Rostock 2019 – scientific programme

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MO: Fachverband Molekülphysik

MO 21: Coupled Systems

MO 21.3: Talk

Thursday, March 14, 2019, 14:45–15:00, S HS 001 Biologie

Franck Condon spectra of the 3-tolunitrile dimer — •Christian Henrichs and Michael Schmitt — Institute for Physical Chemistry I, Heinrich-Heine-University, Düsseldorf

The 3-tolunitrile (3-TN) dimer is an example for the class of centrosymmetric homodimers. The investigation of the structure of dimers has been of certain interest with respect to excitonic effects. Therefore, we have to face the question if the homodimer forms J-aggregates or H-aggregates. But not only the structure, but also the question of electronic excitation of the two equivalent chromophores might be interesting. The question is, if the electronic excitation is localized on one of the chromophores, or delocalized over the both. To adress these two problems we performed Franck-Condon Fits of the fluorescence emission spectra of the 3-TN dimer and determined the change of the geometry upon electronic excitation via a Franck-Condon fit.