Frankfurt 2006 – scientific programme
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MS: Massenspektrometrie
MS 9: Posterbeiträge
MS 9.12: Poster
Thursday, March 16, 2006, 16:30–18:30, Labsaal
Laser induced desorption of organometallic molecules from metallic and insulating surfaces monitored via time-of-flight mass spectrometry — •Mihai Vaida1,2, Tobias Gleitsmann1,2, Ludger Wöste1, and Thorsten M. Bernhardt2 — 1Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin — 2Abteilung Oberflächenchemie und Katalyse, Universität Ulm, 89069 Ulm
Time-of-flight mass spectrometry is employed to monitor the laser induced desorption of organic molecules and organometallic complexes from solid surfaces in a UHV setup. The molecules, in particular cyclopentadienyl manganese tricarbonyl (cymantrene) CpMn(CO)3, are deposited by means of a pulsed valve either to a metallic Mo(100) surface or to an insulating surface that consists of Mo(100) covered by a few monolayers of magnesium oxide. Surface characterization prior to the laser desorption experiments is performed by thermal desorption spectroscopy (TDS), Auger electron spectroscopy (AES), and low energy electron diffraction (LEED). First results on photo-dissociation of CpMn(CO)3 molecules and fragment desorption will be presented in conjunction with a comparison between the light induced dissociation of free and supported CpMn(CO)3 molecules.