Low-Dimensional Metal−Organic Coordination Structures on Graphene

Jun Li, Leonid Solianyk, Nico Schmidt, Brian Baker, Stefano Gottardi, Juan Carlos Moreno Lopez, Mihaela Enache, Leticia Monjas Gómez, Ramon van der Vlag, Remco Havenith, Anna Hirsch, Meike Stöhr*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
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Abstract

We report the formation of one- and two-dimensional metal-organic coordination structures from para-hexaphenyl-dicarbonitrile (NC-Ph-6-CN) molecules and Cu atoms on graphene epitaxially grown on Ir(111). By varying the stoichiometry between the NC-Ph-6-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-Ph-6-CN molecules and Cu atoms were different between the two-dimensional porous network and one-dimensional molecular chains.
Original languageEnglish
Pages (from-to)12730-12735
Number of pages6
JournalJournal of Physical Chemistry C
Volume123
Issue number20
Early online date30-Apr-2019
DOIs
Publication statusPublished - 23-May-2019

Keywords

  • NETWORK
  • TRANSPARENT
  • CU(111)
  • ACID
  • STM

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