecules. Zeitschrift für Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics, 216, 589-603.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-F4B0-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-93D5-B
Genre: Journal Article

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599747.pdf (Publisher version), 991KB
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 Creators:
Fidler, V., Author
Kapusta, P., Author
Nepras, M., Author
Schroeder, J.1, Author              
Rubtsov, I. V., Author
Yoshihara, K., Author
Affiliations:
1Department of Spectroscopy and Photochemical Kinetics, MPI for biophysical chemistry, Max Planck Society, ou_578624              

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 Abstract: Ultrafast time resolved fluorescence anisotropy decay measurements were performed to gain insight into the energy gap dependence of donor-acceptor inter-chromophoric coupling within one supra-molecule. Three new compounds, each consisting of two semi-rigidly linked and strongly coupled chromophores, were designed and synthesized for this study. Their general structure is donor-spacer-acceptor, where "donor" is phenylamino, pyrenylamino, or benzanthronylamino moiety, and acceptor is aminobenzanthrone. While being similar structurally, the compounds differ significantly in the excitation energy difference of the two chromophores in a supra-molecule. Experimental data show an ultrafast initial fluorescence emission anisotropy decrease (within less then I ps) when the excited state energies of the interacting chromophores are close to each other or equal. No such fast fluorescence anisotropy dynamics is observed for a compound with a large energy gap.

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Language(s): eng - English
 Dates: 2002
 Publication Status: Published in print
 Pages: -
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 Rev. Method: Peer
 Identifiers: eDoc: 17059
ISI: 000175425000003
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Title: Zeitschrift für Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics
Source Genre: Journal
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Pages: - Volume / Issue: 216 Sequence Number: - Start / End Page: 589 - 603 Identifier: ISSN: 0942-9352