Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 54: Organic Molecules on Inorganic Substrates III: Magnetism, Doping and Interfaces
O 54.3: Vortrag
Mittwoch, 3. April 2019, 11:00–11:15, H24
Study of 12-Metallacrowns-4 Complexes — •Robert Ranecki1, Swen Ehnert1, Benedikt Baumann1, Yaroslav Pavlyukh1, Georg Lefkidis1, Wolfgang Hubner1, Angeliki Athanasopoulou2, Eva Rentschler2, Stefan Lach1, and Christiane Ziegler1 — 1Department of Physics, TU Kaiserslautern, Erwin-Schroedinger-Strasse 46, 67663 Kaiserslautern — 2Institute of inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz
Organometalic multi spin centers and the orientation of the resulting molecular spin moment break new ground for future applications. In this context, the metallacrown complexes (MC) represent an exceptional class of coordination compounds. In most cases MCs decompose by thermal evaporation which is typically used for ultra-high vacuum preparation. Here, we present the perperation of the 12-MC-4 complex (HNEt3)2[CuCu4(shi)4 on different substrates by e-spray, avoiding a defragmentation of the molecules. Using state-of-the-art quantum-chemistry (beyond the Goodenough-Kanamori rules) enables us to identify the spin split d-states for in situ prepared CuCu4 MC and the electronic molecular structure by photoelectron spectroscopy.For observing metal substrate induced collective spin phenomena we use the hybrid system CuCu4/Cu(100). STM/STS investigations show electronic properties and the adsorption orientation of the CuCu4 molecules related to the lattice of Cu(100).