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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MDPI AG
2022-04-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/8/1318 |
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| author | Imen Hnid Lihao Guan Elarbi Chatir Saioa Cobo Frédéric Lafolet François Maurel Jean-Christophe Lacroix Xiaonan Sun |
| author_facet | Imen Hnid Lihao Guan Elarbi Chatir Saioa Cobo Frédéric Lafolet François Maurel Jean-Christophe Lacroix Xiaonan Sun |
| author_sort | Imen Hnid |
| collection | DOAJ |
| 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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| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T13:12:23Z |
| publishDate | 2022-04-01 |
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| series | Nanomaterials |
| spelling | doaj.art-2e1383ee775143188e0f3e8cd4e530f02023-11-30T21:39:53ZengMDPI AGNanomaterials2079-49912022-04-01128131810.3390/nano12081318Visualization and Comprehension of Electronic and Topographic Contrasts on Cooperatively Switched Diarylethene-Bridged Ditopic LigandImen Hnid0Lihao Guan1Elarbi Chatir2Saioa Cobo3Frédéric Lafolet4François Maurel5Jean-Christophe Lacroix6Xiaonan Sun7Department of Chemistry, Université de Paris, ITODYS, CNRS, F-75006 Paris, FranceDepartment of Chemistry, Université de Paris, ITODYS, CNRS, F-75006 Paris, FranceDepartment of Chemistry, Université Grenoble Alpes, DCM-UMR 5250, F-38000 Grenoble, FranceDepartment of Chemistry, Université Grenoble Alpes, DCM-UMR 5250, F-38000 Grenoble, FranceDepartment of Chemistry, Université de Paris, ITODYS, CNRS, F-75006 Paris, FranceDepartment of Chemistry, Université de Paris, ITODYS, CNRS, F-75006 Paris, FranceDepartment of Chemistry, Université de Paris, ITODYS, CNRS, F-75006 Paris, FranceDepartment of Chemistry, Université de Paris, ITODYS, CNRS, F-75006 Paris, FranceDiarylethene 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.https://www.mdpi.com/2079-4991/12/8/1318photochromicdiarylethenebipyridinehigh-resolution scanning tunneling microscopycooperative switchesmolecular orbital |
| spellingShingle | Imen Hnid Lihao Guan Elarbi Chatir Saioa Cobo Frédéric Lafolet François Maurel Jean-Christophe Lacroix Xiaonan Sun Visualization and Comprehension of Electronic and Topographic Contrasts on Cooperatively Switched Diarylethene-Bridged Ditopic Ligand Nanomaterials photochromic diarylethene bipyridine high-resolution scanning tunneling microscopy cooperative switches molecular orbital |
| 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 | photochromic diarylethene bipyridine high-resolution scanning tunneling microscopy cooperative switches molecular orbital |
| url | https://www.mdpi.com/2079-4991/12/8/1318 |
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