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O: Fachverband Oberflächenphysik

O 69: Nanostructures at Surfaces II

O 69.9: Vortrag

Mittwoch, 19. März 2025, 17:00–17:15, H25

Atomic size effects in 1D metal-coordination polymers on silver — •Pengfei Zhao¹, Hongxiang Xu^1,3, Joachim Reichert¹, Anthoula C. Papageorgiou^1,2, and Johannes V. Barth¹ — ¹Technical University of Munich, Germany — ²National and Kapodistrian University of Athens, Greece — ³Peking University, China

Supramolecular coordination on solid surfaces provides a versatile approach to synthesize one-dimensional metal coordination polymers (1D-CPs), where the atomic size of metals plays a crucial role in determining the final structures and properties. Here, we systematically investigate 1H,1’H-2,2’-bibenzo[d]imidazole (H₂bbim) on silver substrates under ultra-high vacuum. Using scanning probe microscopy, we find that the shape of 1D-CPs can be steered by metal-coordination templating with different metal atom sizes. Specifically, H₂bbim molecules and cobalt atoms on Ag(100) allow the formation of micrometer-sized 1D-CPs with porphyrinoids formed by covalently fused H₂bbim dimers, which is distinct from its counterpart of holmium-coordinated chains of monomers. This suggests that size-tuned metal templating is a good strategy for tailoring the formation of 1D-CPs, demonstrating its potential for next-generation electronic devices.

Keywords: scanning probe microscopy; 1D coordination polymers; metal templating