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Synthetic Control of Quantum Interference by Regulating Charge on a Single Atom in Heteroaromatic Molecular Junctions
[Image: see text] A key area of activity in contemporary molecular electronics is the chemical control of conductance of molecular junctions and devices. Here we study and modify a range of pyrrolodipyridines (carbazole-like) molecular wires. We are able to change the electrical conductance and quan...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical
Society
2019
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7007252/ https://www.ncbi.nlm.nih.gov/pubmed/31577147 http://dx.doi.org/10.1021/acs.jpclett.9b02319 |
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author | Naghibi, Saman Ismael, Ali K. Vezzoli, Andrea Al-Khaykanee, Mohsin K. Zheng, Xijia Grace, Iain M. Bethell, Donald Higgins, Simon J. Lambert, Colin J. Nichols, Richard J. |
author_facet | Naghibi, Saman Ismael, Ali K. Vezzoli, Andrea Al-Khaykanee, Mohsin K. Zheng, Xijia Grace, Iain M. Bethell, Donald Higgins, Simon J. Lambert, Colin J. Nichols, Richard J. |
author_sort | Naghibi, Saman |
collection | PubMed |
description | [Image: see text] A key area of activity in contemporary molecular electronics is the chemical control of conductance of molecular junctions and devices. Here we study and modify a range of pyrrolodipyridines (carbazole-like) molecular wires. We are able to change the electrical conductance and quantum interference patterns by chemically regulating the bridging nitrogen atom in the tricyclic ring system. A series of eight different N-substituted pyrrolodipyridines has been synthesized and subjected to single-molecule electrical characterization using an STM break junction. Correlations of these experimental data with theoretical calculations underline the importance of the pyrrolic nitrogen in facilitating conductance across the molecular bridge and controlling quantum interference. The large chemical modulation for the meta-connected series is not apparent for the para-series, showing the competition between (i) meta-connectivity quantum interference phenomena and (ii) the ability of the pyrrolic nitrogen to facilitate conductance, that can be modulated by chemical substitution. |
format | Online Article Text |
id | pubmed-7007252 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Chemical
Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-70072522020-02-10 Synthetic Control of Quantum Interference by Regulating Charge on a Single Atom in Heteroaromatic Molecular Junctions Naghibi, Saman Ismael, Ali K. Vezzoli, Andrea Al-Khaykanee, Mohsin K. Zheng, Xijia Grace, Iain M. Bethell, Donald Higgins, Simon J. Lambert, Colin J. Nichols, Richard J. J Phys Chem Lett [Image: see text] A key area of activity in contemporary molecular electronics is the chemical control of conductance of molecular junctions and devices. Here we study and modify a range of pyrrolodipyridines (carbazole-like) molecular wires. We are able to change the electrical conductance and quantum interference patterns by chemically regulating the bridging nitrogen atom in the tricyclic ring system. A series of eight different N-substituted pyrrolodipyridines has been synthesized and subjected to single-molecule electrical characterization using an STM break junction. Correlations of these experimental data with theoretical calculations underline the importance of the pyrrolic nitrogen in facilitating conductance across the molecular bridge and controlling quantum interference. The large chemical modulation for the meta-connected series is not apparent for the para-series, showing the competition between (i) meta-connectivity quantum interference phenomena and (ii) the ability of the pyrrolic nitrogen to facilitate conductance, that can be modulated by chemical substitution. American Chemical Society 2019-10-02 2019-10-17 /pmc/articles/PMC7007252/ /pubmed/31577147 http://dx.doi.org/10.1021/acs.jpclett.9b02319 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Naghibi, Saman Ismael, Ali K. Vezzoli, Andrea Al-Khaykanee, Mohsin K. Zheng, Xijia Grace, Iain M. Bethell, Donald Higgins, Simon J. Lambert, Colin J. Nichols, Richard J. Synthetic Control of Quantum Interference by Regulating Charge on a Single Atom in Heteroaromatic Molecular Junctions |
title | Synthetic Control of Quantum Interference by Regulating
Charge on a Single Atom in Heteroaromatic Molecular Junctions |
title_full | Synthetic Control of Quantum Interference by Regulating
Charge on a Single Atom in Heteroaromatic Molecular Junctions |
title_fullStr | Synthetic Control of Quantum Interference by Regulating
Charge on a Single Atom in Heteroaromatic Molecular Junctions |
title_full_unstemmed | Synthetic Control of Quantum Interference by Regulating
Charge on a Single Atom in Heteroaromatic Molecular Junctions |
title_short | Synthetic Control of Quantum Interference by Regulating
Charge on a Single Atom in Heteroaromatic Molecular Junctions |
title_sort | synthetic control of quantum interference by regulating
charge on a single atom in heteroaromatic molecular junctions |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7007252/ https://www.ncbi.nlm.nih.gov/pubmed/31577147 http://dx.doi.org/10.1021/acs.jpclett.9b02319 |
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