Structures of Medium-Sized Ruthenium Clusters: The Octahedral Motif

Authors

  • Eugen Waldt,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany)
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  • Prof. Dr. Reinhart Ahlrichs,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany)
    2. Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany)
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  • Prof. Dr. Manfred M. Kappes,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany)
    2. Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany)
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  • Dr. Detlef Schooss

    Corresponding author
    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany)
    2. Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany)
    • Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany)

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Abstract

We describe the first direct structural characterization of medium-sized ruthenium clusters (Ru19, Ru28, Ru38, and Ru44) by using a combination of trapped ion electron diffraction and density functional theory. We find close-packed structures based on octahedral geometries: Ru19 and Ru44 are closed-shell octahedra whereas Ru28 is a double octahedron. In the case of Ru38, instead of a truncated octahedron we obtain evidence for lower symmetry structures containing a reentrant surface.

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