Rostock 2019 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 6: Metal Complexes
MO 6.1: Hauptvortrag
Montag, 11. März 2019, 14:00–14:30, S HS 001 Biologie
Investigation of structures and electronic states of transition metal containing complexes via transient FTIR spectroscopy — Patrick Di Martino-Fumo1, Pit Boden1, Jasmin Busch2, Sven Otto3, Katja Heinze3, Stefan Bräse2, and •Markus Gerhards1 — 1Physical Chemistry, TU Kaiserslautern, Germany — 2Organic Chemistry, KIT, Germany — 3Inorganic Chemistry and Analytical Chemistry, JGU Mainz, Germany
In order to analyze structures, electronic properties and lifetimes of transition metal complexes in their electronically excited states transient step-scan FTIR spectroscopy in the nanosecond and microsecond regime turns out to be a very efficient tool. We combine transient FTIR-spectroscopy with powerful tunable ns laser systems from the IR to the UV at different repetition rates which are used for specific electronic excitations. For investigation of temperature dependent effects samples can be cooled down to about 10 K. Furthermore different samples (solution, pellets, films) offer the possibility to analyze e.g. the influence of environment, aggregation state or electronic properties. The presented molecular systems include a series of bi- and tetranuclear Cu(I)-complexes relevant for the development of Iridium free OLEDs. Additionally Cr3+-containing complexes are mentioned which are efficient NIR emitters. Here newly developed double resonance techniques are presented, which are applied to specifically influence the relative population of two energetically similar electronically excited states.