Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 18: Poster: Transport and Spectroscopy in Molecular Nanostructures (Intersectional Session with MO)
CPP 18.5: Poster
Dienstag, 15. März 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