Article (Scientific journals)
Real-Time Imaging of On-Surface Ullmann Polymerization Reveals an Inhibiting Effect of Adatoms.
Dettmann, Dominik; PANIGHEL, Mirco; Preetha Genesh, Navathej et al.
2024In Journal of the American Chemical Society, 146 (35), p. 24493–24502
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This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Journal of the American Chemical Society, copyright © 2024 American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/jacs.4c06994.
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Keywords :
scanning tunneling microscopy; density functional theory; ultra-high vacuum; surface science; nanotechnology; Ullmann coupling; polymerization; oligomers; monomers; on-surface synthesis; self-assembly; fast stm; high speed stm
Abstract :
[en] Ullmann coupling is a widely used reaction for the on-surface growth of low-dimensional carbon nanomaterials. The irreversible nature of this reaction prevents the "self-healing" of defects, and a detailed knowledge of its mechanism is therefore essential to enable the growth of extended ordered structures. However, the dynamics of the Ullmann polymerization remain largely unexplored, as coupling events occur on a timescale faster than conventional scanning probe microscopy imaging frequencies. Here, we reveal the dynamics of these surface events using high-speed variable-temperature scanning tunneling microscopy (STM) (10 frames per second). Performing the measurements at the onset reaction temperatures provides an unprecedented description of the evolution of organometallic (OM) and covalent surface species during the Ullmann polymerization of para-dibromobenzene on Cu(110). Our results demonstrate the existence of an intermediate OM phase with Cu adatoms that inhibits the polymerization. These observations now complete the picture of the pathways of on-surface Ullmann polymerization, which includes the complex interplay of the phenylene moieties and metal atoms. Our work demonstrates the unique capability of high-speed STM to capture the dynamics of molecular self-assembly and coupling.
Disciplines :
Physics
Author, co-author :
Dettmann, Dominik;  Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique Department, 1650 Boulevard Lionel-Boulet, Varennes, J3X 1P7 Québec, Canada ; Istituto di Struttura della Materia-CNR (ISM-CNR), Via Fosso del Cavaliere 100, 00133 Roma, Italy
PANIGHEL, Mirco  ;  CNR-IOM, Laboratorio, TASC, S.S. 14 Km 163.5, Basovizza, 34149 Trieste, Italy
Preetha Genesh, Navathej ;  Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique Department, 1650 Boulevard Lionel-Boulet, Varennes, J3X 1P7 Québec, Canada
Galeotti, Gianluca;  Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique Department, 1650 Boulevard Lionel-Boulet, Varennes, J3X 1P7 Québec, Canada
MacLean, Oliver ;  Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique Department, 1650 Boulevard Lionel-Boulet, Varennes, J3X 1P7 Québec, Canada ; Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, 130103 Changchun, P. R. China
Farnesi Camellone, Matteo ;  Consiglio Nazionale delle Ricerche-Istituto Officina dei Materiali (CNR-IOM), C/o SISSA, Via Bonomea 265, 34136 Trieste, Italy
Johal, Tarnjit Kaur;  Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique Department, 1650 Boulevard Lionel-Boulet, Varennes, J3X 1P7 Québec, Canada
Fabris, Stefano;  Consiglio Nazionale delle Ricerche-Istituto Officina dei Materiali (CNR-IOM), C/o SISSA, Via Bonomea 265, 34136 Trieste, Italy
Africh, Cristina ;  Consiglio Nazionale delle Ricerche-Istituto Officina dei Materiali (CNR-IOM), C/o SISSA, Via Bonomea 265, 34136 Trieste, Italy
Perepichka, Dmytro F ;  Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, H3A 0B8 Québec, Canada
Rosei, Federico ;  Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgeri 1, 34127 Trieste, Italy
Contini, Giorgio ;  Istituto di Struttura della Materia-CNR (ISM-CNR), Via Fosso del Cavaliere 100, 00133 Roma, Italy ; Department of Physics, University Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy
External co-authors :
yes
Language :
English
Title :
Real-Time Imaging of On-Surface Ullmann Polymerization Reveals an Inhibiting Effect of Adatoms.
Publication date :
21 August 2024
Journal title :
Journal of the American Chemical Society
ISSN :
0002-7863
eISSN :
1520-5126
Publisher :
American Chemical Society (ACS), United States
Volume :
146
Issue :
35
Pages :
24493–24502
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
H2020 - 654360 - NFFA-Europe - NANOSCIENCE FOUNDRIES AND FINE ANALYSIS - EUROPE
Funders :
Regione Lazio
Fonds de recherche du Québec – Nature et technologies
Horizon 2020 Framework Programme
Ministero degli Affari Esteri e della Cooperazione Internazionale
Natural Sciences and Engineering Research Council of Canada
Alliance de recherche numérique du Canada
Government of Ontario
Union Européenne
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