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Photoinduced electron transfer in [N]phenylenes

Paper ID Volume ID Publish Year Pages File Format Full-Text
28421 44074 2007 7 PDF Available
Title
Photoinduced electron transfer in [N]phenylenes
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 (ΔGCS0) 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 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
[N]Phenylenes; Photoinduced electron transfer; [N]Phenylene dyads
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 188, Issues 2–3, 20 May 2007, Pages 371–377
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
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Price was $35.95
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Price after discount Only $4.95
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