Heidelberg 2015 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 7: Ion Traps, Molecules, Clusters, Decay and Reactions

MO 7.5: Vortrag

Dienstag, 24. März 2015, 12:15–12:30, PH/HS2

Cryo kinetics of size selected cobalt clusters — •Jennifer Mohrbach, Sebastian Dillinger, and Gereon Niedner-Schatteburg — Fachbereich Chemie and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany

A customized Fourier Transform Ion Cyclotron Resonance (FT-ICR) mass spectrometer served to investigate the kinetics of nitrogen adsorption on size selected cobalt cluster cations (Co_n⁺, 9 < n < 29) at well-defined cryo temperatures. Our setup combines a hexapol ion trap for kinetic studies with a FT-ICR cell for Infrared Multiple Photon Dissociation (IRMPD) studies and mass analysis. Both ion traps are cryogenically cooled to temperatures below 30 K. We have conducted kinetic studies to determine the rates and numbers of the N₂ adsorption to the respective cobalt clusters. Furthermore we have performed IR(M)PD spectroscopy in the N-N stretching frequency range of the adsorbed nitrogen to gain insight into its binding motifs on the cluster and the structure of the cobalt clusters themselves.