ORGN 2 |
| Klaus Müllen, Andreas Herrmann, Tanja Weil, and Ingo Oesterling. Max-Planck-Institute for Polymer Research, Ackermannweg 10, Mainz, D-55021, Germany |
| The arrangement of multiple pigments within natural light harvesting complexes plays an important role in photosynthesis. We have synthesized a wide variety of artificial multichromophoric architectures constructed from polyphenylene dendrimers and perylene dyes. Polyphenylene dendrimers consist exclusively of benzene rings which impart shape persistence as well as chemical and photochemical inertness. The class of perylene dyes combines chemical and photochemical stability with high extinction coefficients and high fluorescence quantum yields. An exactly defined number of dyes are incorporated at the center of the dendrimer, within the dendritic branches and/or at the rim. Additionally, the orientation and the distance of the chromophores can be adjusted by means of the shape persistent scaffold and a coupling chemistry which results in rigid connectivities between the dendrimer and the dyes. Dendritic multichromophoric ensembles consisting either of one type of chromophore or of dyes with different optical behaviours are constructed. Energy transfer and electron transfer processes are characterized by single molecule spectroscopy. |
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Molecular Mimicry of Photosynthesis
8:30 AM-12:00 PM, Sunday, August 22, 2004 Pennsylvania Convention Center -- Ballroom B, Oral
Division of Organic Chemistry |