Regensburg 2007 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 22: POSTER: INTERNAL SYMPOSIUM Optical Spectrosopy

CPP 22.13: Poster

Wednesday, March 28, 2007, 16:00–18:30, Poster B

Photophysics of functionalized perylenbisimides as building blocks for dye - quantum dot nanoassemblies — •Daniela Täuber, Danny Kowerko, Jörg Schuster, and Christian von Borczyskowski — Center of nanostructured materials and analytics, TU-Chemnitz, 09107 Chemnitz

Organic - inorganic building blocks promise numerous applications in nanoelectronics, biology and physics. Organic dye molecules in combination with semiconductor quantum dots are good candidates to study chemistry and physics of organic-inorganic interfaces at molecular level. However, characterization of such complexes first requires careful analysis of the elementary building blocks. Thus we report here on polarization resolved single molecule spectroscopy as a powerful tool for characterizing the different rotational and conformational dynamics of functionalized perylenebisimides. Such functionalized dyes with different anchor groups are used by us in prototype dye quantum dot nanoassemblies. Perylenebisimide dyes are known to show rich dynamics, including intramolecular flips which will result in intensity fluctuations. Polarization resolved detection allows for a discrimination of those intramolecular flips against rotations of the complete molecule.