Journal
COORDINATION CHEMISTRY REVIEWS
Volume 253, Issue 19-20, Pages 2387-2398Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ccr.2009.01.024
Keywords
Scanning tunneling microscopy; Current-imaging tunneling spectroscopy; Scanning tunneling spectroscopy; Single-molecule magnets; Grid-like and star-like supramolecular assemblies
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Funding
- DFG [1137]
- SFB [583]
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We have investigated a series of magnetic supramolecular complexes involving coordinated metal ions. Using the current-imaging tunneling spectroscopy mode of a STM, we mapped isolated single molecules. By comparing with DFT calculations, we confirmed that the weakest bonds, i.e. the supramolecular coordination interactions, dominate the molecular orbitals near the Fermi-level of the molecule. Thus, STM spectroscopy can address directly the metal centers in a rather complex molecular entity. Our method allows a selective mapping of the functional units within the supramolecular architecture, even if these units are embedded into a complex set of organic ligands. We observed this behavior in all of our investigated molecules. (C) 2009 Elsevier B.V. All rights reserved.
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