Photoinduced electron transfer in [N]phenylenes
- 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 k(q) and the free energy change of the electron transfer (Delta G(CS)(0)) could be described by the Rehm- Weller equation. From the experimental results, a reorganization energy lambda 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 charge separation process can be determined. As the triplet quantum yield is nearly independent of the polarity, charge recombination leads to the population of the triplet state.
Author details: | Carsten DoscheGND, Wulfhard Mickler, Hans-Gerd LöhmannsröbenORCiDGND, Nicolas Agenet, K. Peter C. Vollhardt |
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URL: | http://www.sciencedirect.com/science/journal/10106030 |
DOI: | https://doi.org/10.1016/j.jphotochem.2006.12.038 |
ISSN: | 1010-6030 |
Publication type: | Article |
Language: | English |
Year of first publication: | 2007 |
Publication year: | 2007 |
Release date: | 2017/03/25 |
Source: | Journal of photochemistry and photobiology / A. - ISSN 1010-6030. - 188 (2007), 2-3, S. 371 - 377 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |