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.
| Identifer | oai:union.ndltd.org:Potsdam/oai:kobv.de-opus-ubp:1246 |
| Date | January 2007 |
| Creators | Dosche, Carsten, Mickler, Wulfhard, Löhmannsröben, Hans-Gerd, Agent, Nicolas, Vollhardt, K. Peter C. |
| Publisher | Universität Potsdam, Mathematisch-Naturwissenschaftliche Fakultät. Institut für Chemie, Extern. Extern |
| Source Sets | Potsdam University |
| Language | English |
| Detected Language | English |
| Type | Postprint |
| Format | application/pdf |
| Source | Journal of Photochemistry and Photobiology A: Chemistry, In Press, Accepted Manuscript |
| Rights | http://opus.kobv.de/ubp/doku/urheberrecht.php |
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