Berlin 2014 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 24: Biomolecules 2

MO 24.3: Vortrag

Freitag, 21. März 2014, 14:30–14:45, BEBEL SR144

Two color enhanced IRMPD spectroscopy of mononuclear Ag(I)/Cu(I)-Bispyridine-complexes — •Joachim Hewer, Maximilian Gaffga, Yevgeniy Nosenko, and Gereon Niedner-Schatteburg — Technische Universität Kaiserslautern, Germany

Mass spectrometry and IR spectroscopy in combination enable us to investigate isolated ionic species without interference form solvents, lattices or adsorbates. Utilizing a two laser setup, resonant two color IRMPD (infrared multi photon dissociation) is capable of enhancing fragmentation efficiencies, thus revealing vibrational bands, which may be hardly observable by single color IRMPD.^[1][2] We report studies on a set of mononuclear transition metal complexes [HP-M-AP]⁺ (HP = 2-Hydroxypyridine, 3-Hydroxypyridine; AP = 2-Aminopicoline; M = Ag, Cu), which serve as model systems for intramolecular energy transfer across the metal center. Our investigations elucidate the internal vibrational redistribution (IVR) process as a function of the frequency, intensity and time delay of the applied nanosecond IR pulses. The specific fragmentation behavior provides some insight into vibrational mode couplings beyond ergodicity.
[1] Y. Nosenko, F. Menges and C. Riehn, G. Niedner-Schatteburg, PCCP, 2013, 8171-8178.
[2] M. Gaffga, J.I. Lang, F. Menges, K. Muller, W. Thiel, G. Niedner-Schatteburg, 2013, manuscript in preparation.