Regensburg 2019 – wissenschaftliches Programm
O 30.5: Vortrag
Dienstag, 2. April 2019, 11:30–11:45, H37
Coordination-induced spin-state switching of a Ni complex on Ag(111) — •Manuel Gruber1, Alexander Köbke1, Florian Gutzeit2, Rainer Herges2, and Richard Berndt1 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, Germany — 2Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, Germany
The spin state of a transition-metal complexes (TMC) can be controlled by changing its coordination state. For TMC on surfaces, this was so far realized by adding/removing gaseous molecules  or by transferring a ligand (e.g. Cl) with the tip of a scanning tunneling microscope (STM) . Alternatively, a switching unit within the TMCs itself may be employed to change the coordination state of the complex , but so far the interaction with the substrate was detrimental for the molecular structure and switching properties .
In the present study, we have designed and investigated robust Ni complexes, which can intrinsically switch their coordination state. Combining low-temperature scanning tunneling microscopy, near-edge x-ray absorption spectroscopy along with density functional theory calculations, we evidence the switching of these complexes on Ag(111) between the S=0 and S=1 spin states.
This work was supported by the DFG through SFB 677 and the European Union’s Horizon 2020 programme (No. 766726).  Gopakumar et al., J. Am. Chem. Soc. 134, 11844 (2012)  Wäckerlin et al., Adv. Mater. 25, 2404 (2013)  Venkataramani et al., Science 331, 445 (2011)  Matino et al., Chem. Commun. 46, 6780 (2010)