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STM fingerprint of molecule-adatom interactions in a self-assembled metal-organic surface coordination network on Cu(111)

A novel approach of identifying metal atoms within a metal-organic surface coordination network using scanning tunnelling microscopy (STM) is presented. The Cu adatoms coordinated in the porous surface network of 1,3,8,10-tetraazaperopyrene (TAPP) molecules on a Cu(111) surface give rise to a charac...

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Main Authors: Björk, Jonas (Author) , Matena, Manfred (Author) , Dyer, Matthew S. (Author) , Enache, Mihaela (Author) , Lobo-Checa, Jorge (Author) , Gade, Lutz H. (Author) , Jung, Thomas (Author) , Stöhr, Meike (Author) , Persson, Mats (Author)
Format: Article (Journal)
Language:English
Published: 30th April 2010
In: Physical chemistry, chemical physics
Year: 2010, Volume: 12, Issue: 31, Pages: 8815-8821
ISSN:1463-9084
DOI:10.1039/C003660A
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1039/C003660A
Verlag, lizenzpflichtig, Volltext: https://pubs.rsc.org/en/content/articlelanding/2010/cp/c003660a
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Author Notes:Jonas Björk, Manfred Matena, Matthew S. Dyer, Mihaela Enache, Jorge Lobo-Checa, Lutz H. Gade, Thomas A. Jung, Meike Stöhr and Mats Persson
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Summary:A novel approach of identifying metal atoms within a metal-organic surface coordination network using scanning tunnelling microscopy (STM) is presented. The Cu adatoms coordinated in the porous surface network of 1,3,8,10-tetraazaperopyrene (TAPP) molecules on a Cu(111) surface give rise to a characteristic electronic resonance in STM experiments. Using density functional theory calculations, we provide strong evidence that this resonance is a fingerprint of the interaction between the molecules and the Cu adatoms. We also show that the bonding of the Cu adatoms to the organic exodentate ligands is characterised by both the mixing of the nitrogen lone-pair orbitals of TAPP with states on the Cu adatoms and the partial filling of the lowest unoccupied molecular orbital (LUMO) of the TAPP molecule. Furthermore, the key interactions determining the surface unit cell of the network are discussed.
Item Description:Gesehen am 10.02.2023
Physical Description:Online Resource
ISSN:1463-9084
DOI:10.1039/C003660A

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