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Tripodal MIII Complexes on Au(111) Surfaces: Towards Molecular “Lunar Modules”

Authors

  • Alexandrina Schramm,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany
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  • Christophe Stroh,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany
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  • Kerrin Dössel,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany
    2. DFG Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), 76049 Karlsruhe, Germany
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  • Maya Lukas,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany
    2. DFG Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), 76049 Karlsruhe, Germany
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  • Matthias Fischer,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany
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  • Frank Schramm,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany
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  • Olaf Fuhr,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany
    2. DFG Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), 76049 Karlsruhe, Germany
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  • Hilbert v. Löhneysen,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany
    2. DFG Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), 76049 Karlsruhe, Germany
    3. Physics Institute and Institute of Solid State Physics, Karlsruhe Institute of Technology (KIT), 76049 Karlsruhe, Germany
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  • Marcel Mayor

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany
    2. DFG Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT), 76049 Karlsruhe, Germany
    3. Department of Chemistry, University of Basel, Switzerland, Fax: +41-61-267-1016
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Abstract

A series of tripodal MIII complexes (M = Ga, Mn, Fe) functionalized with three methylsulfanyl end-groups for deposition on Au(111) were synthesized. The structures were designed to build rigid three-dimensional molecular structures that stand on their own with multiple attachments on the metallic surface. The coordination compounds are based on a trensal [(tris(2,2′,2"-salicylideneimino)triethylamine)] Schiff base ligand which provides stable metal complexes. The molecular structures of GaIII, FeIII, and MnIII complexes were determined by single-crystal X-ray diffraction crystallography. Magnetic properties depend on the coordinated metal ion and vary from a diamagnetic GaIII complex to paramagnetic high-spin FeIII and MnIII complexes. A submonolayer of the GaIII complex deposited on Au(111) was studied in a preliminary ultra-high-vacuum scanning tunneling microscopy (UHV-STM) investigation.

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