Osnabrück 2002 – scientific programme
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MS: Massenspektrometrie
MS 7: Moleküle, Cluster, Zerfälle und Reaktionen
MS 7.5: Talk
Friday, March 8, 2002, 15:00–15:15, HS 02/E04
Black Body Radiation Induced Hydrogen Formation in Hydrated Vanadium Cations V+(H2O)n — •O. Petru Balaj, Brigitte S. Fox, Iulia Balteanu, Martin K. Beyer, and Vladimir E. Bondybey — Institut für Physikalische und Theoretische Chemie, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching
Hydrated vanadium cations V+(H2O)n, n=5−30, are stored in the collision-free environment of an FT-ICR mass spectrometer and their reactions are studied under the influence of black body radiation. Besides loss of water, the clusters show two different intracluster reactions, whose branching ratios are strongly size-dependent: formation of V(OH)+(H2O)n with vanadium in the more common oxidation state +II and simultanous evaporation of atomic hydrogen and formation of V(OH)2+(H2O)n with vanadium in the also common oxidation state +III and simultaneous evaporation of molecular hydrogen. This behaviour is different to the recently studied intracluster reactions of hydrated monovalent main group metals Mg+ and Al+ which only react to their preferred oxidation state, MgOH+ and Al(OH)2+, respectively, and reflects the ability of the transition metal vanadium to form stable compounds in various oxidation states.