Erlangen 2022 – scientific programme

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MO: Fachverband Molekülphysik

MO 18: High-Resolution Spectroscopy

MO 18.2: Talk

Thursday, March 17, 2022, 15:00–15:15, MO-H5

High-resolution electronic spectroscopy of phthalocyanines in the gas phase — •Florian Schlaghaufer and Alkwin Slenczka — Institut für Physikalische und Theoretische Chemie, Universität Regensburg, 93053 Regensburg, Germany

The spectral shape of the zero-phonon-line in the electronic and Stark spectra of organic molecules such as phthalocyanines [1] and porphine [2] and their clusters with small atoms and molecules (e.g. H₂O, Ar) recorded in superfluid helium nanodroplets is determined by pure molecular contributions and the influence of the helium environment. Since the analysis of such line shapes is not straightforward, corresponding gas phase studies are essential for dissecting helium induced spectral features from molecular rotor fingerprints.

This talk will give an overview of our recent experimental proceedings on spectroscopy of jet cooled phthalocyanines as well as data analysis used to obtain information on structure and polarity of the molecular systems for both the ground and the electronically excited state. To our best knowledge phthalocyanine is the largest molecule ever studied with respect to its rotational degrees of freedom so far.

Ultimately, this project heads for a better understanding of microsolvation and the dynamics of electronic excitation of molecules inside superfluid helium nanodroplets via combined gas phase and helium droplet investigations.

[1] J. Chem. Phys. 2018, 148, 144301.

[2] J. Chem. Phys. 2018, 149, 244306.