Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 45: Organic-Inorganic Hybrid Systems and Organic Films
O 45.17: Poster
Dienstag, 21. März 2017, 18:30–20:30, P1A
On-Surface Synthesis of Naphthalocyanine and Corrole Complexes — •Malte Zugermeier1, Min Chen1, Lukas Heuplick1, Martin Liebold1, Nicolas Bock1, Falk Niefind1, Lukas Ruppenthal1, Martin Schmid1, Peter Schweyen2, Martin Bröring2, Jörg Sundermeyer1, and J. Michael Gottfried1 — 1Fachbereich Chemie, Philipps-Universität Marburg, Germany — 2Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Germany
Tetrapyrrole macrocycles are important examples of biomimetic systems that found the way into real-life applications. Porphyrins possess interesting catalytic and optoelectronic properties. The usage of their metal complexes for surface functionalization can benefit from oxidation state tuning of the metal center to control its chemical and electronic properties. This is possible with axial ligands or modifications of the equatorial tetrapyrrole ligand. In contrast to porphyrins, adsorbed corroles can oxidize metal atoms to their +III oxidation state. For detailed insight into this surface coordination reaction, we studied mono- and multilayers of an octa-alkyl corrole and their reaction with transition metals by XPS, UPS, NEXAFS and STM. Furthermore, we report the on-surface synthesis of the closely to porphyrins and corroles related, artificial naphthalocyanines on Ag(111) by tetramerization of dicarbonitriles in the presence of iron. STM and XPS studies reveal that pre-reaction dicarbonitrile forms organometallic structures with the Fe atoms, whereas the post-reaction layer consists of iron naphthalocyanine complexes.