SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 14: Nanostructures at Surfaces (joint session O/CPP)

O 14.6: Vortrag

Montag, 27. März 2023, 16:15–16:30, GER 39

Modification of Single-Layer Organometallic Networks: from Ag-Bridged to Cu-Bridged Alkynyl Metal-Alkynyl Linkages on Ag(111) Surfaces — •Wenchao Zhao, Felix Haag, Ignacio Piquero-Zulaica, Yi-Qi Zhang, Francesco Allegretti, Biao Yang, and Johannes V Barth — Physics Department E20, Technical University of Munich, 85748 Garching, Germany

The metal-exchange reaction, is of importance for the advanced preparation of functional metal-organic frameworks for various applications[1]. Notably, building two-dimensional organometallic networks (OMNs), can provide versatile nanoarchitectures for potential application in nanodevice[2,3]. Although various OMNs have been constructed with molecular building blocks by abstracting surface metal atoms, the degree of success is often individual and substrate-dependent. Thus metal-exchange reactions hold promise for multiple production by modification and functionalization of OMN templates. Here, we demonstrate the modification of a single-layer OMN by metal-exchange reaction. By introducing external Cu atoms into the alkynyl-Ag OMN[3], we successfully synthesized in situ a highly ordered alkynyl-Cu OMN on a Ag(111) surface. While maintaining a similar lattice periodicity and pore morphology, it possesses higher thermal stability, guaranteeing higher robustness for possible applications. Reference. 1. M.-M. Xu et al., Coord. Chem. Rev. 2020, 421, 213421. 2. D. Ecija et al., Acc. Chem. Res. 2018, 51, 365-375. 3. Y.-Q. Zhang et al., J. Am. Chem. Soc. 2019, 141, 5087-5091