Erlangen 2018 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 17: Posters 2: Cold Molecules and Clusters
MO 17.9: Poster
Mittwoch, 7. März 2018, 16:15–18:15, Orangerie
Cryo IR Spetroscopy of N2 and H2 on Ru8+ — Sebastian Dillinger1, Matthias P. Klein1, •Annika Steiner1, David C. McDonald II2, Michael A. Duncan2, Manfred M. Kappes3, and Gereon Niedner-Schatteburg1 — 1Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — 2Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA — 3Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
We present the cryo IR spectra of [Ru8(H2)l]+ l = 1 - 8, [Ru8(N2)m]+ m = 1 - 8, and the coadsorbed [Ru8(H2)1(N2)4]+ and [Ru8(N2)4(H2)1]+ species in isolation. The [Ru8(H2)l]+ species with l > 1 reveal bands in the region of 1800 cm-1 to 1880 cm-1, which are a strong evidence for the formation of a hydride species. The [Ru8(N2)m]+ species reveal features redshifted to the free N2 vibration (2300 cm-1) in the region of 2190 to 2300 cm-1, which are attributed to the vibration of head on adsorbed N2. The H2-N2-coadsorbates [Ru8(H2)1(N2)4]+ and [Ru8(N2)4(H2)1]+ species reveal spectral differences in the hydride region of the IR spectra. We interpret these differences to different positioning of the hydrides on the Ru cluster. This positioning is influenced by the sequence of adsorption (first H2 and then N2 or first N2 and then H2) and the possibility of migration of the hydrides on the Ru8+ cluster.