Heidelberg 2015 – scientific programme
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MO: Fachverband Molekülphysik
MO 22: Femtosecond Spectroscopy 3
MO 22.1: Talk
Friday, March 27, 2015, 11:00–11:15, PH/HS1
Effects of Conjugation on Molecular Dynamics — •Federico Koch1, André Zitzler-Kunkel2, Cristina Consani1, Frank Würthner2, and Tobias Brixner1 — 1Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg — 2Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg
Interactions of chromophores and formation of excitons play a fundamental role in understanding the dynamics of molecules ranging from small molecular systems up to complex systems such as polymers and aggregates. To better understand these interactions a series of merocyanine dyes directly linked via a bridge was synthesized. This molecular series allows the comparison between interactions through space and interaction mediated by the bridge.
The differences in the absorption maxima and band splitting can in principle be explained by a vibrational progression or a weak excitonic coupling. To investigate this we use transient absorption and compare the relaxation dynamics after excitation. Furthermore, we aim to directly visualize chromophore interaction by using polarization-dependent measurements and coherent 2D spectroscopy.