Dresden 2011 – scientific programme

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MO: Fachverband Molekülphysik

MO 11: Poster: Transport and Spectroscopy in Molecular Nanostructures (Intersectional Session with CPP)

MO 11.5: Poster

Tuesday, March 15, 2011, 18:00–20:00, P1

Single Molecule Studies of Calix[4]arene-linked Perylene Bisimide Dimers with Spectral and Temporal Resolution — •Abey Issac¹, Dominique Ernst¹, Catharina Hippius², Frank Würthner², and Jürgen Köhler¹ — ¹Experimental Physics IV and Bayreuth Institute für Macromolecular Research (BIMF), University of Bayreuth, 95447 Bayreuth, Germany — ²Institut für Organische Chemie and Röntgen Research Center for Complex Material Systems, Universität Würzburg, 97074 Würzburg, Germany

Initial studies of single calix[4]arene linked perylene bisimide dimers embedded in a polymer matrix revealed changes of the fluorescence intensity between high, medium and the background levels [1]. The change from the highest level to the background is associated with an efficient energy transfer between the two bisimide units. The medium intensity level presumably reflects the photoreduction of one of those units. Here we report about recent experiments where we recorded either the emission spectra or the fluorescence lifetime at different signal levels.

[1] D.Ernst, R.Hildner, C. Hippius, F. Würthner, J. Köhler, Chem.Phys.Lett. 482 (2009) 93