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Issue 8, 2018
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Two-dimensional delocalized states in organometallic bis-acetylide networks on Ag(111)

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Abstract

The electronic structure of surface-supported organometallic networks with Ag-bis-acetylide bonds that are intermediate products in the bottom-up synthesis of graphdiyne and graphdiyne-like networks were studied. Scanning tunneling microscopy (STM) and spectroscopy (STS) reveal a frontier, unoccupied electronic state that is delocalized along the entire organometallic network and proves the covalent nature of the Ag-bis-acetylide bonds. Density-functional theory (DFT) calculations corroborate the spatial distribution of the observed delocalized state and attribute it to band mixing of carbon and silver atoms combined with n-doping of the metal surface. The metal-bis-acetylide bonds are typical metal–organic bonds with mixed character containing covalent and strong ionic contributions. Moreover, the organometallic networks exhibit a characteristic graphene-like band structure with linear band dispersion at each K point.

Graphical abstract: Two-dimensional delocalized states in organometallic bis-acetylide networks on Ag(111)

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Article information


Submitted
05 Nov 2017
Accepted
30 Jan 2018
First published
05 Feb 2018

Nanoscale, 2018,10, 3769-3776
Article type
Paper

Two-dimensional delocalized states in organometallic bis-acetylide networks on Ag(111)

Z. Yang, J. Gebhardt, T. A. Schaub, T. Sander, J. Schönamsgruber, H. Soni, A. Görling, M. Kivala and S. Maier, Nanoscale, 2018, 10, 3769
DOI: 10.1039/C7NR08238J

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