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 ¹L_b electronic state and no evidence for a vibrational induced state mixing to the ¹L_a could be found as e.g. in indole or in tryptamine.