Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: Nanoparticles II
CPP 9.10: Vortrag
Montag, 23. März 2009, 16:30–16:45, ZEU 114
STM/CITS investigation of a Co(II) Cubane and a Zn(II) Coordination Polymer — •Michael Stocker1, Utpal Mitra1, Viacheslav Dremov1, Nina Fischer2, Frank W. Heineman2, Andreas Scheurer2, Ayuk M. Ako2, Nicolai Burzlaff2, Rolf W. Saalfrank2, and Paul Müller1 — 1Department für Physik, Universität Erlangen-Nürnberg, Germany — 2Department für Chemie und Pharmazie, Universität Erlangen-Nürnberg, Germany
A combination of scanning tunneling microscopy (STM) and current imaging tunneling spectroscopy (CITS) has been performed on a Zn(II) coordination polymer ([Zn(L)(Cl)]n) and on a Co(II) cubane ([Co4(HL)4(Cl)4]). Both were deposited onto highly oriented pyrolytic graphite (HOPG). In the case of the Zn(II) coordination polymer thick strands as well as single polymer lines were observed. For the Co(II) cubane single molecules were observed. In CITS measurements we found a rather large contrast at the expected location of the Zn and Co metal centers, respectively. This demonstrates that the position of the metal centers within the molecule can be mapped. We discuss local tunneling spectroscopy data.