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Erlangen 2022 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 18: High-Resolution Spectroscopy

MO 18.3: Vortrag

Donnerstag, 17. März 2022, 15:15–15:30, MO-H5

Vibronic couplings in Serotonin — •Christian Brand1,2 and Michael Schmitt11Heinrich-Heine University, Institute of Physical Chemistry I — 2German Aerospace Center, Institute of Quantum Technologies

We discuss vibronic couplings between the lowest two excited singlet states (La and Lb) of the neurotransmitter serotonin. In this derivative of indole, we expect a large energy gap between the two states of ≈ 3300 cm−1 and thus only weak couplings. Nevertheless, using rotationally resolved electronic spectroscopy, we observe a mode-dependent rotation of the Lb transition dipole moment vector in the direction of the La. This study bridges the gap between strong and completely suppressed couplings, as previously observed for other indole derivatives.

[1] C. Brand and M. Schmitt, J. Mol. Struct. 1250, 131819 (2022)

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