Erlangen 2018 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 7: High Resolution Spectroscopy

MO 7.4: Vortrag

Montag, 5. März 2018, 17:00–17:15, PA 1.150

Observation of 1,2-, 1,3- and 1,4-dimethoxybenzenes via high resolution laser induced fluorescence Stark spectroscopy — •Marie-Luise Hebestreit, Michael Schneider, Christian Henrichs, and Michael Schmitt — Institute for Physical Chemistry I, Heinrich-Heine-University, Düsseldorf

The different rotamers of 1,2-, 1,3- and 1,4-dimethoxybenzene were investigated using high resolution laser induced fluorescence spectroscopy. The molecular parameters, obtained from fit using a evolutionary strategies were compared to the results of ab initio calculations and used for structural assignment. To investigate the permanent dipole moments moments in the ground and first electronically excited singlet state, a homogeneous field was applied, which lifts the M degeneracy by the Stark effect. The resulting experimental permanent dipole moments were compared to predicted dipole moments via vectorial addition of the anisole dipoles and to the results of ab initio calculations.
Finally, the conformational space of 1,3-dimethoxybenzene is discussed in particular.