Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 37: Laser applications: Spectroscopy
Q 37.3: Vortrag
Mittwoch, 20. März 2013, 14:30–14:45, F 142
Femtosecond characterization of an easily accesible charge transfer system — •Torben Villnow1, Gerald Ryseck1, Sarah Bay2, Vidisha Rai-Constapel3, Thomas J.J. Müller2, and Peter Gilch1 — 1HHU Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf, AG Femtosekundenspektroskopie — 2LS Prof. Dr. T.J.J. Müller — 3LS Prof. Dr. C. Marian
With regard to applications in (organic) photovoltaics numerous intramolecular donor-acceptor systems have been synthesized and characterized. The D-A system (sb078) studied here consists of a phenothiazine donor and anthrachinone acceptor moiety. The moieties are linked by an α-aminoacylamide bridge. Linkage relies on an Ugi-reaction which renders sb078 and related compounds easily synthetically accessible. Electron transfer properties of sb078 have been characterized by means of femtosecond transient absorption spectroscopy. Strong evidence for the very rapid formation of a charge separated state originating from the excited singlet and triplet state of anthrachinone is observed. Even though the singlet dominated charge separated state rapidly decays, the triplet phased state persist for more than 3 ns (range limited by the set-up).