On-surface Synthesis of a Semiconducting 2D Metal-Organic Framework Cu 3 (C 6 O 6 ) Exhibiting Dispersive Electronic Bands

A 2D metal-organic framework (2D-MOF) was formed on a Cu(111) substrate using benzenehexol molecules. By means of a combination of scanning tunneling microscopy and spectroscopy, X-ray photoelectron spectroscopy and density-functional theory, the structure of the 2D-MOF is determined to be Cu (C O )...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2020-02, Vol.59 (7), p.2669-2673
Main Authors: Zhang, Ran, Liu, Jing, Gao, Yifan, Hua, Muqing, Xia, Bowen, Knecht, Peter, Papageorgiou, Anthoula C, Reichert, Joachim, Barth, Johannes V, Xu, Hu, Huang, Li, Lin, Nian
Format: Article
Language:English
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Summary:A 2D metal-organic framework (2D-MOF) was formed on a Cu(111) substrate using benzenehexol molecules. By means of a combination of scanning tunneling microscopy and spectroscopy, X-ray photoelectron spectroscopy and density-functional theory, the structure of the 2D-MOF is determined to be Cu (C O ), which is stabilized by O-Cu-O bonding motifs. We find that upon adsorption on Cu(111), the 2D-MOF features a semiconductor band structure with a direct band gap of 1.5 eV. The O-Cu-O bonds offer efficient charge delocalization, which gives rise to a highly dispersive conduction band with an effective mass of 0.45 m at the band bottom, implying a high electron mobility in this material.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201913698