Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 32: Poster Tuesday: Adsorption and Catalysis 1
O 32.3: Poster
Dienstag, 6. September 2022, 11:00–13:00, P3
On-surface Synthesis of Naphthalocyanines with Extended π-Systems — •Lukas J. Heuplick1, Qitang Fan1, Dmitriy A. Astvatsaturov2, Dennis Körmer1, Tatiana V. Dubinina2, and J. Michael Gottfried1 — 1Fachbereich Chemie, Philipps-Universität Marburg, Marburg, Germany — 2Moscow
The distinct optical and electronic properties of phthalocyanines (Pc) make them interesting in a wide field of applications. Here we report the on-surface synthesis of new naphthalocyanines with differently extended π-systems. This reaction in form of a cyclization is studied for different dicarbonitriles on the Ag(111) and Au(111) surfaces by scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS). 6,7-Diphenyl-2,3-naphthalenedicarbonitrile (DPNDN) forms naphthalocyanines only with co-adsorbed Fe atoms on Ag(111) and Au(111). The larger 6,7-di(2-naphthyl)-2,3-naphthalenedicarbonitrile (DNNDN) can undergo this reaction directly on Ag(111) without co-adsorbed metal, resulting in the corresponding Ag-NPc.