Mechanical single-molecule potentiometers with large switching factors from ortho-pentaphenylene foldamers
| Autor: | Shijie Zhen, Ben Zhong Tang, Jinshi Li, Chun Tang, Pingchuan Shen, Wenjing Hong, Dahai Zhou, Yiling Ye, Zujin Zhao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Science General Physics and Astronomy 02 engineering and technology 010402 general chemistry 01 natural sciences Article General Biochemistry Genetics and Molecular Biology law.invention law Molecular conductance Electronic devices Molecule Conformational isomerism Multidisciplinary Molecular machines and motors Conductance Charge (physics) General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical physics Scanning tunneling microscope 0210 nano-technology Break junction Order of magnitude |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-11 (2021) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Molecular potentiometers that can indicate displacement-conductance relationship, and predict and control molecular conductance are of significant importance but rarely developed. Herein, single-molecule potentiometers are designed based on ortho-pentaphenylene. The ortho-pentaphenylene derivatives with anchoring groups adopt multiple folded conformers and undergo conformational interconversion in solutions. Solvent-sensitive multiple conductance originating from different conformers is recorded by scanning tunneling microscopy break junction technique. These pseudo-elastic folded molecules can be stretched and compressed by mechanical force along with a variable conductance by up to two orders of magnitude, providing an impressively higher switching factor (114) than the reported values (ca. 1~25). The multichannel conductance governed by through-space and through-bond conducting pathways is rationalized as the charge transport mechanism for the folded ortho-pentaphenylene derivatives. These findings shed light on exploring robust single-molecule potentiometers based on helical structures, and are conducive to fundamental understanding of charge transport in higher-order helical molecules. Molecular potentiometers that can indicate displacement-conductance relationship, and predict and control molecular conductance are of significant importance but rarely developed. Here, the authors design a robust single-molecule potentiometers based on helical structures and give insight in fundamental understanding of charge transport in higher-order helical molecules. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|