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Hannover 2010 – scientific programme

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MO: Fachverband Molekülphysik

MO 1: Electronic spectroscopy I

MO 1.2: Talk

Monday, March 8, 2010, 14:30–14:45, F 102

High resolution spectroscopy of 5-methoxyindole — •Christian Brand, Olivia Oeltermann, and Michael Schmitt — Heinrich-Heine-Universität Düsseldorf, Institut für Physikalische Chemie

The laser induced fluorescence spectra of the electronic origin of 5-methoxyindole at 33121 cm−1 and six additional spectroscopic features up to 1000 cm−1 above the origin were recorded with rotational resolution. By comparison to the results of ab initio calculations, the origin of the trans- and the cis-conformers could be identified, the latter lying 975 cm−1 higher in energy. In several vibrational bands of the trans-conformer a splitting of the rovibronic line structure is observed, which may be attributed to the influence of the methoxygroup. All features could be assigned to the 1Lb electronic state and no evidence for a vibrational induced state mixing to the 1La could be found as e.g. in indole or in tryptamine.

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