Hannover 2010 – scientific programme

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MO: Fachverband Molekülphysik

MO 1: Electronic spectroscopy I

MO 1.3: Talk

Monday, March 8, 2010, 14:45–15:00, F 102

Rotationally resolved electronic spectroscopy of Tetrahydrocarbazole — •Olivia Oeltermann, Christian Brand, and Michael Schmitt — Heinrich-Heine-Universität, Düsseldorf, Institut für Physikalische Chemie

The rotationally resolved LIF spectra of the electronic origin and several vibrational bands of 1,2,3,4-Tetrahydrocarbazole have been measured to determine structural parameters in the ground and electronically excited state. The fits of the rotational constants in the ground and first electronically excited state have been performed using a genetic alogorithm and evolutionary strategies. The intermolecular structures are fit to the inertial parameters and are compared to the results of ab initio calculations for both states. The study of 1,2,3,4-Tetrahydrocarbazole is of special interest for the investigation of the lowest excited singlet L_a and L_b states in heterocyclic aromatic molecules, since e.g. 2,3-Dimethylindole exhibits the smallest L_a/L_b energy gap of all substituted indoles.