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Visualization and Comprehension of Electronic and Topographic Contrasts on Cooperatively Switched Diarylethene-Bridged Ditopic Ligand

Diarylethene is a prototypical molecular switch that can be reversibly photoisomerized between its open and closed forms. Ligands bpy-DAE-bpy, consisting of a phenyl-diarylethene-phenyl (DAE) central core and bipyridine (bpy) terminal substituents, are able to self-organize. They are investigated by...

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Autores principales: Hnid, Imen, Guan, Lihao, Chatir, Elarbi, Cobo, Saioa, Lafolet, Frédéric, Maurel, François, Lacroix, Jean-Christophe, Sun, Xiaonan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9029802/
https://www.ncbi.nlm.nih.gov/pubmed/35458026
http://dx.doi.org/10.3390/nano12081318
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author Hnid, Imen
Guan, Lihao
Chatir, Elarbi
Cobo, Saioa
Lafolet, Frédéric
Maurel, François
Lacroix, Jean-Christophe
Sun, Xiaonan
author_facet Hnid, Imen
Guan, Lihao
Chatir, Elarbi
Cobo, Saioa
Lafolet, Frédéric
Maurel, François
Lacroix, Jean-Christophe
Sun, Xiaonan
author_sort Hnid, Imen
collection PubMed
description Diarylethene is a prototypical molecular switch that can be reversibly photoisomerized between its open and closed forms. Ligands bpy-DAE-bpy, consisting of a phenyl-diarylethene-phenyl (DAE) central core and bipyridine (bpy) terminal substituents, are able to self-organize. They are investigated by scanning tunneling microscopy at the solid–liquid interface. Upon light irradiation, cooperative photochromic switching of the ligands is recognized down to the submolecular level. The closed isomers show different electron density of states (DOS) contrasts, attributed to the HOMO or LUMO molecular orbitals observed. More importantly, the LUMO images show remarkable differences between the open and closed isomers, attributed to combined topographic and electronic contrasts mainly on the DAE moieties. The electronic contrasts from multiple HOMO or LUMO distributions, combined with topographic distortion of the open or closed DAE, are interpreted by density functional theory (DFT) calculations.
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spelling pubmed-90298022022-04-23 Visualization and Comprehension of Electronic and Topographic Contrasts on Cooperatively Switched Diarylethene-Bridged Ditopic Ligand Hnid, Imen Guan, Lihao Chatir, Elarbi Cobo, Saioa Lafolet, Frédéric Maurel, François Lacroix, Jean-Christophe Sun, Xiaonan Nanomaterials (Basel) Article Diarylethene is a prototypical molecular switch that can be reversibly photoisomerized between its open and closed forms. Ligands bpy-DAE-bpy, consisting of a phenyl-diarylethene-phenyl (DAE) central core and bipyridine (bpy) terminal substituents, are able to self-organize. They are investigated by scanning tunneling microscopy at the solid–liquid interface. Upon light irradiation, cooperative photochromic switching of the ligands is recognized down to the submolecular level. The closed isomers show different electron density of states (DOS) contrasts, attributed to the HOMO or LUMO molecular orbitals observed. More importantly, the LUMO images show remarkable differences between the open and closed isomers, attributed to combined topographic and electronic contrasts mainly on the DAE moieties. The electronic contrasts from multiple HOMO or LUMO distributions, combined with topographic distortion of the open or closed DAE, are interpreted by density functional theory (DFT) calculations. MDPI 2022-04-12 /pmc/articles/PMC9029802/ /pubmed/35458026 http://dx.doi.org/10.3390/nano12081318 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hnid, Imen
Guan, Lihao
Chatir, Elarbi
Cobo, Saioa
Lafolet, Frédéric
Maurel, François
Lacroix, Jean-Christophe
Sun, Xiaonan
Visualization and Comprehension of Electronic and Topographic Contrasts on Cooperatively Switched Diarylethene-Bridged Ditopic Ligand
title Visualization and Comprehension of Electronic and Topographic Contrasts on Cooperatively Switched Diarylethene-Bridged Ditopic Ligand
title_full Visualization and Comprehension of Electronic and Topographic Contrasts on Cooperatively Switched Diarylethene-Bridged Ditopic Ligand
title_fullStr Visualization and Comprehension of Electronic and Topographic Contrasts on Cooperatively Switched Diarylethene-Bridged Ditopic Ligand
title_full_unstemmed Visualization and Comprehension of Electronic and Topographic Contrasts on Cooperatively Switched Diarylethene-Bridged Ditopic Ligand
title_short Visualization and Comprehension of Electronic and Topographic Contrasts on Cooperatively Switched Diarylethene-Bridged Ditopic Ligand
title_sort visualization and comprehension of electronic and topographic contrasts on cooperatively switched diarylethene-bridged ditopic ligand
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9029802/
https://www.ncbi.nlm.nih.gov/pubmed/35458026
http://dx.doi.org/10.3390/nano12081318
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