Dual Modulation of Single Molecule Conductance via Tuning Side Chains and Electric Field with Conjugated Molecules Entailing Intramolecular O•••S Interactions
Abstract Herein, single‐molecule conductance studies of TBT1‐TBT6 which entails 1,4‐dithienylbenzene as the backbone and SMe groups as the anchoring units, with the scanning tunneling microscope break junction (STM‐BJ) technique, are reported. The molecular conductance of TBT1 with intramolecular O...
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202105667 |
| _version_ | 1811248040221081600 |
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| author | Hua Zhang Wei Xu Kai Song Taige Lu Guanxin Zhang Yaping Zang Wenjing Hong Deqing Zhang |
| author_facet | Hua Zhang Wei Xu Kai Song Taige Lu Guanxin Zhang Yaping Zang Wenjing Hong Deqing Zhang |
| author_sort | Hua Zhang |
| collection | DOAJ |
| description | Abstract Herein, single‐molecule conductance studies of TBT1‐TBT6 which entails 1,4‐dithienylbenzene as the backbone and SMe groups as the anchoring units, with the scanning tunneling microscope break junction (STM‐BJ) technique, are reported. The molecular conductance of TBT1 with intramolecular O•••S noncovalent interactions is enhanced by about one order of magnitude in comparison to their analogue TBT2 (which contains alkyl instead of alkoxy chains). By replacing the methoxy groups in TBT1 with extending alkoxy chains in TBT3, TBT4, and TBT5, the molecular backbones become twisted and as a consequence the single‐molecule conductance decreases gradually, showing that the intramolecular O•••S noncovalent interaction is influenced by the structural features of alkoxy chains. More importantly, the single‐molecule conductance of TBT3, TBT4, and TBT5 can be boosted by increasing the electric field applied to the molecular junctions. Remarkably, the conductance of TBT3, TBT4, and TBT5 can be reversibly modulated due to the conformational changes between twisted and planar ones by varying the electric field. These results demonstrate that molecules with intramolecular O•••S noncovalent interactions have the potential for in situ control of the electrical properties of molecular‐scale devices. |
| first_indexed | 2024-04-12T15:20:01Z |
| format | Article |
| id | doaj.art-d623b3fc0dda4dc2a94b69083ce572c5 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-12T15:20:01Z |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-d623b3fc0dda4dc2a94b69083ce572c52022-12-22T03:27:30ZengWileyAdvanced Science2198-38442022-06-01917n/an/a10.1002/advs.202105667Dual Modulation of Single Molecule Conductance via Tuning Side Chains and Electric Field with Conjugated Molecules Entailing Intramolecular O•••S InteractionsHua Zhang0Wei Xu1Kai Song2Taige Lu3Guanxin Zhang4Yaping Zang5Wenjing Hong6Deqing Zhang7Beijing National Laboratory for Molecular Sciences Organic Solids Laboratory Institute of Chemistry Chinese Academy of Sciences Beijing 100190 ChinaState Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 ChinaBeijing National Laboratory for Molecular Sciences Organic Solids Laboratory Institute of Chemistry Chinese Academy of Sciences Beijing 100190 ChinaState Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 ChinaBeijing National Laboratory for Molecular Sciences Organic Solids Laboratory Institute of Chemistry Chinese Academy of Sciences Beijing 100190 ChinaBeijing National Laboratory for Molecular Sciences Organic Solids Laboratory Institute of Chemistry Chinese Academy of Sciences Beijing 100190 ChinaState Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 ChinaBeijing National Laboratory for Molecular Sciences Organic Solids Laboratory Institute of Chemistry Chinese Academy of Sciences Beijing 100190 ChinaAbstract Herein, single‐molecule conductance studies of TBT1‐TBT6 which entails 1,4‐dithienylbenzene as the backbone and SMe groups as the anchoring units, with the scanning tunneling microscope break junction (STM‐BJ) technique, are reported. The molecular conductance of TBT1 with intramolecular O•••S noncovalent interactions is enhanced by about one order of magnitude in comparison to their analogue TBT2 (which contains alkyl instead of alkoxy chains). By replacing the methoxy groups in TBT1 with extending alkoxy chains in TBT3, TBT4, and TBT5, the molecular backbones become twisted and as a consequence the single‐molecule conductance decreases gradually, showing that the intramolecular O•••S noncovalent interaction is influenced by the structural features of alkoxy chains. More importantly, the single‐molecule conductance of TBT3, TBT4, and TBT5 can be boosted by increasing the electric field applied to the molecular junctions. Remarkably, the conductance of TBT3, TBT4, and TBT5 can be reversibly modulated due to the conformational changes between twisted and planar ones by varying the electric field. These results demonstrate that molecules with intramolecular O•••S noncovalent interactions have the potential for in situ control of the electrical properties of molecular‐scale devices.https://doi.org/10.1002/advs.202105667electric fieldsintramolecular conformational tuningmolecular switchsingle‐molecule conductance |
| spellingShingle | Hua Zhang Wei Xu Kai Song Taige Lu Guanxin Zhang Yaping Zang Wenjing Hong Deqing Zhang Dual Modulation of Single Molecule Conductance via Tuning Side Chains and Electric Field with Conjugated Molecules Entailing Intramolecular O•••S Interactions Advanced Science electric fields intramolecular conformational tuning molecular switch single‐molecule conductance |
| title | Dual Modulation of Single Molecule Conductance via Tuning Side Chains and Electric Field with Conjugated Molecules Entailing Intramolecular O•••S Interactions |
| title_full | Dual Modulation of Single Molecule Conductance via Tuning Side Chains and Electric Field with Conjugated Molecules Entailing Intramolecular O•••S Interactions |
| title_fullStr | Dual Modulation of Single Molecule Conductance via Tuning Side Chains and Electric Field with Conjugated Molecules Entailing Intramolecular O•••S Interactions |
| title_full_unstemmed | Dual Modulation of Single Molecule Conductance via Tuning Side Chains and Electric Field with Conjugated Molecules Entailing Intramolecular O•••S Interactions |
| title_short | Dual Modulation of Single Molecule Conductance via Tuning Side Chains and Electric Field with Conjugated Molecules Entailing Intramolecular O•••S Interactions |
| title_sort | dual modulation of single molecule conductance via tuning side chains and electric field with conjugated molecules entailing intramolecular o•••s interactions |
| topic | electric fields intramolecular conformational tuning molecular switch single‐molecule conductance |
| url | https://doi.org/10.1002/advs.202105667 |
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