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O: Fachverband Oberflächenphysik

O 29: Poster: 2D Materials

O 29.3: Poster

Dienstag, 19. März 2024, 12:30–14:30, Poster A

2D porous fantrip network on calcite (10.4) as a starting point for on-surface synthesis — •Lea Klausfering¹, Lukas Höltkemeier¹, Ralf Bechstein¹, Markus Lackinger², and Angelika Kühnle¹ — ¹Physical Chemistry I, Bielefeld University, 33615 Bielefeld, Germany — ²Deutsches Museum, 80538 Munich, Germany

Triptycen anthracene derivatives have proven to be suitable molecules for two-dimensional polymers. For example the deposition on crystal surfaces under ultra-high vacuum (UHV) conditions is possible. Under UHV conditions, the fluorinated anthracene triptycene (fantrip) molecule was investigated on graphite (0001) [1] and Au (111) [2] surfaces. However, in both cases, a porous Fantrip network could only be obtained when passivating the surface prior to molecule deposition. Otherwise, the molecules did not lie perpendicular with all three anthracene blades with respect to the surface as desired, but parallel with two anthracene blades and upright with one anthracene blade. The passivation reduces the molecule-surface interaction. Here, we show that the porous fantrip network can be achieved without surface passivation when using the (10.4) surface of the bulk insulator calcite. The resulting network provides a good starting point for [4+4]-photocycloaddition on the surface to generate a two-dimensional polymer.

[1] L. Grossmann et al., Nature Chemistry, 2021, 13, 730-736.

[2] L. Grossmann et al., Angew. Chem. Int. Ed., 2022, 134, e202201044.

Keywords: 2D network; AFM; self-assembly