Heidelberg 2015 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 16: Posters 3: Novelties in Molecular Physics
MO 16.3: Poster
Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer
Ultrafast photochemistry of a carbonyl-nitrosyl molybdenum complex — •Johannes Knorr1, Sebastian Schott2, Jarno Riefer2, Christoph Nagel3, Ulrich Schatzschneider3, and Patrick Nuernberger1 — 1Physikalische Chemie II, Ruhr-Universität Bochum, 44780 Bochum — 2Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 3Institut für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
Transition-metal complexes capable of releasing small molecular messengers upon photoactivation are promising sources of gasotransmitters such as carbon monoxide (CO) or nitric oxide (NO) in biological applications [1]. Recently, we investigated the photochemistry of a water-soluble manganese tricarbonyl complex using femtosecond spectroscopy combined with DFT-calculations, and found that several electronic transitions in the UV may cause CO loss, but always just one CO-ligand is released on an ultrafast timescale [2]. In this study, we extend this approach to [Mo(CO)2(NO)(py3tacn)]PF6 with py3tacn = tris(2-pyridylmethyl)-1,4,7-triazacyclononane, a molybdenum complex containing both carbonyl and nitrosyl ligands, and explore the photolytic dynamics upon excitation by employing UV-pump/VIS-probe and UV-pump/IR-probe ultrafast spectroscopy. In particular, we are interested in how the photodynamics in mixed carbonyl-nitrosyl compounds differ from systems with only carbonyl ligands.
U. Schatzschneider, Eur. J. Inorg. Chem. 2010, 10, 1451-1467
P. Rudolf et al., J. Phys. Chem. Lett. 2013, 4, 596-602