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URN: urn:nbn:de:kobv:517-opus-12463
URL: http://opus.kobv.de/ubp/volltexte/2007/1246/
Dosche, Carsten ;
Mickler, Wulfhard ;
Löhmannsröben, Hans-Gerd ;
Agent, Nicolas ;
Vollhardt, K. Peter C.
Photoinduced electron transfer in [N]phenylenes
Kurzfassung in Englisch
First studies of electron transfer in [N]phenylenes were performed in bimolecular quenching reactions of angular [3]- and triangular [4]phenylene with various electron acceptors. The relation between the quenching rate constants kq and the free energy change of the electron transfer (ΔG0CS ) could be described by the Rehm-Weller equation. From the experimental results, a reorganization energy λ of 0.7 eV was derived.
Intramolecular electron transfer reactions were studied in an [N]phenylene bichomophore and a corresponding reference compound. Fluorescence lifetime and quantum yield of the bichromophor display a characteristic dependence on the solvent polarity, whereas the corresponding values of the reference compound remain constant. From the results, a nearly isoenergonic ΔG0CS can be determined. As the triplet quantum yield is nearly independent of the polarity, charge recombination leads to the population of the triplet state.
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Freie Schlagwörter (Englisch): |
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[N]phenylenes , photoinduced electron transfer , [N]phenylene dyads |
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RVK - Regensburger Verbundklassifikation: |
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RVK |
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Collection: |
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Universität Potsdam / Aufsätze (Pre- und Postprints) / Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie / Physikalische Chemie |
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Institut 1: |
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Institut für Chemie |
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Institut 2: |
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Extern |
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DDC-Sachgruppe: |
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Chemie |
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Dokumentart: |
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c Postprint |
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Schriftenreihe: |
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Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, ISSN 1866-8372 |
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Bandnummer: |
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paper 023 |
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Quelle: |
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Journal of Photochemistry and Photobiology A: Chemistry, In Press, Accepted Manuscript |
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Sprache: |
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Englisch |
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Erstellungsjahr: |
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2007 |
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Publikationsdatum: |
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12.02.2007 |
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Bemerkung: |
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This paper is accepted for publication in:
Journal of Photochemistry and Photobiology A: Chemistry
ISSN: 1010-6030
DOI: 10.1016/j.jphotochem.2006.12.038
Copyright © 2007 Elsevier |