Imaging an unsupported metal–metal bond in dirhenium molecules at the atomic scale

Metallic bonds remain one of the most important and least understood of the chemical bonds. In this study, we generated Re(2) molecules in which the Re–Re core is unsupported by ligands. Real-time imaging of the atomic-scale dynamics of Re(2) adsorbed on a graphitic lattice allows direct measurement...

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Autores principales: Cao, Kecheng, Skowron, Stephen T., Biskupek, Johannes, Stoppiello, Craig T., Leist, Christopher, Besley, Elena, Khlobystov, Andrei N., Kaiser, Ute
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6968940/
https://www.ncbi.nlm.nih.gov/pubmed/32010771
http://dx.doi.org/10.1126/sciadv.aay5849
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author Cao, Kecheng
Skowron, Stephen T.
Biskupek, Johannes
Stoppiello, Craig T.
Leist, Christopher
Besley, Elena
Khlobystov, Andrei N.
Kaiser, Ute
author_facet Cao, Kecheng
Skowron, Stephen T.
Biskupek, Johannes
Stoppiello, Craig T.
Leist, Christopher
Besley, Elena
Khlobystov, Andrei N.
Kaiser, Ute
author_sort Cao, Kecheng
collection PubMed
description Metallic bonds remain one of the most important and least understood of the chemical bonds. In this study, we generated Re(2) molecules in which the Re–Re core is unsupported by ligands. Real-time imaging of the atomic-scale dynamics of Re(2) adsorbed on a graphitic lattice allows direct measurement of Re–Re bond lengths for individual molecules that changes in discrete steps correlating with bond order from one to four. Direct imaging of the Re–Re bond breaking process reveals a new bonding state with the bond order less than one and a high-amplitude vibrational stretch, preceding the bond dissociation. The methodology, based on aberration-corrected transmission electron microscopy imaging, is shown to be a powerful analytical tool for the investigation of dynamics of metallic bonding at the atomic level.
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spelling pubmed-69689402020-01-31 Imaging an unsupported metal–metal bond in dirhenium molecules at the atomic scale Cao, Kecheng Skowron, Stephen T. Biskupek, Johannes Stoppiello, Craig T. Leist, Christopher Besley, Elena Khlobystov, Andrei N. Kaiser, Ute Sci Adv Research Articles Metallic bonds remain one of the most important and least understood of the chemical bonds. In this study, we generated Re(2) molecules in which the Re–Re core is unsupported by ligands. Real-time imaging of the atomic-scale dynamics of Re(2) adsorbed on a graphitic lattice allows direct measurement of Re–Re bond lengths for individual molecules that changes in discrete steps correlating with bond order from one to four. Direct imaging of the Re–Re bond breaking process reveals a new bonding state with the bond order less than one and a high-amplitude vibrational stretch, preceding the bond dissociation. The methodology, based on aberration-corrected transmission electron microscopy imaging, is shown to be a powerful analytical tool for the investigation of dynamics of metallic bonding at the atomic level. American Association for the Advancement of Science 2020-01-17 /pmc/articles/PMC6968940/ /pubmed/32010771 http://dx.doi.org/10.1126/sciadv.aay5849 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Cao, Kecheng
Skowron, Stephen T.
Biskupek, Johannes
Stoppiello, Craig T.
Leist, Christopher
Besley, Elena
Khlobystov, Andrei N.
Kaiser, Ute
Imaging an unsupported metal–metal bond in dirhenium molecules at the atomic scale
title Imaging an unsupported metal–metal bond in dirhenium molecules at the atomic scale
title_full Imaging an unsupported metal–metal bond in dirhenium molecules at the atomic scale
title_fullStr Imaging an unsupported metal–metal bond in dirhenium molecules at the atomic scale
title_full_unstemmed Imaging an unsupported metal–metal bond in dirhenium molecules at the atomic scale
title_short Imaging an unsupported metal–metal bond in dirhenium molecules at the atomic scale
title_sort imaging an unsupported metal–metal bond in dirhenium molecules at the atomic scale
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6968940/
https://www.ncbi.nlm.nih.gov/pubmed/32010771
http://dx.doi.org/10.1126/sciadv.aay5849
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