Rostock 2019 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 18: Posters 2: Time Resolved Spectroscopy

MO 18.16: Poster

Mittwoch, 13. März 2019, 16:15–18:15, S Foyer LLM

Ultrafast 2D-Vis spectroelectrochemistry — •Julia Heitmüller, Klaus Eckstein, Pascal Kunkel, Tobias Brixner, and Tobias Hertel — Institut für Physikalische und Theoretische 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 is used to generate different oxidized and reduced molecular species in solution. Our goal is the combination of these two techniques leading to coherent 2D spectroelectrochemistry. For the infrared regime different spectroelectrochemical cells were described and used for 2D measurements in the literature [1,2]. We developed a prototype for the visible regime to investigate UV/Vis-induced photophysics or photochemical reactions depending on oxidation state. We verified that our design works, by using redox standards and laser dyes. First time-resolved measurements were performed by integrating the cell in transient absorption experiments. In the next step we will approach 2D spectroscopy and observe molecules in different redox states, that are generated in situ without adding 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)