Photonic Switching of Photoinduced Electron Transfer in a Dihydropyrene−Porphyrin−Fullerene Molecular Triad

Photonic control of photoinduced electron transfer has been demonstrated in a dimethyldihydropyrene (DHP) porphyrin (P) fullerene (C60) molecular triad. In the DHP−P−C60 form of the triad, excitation of the porphyrin moiety is followed by photoinduced electron transfer to give a DHP−P•+−C60 •- charg...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2004-04, Vol.126 (15), p.4803-4811
Main Authors: Liddell, Paul A, Kodis, Gerdenis, Andréasson, Joakim, de la Garza, Linda, Bandyopadhyay, Subhajit, Mitchell, Reginald H, Moore, Thomas A, Moore, Ana L, Gust, Devens
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
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Summary:Photonic control of photoinduced electron transfer has been demonstrated in a dimethyldihydropyrene (DHP) porphyrin (P) fullerene (C60) molecular triad. In the DHP−P−C60 form of the triad, excitation of the porphyrin moiety is followed by photoinduced electron transfer to give a DHP−P•+−C60 •- charge-separated state, which evolves by a charge shift reaction to DHP•+−P−C60 •-. This final state has a lifetime of 2 μs and is formed in an overall yield of 94%. Visible (≥300 nm) irradiation of the triad leads to photoisomerization of the DHP moiety to the cyclophanediene (CPD). Excitation of the porphyrin moiety of CPD−P−C60 produces a short-lived (
ISSN:0002-7863
1520-5126
DOI:10.1021/ja039800a