Erlangen 2022 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 9: Femtosecond Spectroscopy II
MO 9.1: Vortrag
Mittwoch, 16. März 2022, 10:30–10:45, MO-H5
Direct Comparison of Molecular-Beam versus Liquid-Phase Pump–Probe and Two-Dimensional Spectroscopy on the Example of Azulene — •Hans-Peter Solowan1, Pavel Malý1,2, and Tobias Brixner1 — 1Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg — 2Faculty of Mathematics and Physics, Charles University, Prague, Ke Karlovu 5, 121 16 Praha 2, Czech Republic
With mass-resolved ion detection, we have introduced cations as a new observable in coherent two-dimensional (2D) spectroscopy [1]. Here we present new results of molecular-beam coherent 2D electronic spectroscopy on the example of azulene. We directly compare these gas-phase with liquid-phase measurements of azulene dissolved in cyclohexane. Both schemes probe the same Liouville-space pathway from S0 to S2. Furthermore we show the S1 excitation dynamics of azulene obtained by pump–probe measurements in both phases and discuss results with respect to a passage through a conical intersection between azulene’s S1 and S0 state. The comparison allows us to isolate the influence of the environment of the molecule on its excited-state dynamics.
[1] S. Roeding and T. Brixner, Nat. Commun. 9, 2519 (2018)