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MO: Fachverband Molekülphysik
MO 9: Femtosecond Spectroscopy I
MO 9.1: Vortrag
Mittwoch, 11. März 2020, 11:00–11:15, f102
Ultrafast 2D-Vis spectroelectrochemistry — •Julia Heitmüller1, Klaus Eckstein1, Pascal Kunkel1, Karl Thorley2, Rebecca Renner2, Tobias Hertel1, Frank Würthner2 und Tobias Brixner1 — 1Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
Coherent 2D spectroscopy is a well established method to investigate dynamic processes with femtosecond time resolution and to observe couplings between different energetic states. Electrochemistry, on the other hand, can be used to generate different oxidized and reduced molecular species in solution. The combination of these two techniques leads to coherent 2D spectroelectrochemistry. For the infrared regime different spectroelectrochemical cells were described and used for 2D measurements in the literature [1,2], but not so far for the visible. We developed a setup using a commercial electrochemical cell (HX-301, Hokuto Denko), which we modified for the experimental requirements. As a model system we investigate a tetraphenoxyperylene bisimide and obtain 2D as well as other spectroscopic measurements of the different redox states in situ without requiring oxidizing or reducing agents.
[1] Y. El Khoury, et al., Rev. Sci. Instrum. 86, 083102 (2015)
[2] D. Lotti, et al., J. Phys. Chem. C, 120, 2883 (2016)