Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 92: Nanostructures at Surfaces II

O 92.2: Vortrag

Donnerstag, 21. März 2024, 15:15–15:30, MA 042

Fe-coordinated PcZn(OH)₈ Frameworks on Ag(111) by Electrospray-controlled Ion Beam Deposition — •Pengfei Zhao¹, Wei Ran¹, Andreas Walz¹, Annette Hüttig¹, Hartmut Schlichting¹, Renhao Dong², Xinliang Feng², Anthoula C. Papageorgiou^1,3, Joachim Reichert¹, and Johannes V. Barth¹ — ¹Technical University of Munich, Germany — ²Dresden University of Technology, Germany — ³National and Kapodistrian University of Athens, Greece

Molecular engineering of two-dimensional metal-organic frameworks (2D-MOFs) has garnered significant interest for their structural and functional tunability.¹ However, challenges persist in preparing model systems suitable for investigations at the sub-nanometer scale in a well-defined environment. Here, we present a versatile approach to fabricate 2D-MOFs from an un-sublimable metal-phthalocyanine complex (PcZn(OH)₈) via electrospray-controlled ion beam deposition (ESCIBD) on a coinage metal surface.² By scanning tunneling microscopy, we find that upon adsorption on Ag(111), PcZn(OH)₈ features close-packed molecular assemblies stabilized by lateral intermolecular interactions. After dosing Fe and annealing at 423 K, PcZn(OH)₈ exhibits Fe-coordinated 2D-MOFs. These results confirm that ESCIBD can expand the on-surface synthesis of MOF-based materials to thermolabile, highly functionalized organic compounds.

Reference

[1] H. Zhong, et al., Nat Commun, 2020, 11, 1409.

[2] A. Walz, et al., Anal Chem, 2022, 94, 7767-7778.

Keywords: Scanning tunneling microscopy; Electrospray-controlled ion beam deposition; Two-dimensional metal-organic framework