Hannover 2013 – scientific programme

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MO: Fachverband Molekülphysik

MO 26: Electronic Spectroscopy II

MO 26.4: Talk

Thursday, March 21, 2013, 14:45–15:00, F 107

Manipulation of electronically excited states of indole — •Christian Brand, Martin Wilke, Josefin Rolf, and Michael Schmitt — Heinrich-Heine-Universität, Institut für Physikalische Chemie I, Düsseldorf

The electronic origins of several singly substituted indole derivatives were investigated with rotationally resolved electronic spectroscopy. From the experimentally determined transition dipole moment orientation in combination with high level ab initio calculations the nature of the respective states was elaborated. It could be shown that a substituent at the biologically important position 5 at the indole chromophore has a pronounced influence on the photophysics of indole. Comparing the influence of substituents with different characteristics to each other yields that mesomeric effects have a greater impact on the energetic position of the excited states than inductive effects. Recently, these investigations were expanded to other positions at the chromophore. A thorough understanding of these influences may allow for a systematic manipulation of the electronically excited states.