Erlangen 2018 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 7: High Resolution Spectroscopy

MO 7.1: Vortrag

Montag, 5. März 2018, 16:15–16:30, PA 1.150

Dipole Moments of Anisole in Ground and Excited State via Condensed Phase Thermochromic Spectroscopy and Gas Phase HRLIF Spectroscopy — •Mirko Lindic, Michael Schneider, Marie-Luise Hebestreit, and Michael Schmitt — Institute for Physical Chemistry I, Heinrich-Heine-University, Düsseldorf

The dipole moment of anisole in ground and first excited singlet states was investigated and compared for the gas and the condensed phase. The dipole moments in solution have been determined using the method of thermochromic shifts of the fluorescence emission and absorption spectra. To test the validity of the method the simple model molecule anisole was measured with temperature dependent UV/Vis-absorption and fluorescence spectroscopy. Contrary to previous studies, the solvent cavity volume was determined experimentally via concentration dependent density measurements. To create exact values for comparison with those from the condensed phase high resolution laser induced fluorescence Stark spectra have been measured in order to reliably determine the excited state dipole moments for a direct comparison. A critical survey about the method will be given.