Heidelberg 2015 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 16: Posters 3: Novelties in Molecular Physics
MO 16.2: Poster
Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer
Investigation of the photophysical properties and metal-metal-interactions in mono-, bi- and trinuclear Au complexes — •Anneken Grün1, Fabian Dietrich1, Simon Walg2, Merve Cayir2, Jessica Rahn1, Werner Thiel2, and Markus Gerhards1 — 1TU Kaiserslautern, Fachbereich Chemie, Physikalische und Theo-retische Chemie, Erwin-Schrödinger-Str. 52, 67663 Kaiserslautern, Germany — 2TU Kaiserslautern, Fachbereich Chemie, Anorganische Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
Au complexes such as bispyrimidinylpyridine-(NH(CH2)2PPh2)2 [AuCl]2-(H) are of great interest in synthesis due to their catalytical activity e.g. for hydroarylation and hydroamination. We investigate structurally similar mono-, bi- and trinuclear Au complexes in solution to understand their photophysical behavior which is probably induced by cooperative effects. The ground state and electronically excited states are analyzed by the application of UV/Vis- and fluorescence spectroscopy as well as the time correlated single photon counting (TCSPC) technique to determine the lifetime of the excited states. Measurements of the metal free ligands are compared to the spectra of the complexes as well as time dependent density functional theory (TD-DFT) calculations are performed to explain the photophysical properties and the effects of metal-metal interactions. The influence of interactions resulting from one or two gold atoms as well as the impact of an additional zinc center on the emission spectra is discussed.