Hannover 2013 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 14: Poster 1: Cluster, Femtosecond Spectroscopy

MO 14.17: Poster

Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof

Similarities and Differences in the Optical Response of Perylene-based Hetero-bichromophores and Their Monomeric Units — •Patrick Nuernberger¹, Ulrike Selig¹, Volker Dehm², Volker Settels¹, Marcel Gsänger², Bernd Engels¹, Frank Würthner², and Tobias Brixner¹ — ¹Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — ²Institut für Organische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany

The linear and nonlinear optical response of molecular hetero-dimers and the composing perylene units is explored with fluorometry, steady-state and transient absorption, and coherent two-dimensional electronic spectroscopy. Supported by a Förster theory approach and ab-initio calculations, we disclose the photoinduced dynamics comprising excitonic coupling, conformational changes, charge transfer, and relaxation dynamics. The influence of the actual orientation of the two chromophore units on these processes is investigated by employing two bichromophores built of the same monomeric units but linked differently.