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Title of article :
Photoinduced electron transfer in [N]phenylenes
Author/Authors :
Carsten Dosche، نويسنده , , C. and Mickler، نويسنده , , W. and Lِhmannsrِben، نويسنده , , H.-G. and Agenet، نويسنده , , N. and Vollhardt، نويسنده , , K.P.C.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
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Abstract :
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 ( Δ G CS 0 ) could be described by the Rehm–Weller equation. From the experimental results, a reorganization energy λ of 0.7 eV was derived. olecular 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.
Keywords :
photoinduced electron transfer
Journal title :
Journal of Photochemistry and Photobiology:A:Chemistry
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