Journal
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
Volume 6, Issue -, Pages 327-335Publisher
BEILSTEIN-INSTITUT
DOI: 10.3762/bjnano.6.31
Keywords
di(propiolonitrile) linker; lanthanides; metal-organic networks; molecular self-assembly; organic monolayers; single crystal X-ray diffraction analysis; UHV-STM
Funding
- EC-MoQuaS [FP7-ICT-2013-10]
- Marie Curie action [EIF-041565 MoST]
- ERC [247299]
- China Scholarship Council
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As a continuation of our work employing polyphenylene-dicarbonitrile molecules and in particular the terphenyl derivative 1 (TDCN), we have synthesized a novel ditopic terphenyl-4,4-di(propiolonitrile) (2) linker for the self-assembly of organic monolayers and metal coordination at interfaces. The structure of the organic linker 2 was confirmed by single crystal X-ray diffraction analysis (XRD). On the densely packed Ag(111) surface, the terphenyl-4,4-di(propiolonitrile) linkers self-assemble in a regular, molecular chevron arrangement exhibiting a Moire pattern. After the exposure of the molecular monolayer to a beam of Gd atoms, the propiolonitrile groups get readily involved in metal-ligand coordination interactions. Distinct coordination motifs evolve with coordination numbers varying between three and six for the laterally-bound Gd centers. The linker molecules retain an overall flat adsorption geometry. However, only networks with restricted local order were obtained, in marked contrast to previously employed, simpler polyphenylene-dicarbonitrile 1 linkers.
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