Freiburg 2024 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 15: Spectroscopy of Metal Clusters
MO 15.4: Vortrag
Mittwoch, 13. März 2024, 15:30–15:45, HS 3042
Electronic structure of reactive transition metal-oxygen cations — •Mayara da Silva Santos1,2, Robert Medel3, Simon Kruse2,4, Max Flach1,2, Olesya S. Ablyasova1,2, Martin Timm2, Bernd von Issendorff1, Konstantin Hirsch2, Vicente Zamudio-Bayer2, Tony Stüker3, Sebastian Riedel3, and Tobias Lau1,2 — 1Universität Freiburg, Freiburg, Germany — 2Helmholtz-Zentrum Berlin, Berlin, Germany — 3Freie Universität Berlin, Berlin, Germany — 4Humboldt-Universität zu Berlin, Berlin, Germany
Discovering compounds that present transition metals with unusual oxidation states or reactive oxygen species (superoxide, peroxide and oxygen-centered radical) is of great scientific and technological interests, as they have key applications as oxidizing agents, catalysts, or reaction intermediates. Here, we use X-ray absorption spectroscopy (XAS) at the oxygen K and metal M3 or N3 edges of gas-phase [MOn]+ systems (M = transition metal, n = integer), in their ground state, to identify the spectroscopic signatures of oxygen ligands and assign the oxidation state of the metal.[1,2] Experiments were performed at the cryogenic ion trap endstation at the beamline UE52-PGM at the Berlin synchrotron radiation facility BESSY II.[3] The highly oxidized and reactive [RhVIIO3]+, [RuVIIIO4]• + and [ReVIIO4]• • + are here investigated via XAS for the first time. References: [1] M. da S. Santos, et al., Angew. Chem. Int. Ed. 61, e202207688 (2022); [2] M. da S. Santos, et al., ChemPhysChem 24, e202300390 (2023); [3] K. Hirsch, et al., J. Phys. B: At., Mol. Opt. Phys. 42, 154029 (2009).
Keywords: X-ray absorption spectroscopy; Transition metal oxide cations; Oxidation state; Oxygen-centered radical