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A metal-metal bond between coordination complexes is in the nature of the covalent bond in hydrocarbons. While bimetallic and trimetallic compounds usually have three-dimensional structures in solution, the high directionality and robustness of the bond can be applied for on-surface syntheses. Here, we present a systematic formation of complex organometallic oligomers on Cu(111) through sequential ring-opening of 11,11,12,12-tetraphenyl-1,4,5,8-tetraazaanthraquinodimethane and bonding of phenanthroline derivatives by multiple Cu atoms. A detailed characterization with a combination of scanning tunneling microscopy and density functional theory calculations revealed the role of the Cu adatoms in both enantiomers of chiral oligomers. Furthermore, we found sufficient strength of the bonds against sliding friction by manipulating the oligomers up to a hexamer. This finding may help to increase the variety of organometallic nanostructures on surfaces.

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  This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright © 2023AmericanChemicalSociety after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsnano.3c10524

Keyword: Organometallic oligomer, On-surface synthesis, Tip-induced manipulation, Scanning tunneling microscopy, Density functional theory calculations

Date published: 2023-12-12

Publisher: American Chemical Society (ACS)

Journal:

• ACS Nano (ISSN: 1936086X) vol. 17 issue. 23 p. 24355-24362

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4308

First published URL: https://doi.org/10.1021/acsnano.3c10524

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Updated at: 2024-12-04 14:53:18 +0900

Published on MDR: 2024-12-04 14:53:18 +0900