Berlin 2018 – scientific programme

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O: Fachverband Oberflächenphysik

O 81: Poster Focus Session: Molecular Nanostructures on Surfaces - New Concepts towards Complex Architectures

O 81.1: Poster

Wednesday, March 14, 2018, 18:15–20:30, Poster A

On-Surface Metalation of Corrole Ligands — •Jan Herritsch, Malte Zugermeier, Min Chen, Qitang Fan, Martin Schmid, and J. Michael Gottfried — Fachbereich Chemie, Philipps-Universität Marburg, Germany

The surface coordination chemistry of porphyrinoid transition metal complexes plays an important role in interface functionalization. Variation of the ligand skeletal structure offers the possibility to tune and control the reactivity. Corroles can be described as contracted porphyrins, which however differ in their electronic structure and can act as formally trianionic ligands. We have studied the characteristics of mono- and submonolayers of a free-base alkyl substituted corrole ligand system on the Ag(111) and the Cu(111) surface. Furthermore, we present two different ways for the on-surface syntheses of transition metal corrole complexes. On the one hand we were able to show the synthesis of cobalt corrole on the Ag(111) surface through metalation of a ligand monolayer by postdeposition of the corresponding metal. As a second route we studied the thermally controlled self-metalation of corrole with substrate atoms on the Cu(111) surface yielding a copper corrole complex. The reactions were investigated by XPS, UPS and STM studies and compared to a similar porphyrin as a reference system. DFT calculations were performed to obtain additional insight and to interpret the spectra.