Low-Dimensional Metal-Organic Coordination Structures on Graphene

Author(s)
Jun Li, Leonid Solianyk, Nico Schmidt, Brian Baker, Stefano Gottardi, Juan Carlos Moreno Lopez, Mihaela Enache, Leticia Monjas, Ramon van der Vlag, Remco W. A. Havenith, Anna K. H. Hirsch, Meike Stöhr
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.

Organisation(s)
Electronic Properties of Materials
External organisation(s)
University of Groningen, Ghent University , Helmholtz Ctr Infect Res HZI, Helmholtz-Center for Infection Research, Helmholtz Association, Helmholtz Inst Pharmaceut Res Saarland HIPS, Dept Drug Design & Optimizat, Universität des Saarlandes
Journal
Journal of Physical Chemistry C
Volume
123
Pages
12730-12735
No. of pages
6
ISSN
1932-7447
DOI
https://doi.org/10.1021/acs.jpcc.9b00326
Publication date
05-2019
Peer reviewed
Yes
Austrian Fields of Science 2012
Physical chemistry, Materials physics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/lowdimensional-metalorganic-coordination-structures-on-graphene(0ccddf57-4d69-4c7a-a9cd-c60e5136a64e).html