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Low-Dimensional Metal-Organic Coordination Structures on Graphene.
Li, Jun Solianyk, Leonid Schmidt, Nico Baker, Brian Gottardi, Stefano Moreno Lopez, Juan Carlos Enache, Mihaela Monjas, Leticia van der Vlag, Ramon Havenith, Remco W A
Li, Jun
Solianyk, Leonid
Schmidt, Nico
Baker, Brian
Gottardi, Stefano
Moreno Lopez, Juan Carlos
Enache, Mihaela
Monjas, Leticia
van der Vlag, Ramon
Havenith, Remco W A
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2019-05-23
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Abstract
We report the formation of one- and two-dimensional metal-organic coordination structures from para-hexaphenyl-dicarbonitrile (NC-Ph6-CN) molecules and Cu atoms on graphene epitaxially grown on Ir(111). By varying the stoichiometry between the NC-Ph6-CN molecules and Cu atoms, the dimensionality of the metal-organic coordination structures could be tuned: for a 3:2 ratio, a two-dimensional hexagonal porous network based on threefold Cu coordination was observed, while for a 1:1 ratio, one-dimensional chains based on twofold Cu coordination were formed. The formation of metal-ligand bonds was supported by imaging the Cu atoms within the metal-organic coordination structures with scanning tunneling microscopy. Scanning tunneling spectroscopy measurements demonstrated that the electronic properties of NC-Ph6-CN molecules and Cu atoms were different between the two-dimensional porous network and one-dimensional molecular chains.
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J Phys Chem C Nanomater Interfaces. 2019 May 23;123(20):12730-12735. doi: 10.1021/acs.jpcc.9b00326. Epub 2019 Apr 30.
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1932-7447
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Attribution-NonCommercial-ShareAlike 4.0 International