Tuning the electrical conductance of metalloporphyrin supramolecular wires
In contrast with conventional single-molecule junctions, in which the current flows parallel to the long axis or plane of a molecule, we investigate the transport properties of M(II)-5,15-diphenylporphyrin (M-DPP) single-molecule junctions (M=Co, Ni, Cu, or Zn divalent metal ions), in which the curr...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal Article |
| Published: |
Nature Publishing Group
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/22308 |
| _version_ | 1848750834282659840 |
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| author | Noori, M. Aragonès, A. Di Palma, G. Darwish, Nadim Bailey, S. Al-Galiby, Q. Grace, I. Amabilino, D. González-Campo, A. Díez-Pérez, I. Lambert, C. |
| author_facet | Noori, M. Aragonès, A. Di Palma, G. Darwish, Nadim Bailey, S. Al-Galiby, Q. Grace, I. Amabilino, D. González-Campo, A. Díez-Pérez, I. Lambert, C. |
| author_sort | Noori, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In contrast with conventional single-molecule junctions, in which the current flows parallel to the long axis or plane of a molecule, we investigate the transport properties of M(II)-5,15-diphenylporphyrin (M-DPP) single-molecule junctions (M=Co, Ni, Cu, or Zn divalent metal ions), in which the current flows perpendicular to the plane of the porphyrin. Novel STM-based conductance measurements combined with quantum transport calculations demonstrate that current-perpendicular-to-the-plane (CPP) junctions have three-orders-of-magnitude higher electrical conductances than their current-in-plane (CIP) counterparts, ranging from 2.10-2 G0 for Ni-DPP up to 8.10-2 G0 for Zn-DPP. The metal ion in the center of the DPP skeletons is strongly coordinated with the nitrogens of the pyridyl coated electrodes, with a binding energy that is sensitive to the choice of metal ion. We find that the binding energies of Zn-DPP and Co-DPP are significantly higher than those of Ni-DPP and Cu-DPP. Therefore when combined with its higher conductance, we identify Zn-DPP as the favoured candidate for high-conductance CPP single-molecule devices. |
| first_indexed | 2025-11-14T07:43:08Z |
| format | Journal Article |
| id | curtin-20.500.11937-22308 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:43:08Z |
| publishDate | 2016 |
| publisher | Nature Publishing Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-223082017-09-13T13:55:05Z Tuning the electrical conductance of metalloporphyrin supramolecular wires Noori, M. Aragonès, A. Di Palma, G. Darwish, Nadim Bailey, S. Al-Galiby, Q. Grace, I. Amabilino, D. González-Campo, A. Díez-Pérez, I. Lambert, C. In contrast with conventional single-molecule junctions, in which the current flows parallel to the long axis or plane of a molecule, we investigate the transport properties of M(II)-5,15-diphenylporphyrin (M-DPP) single-molecule junctions (M=Co, Ni, Cu, or Zn divalent metal ions), in which the current flows perpendicular to the plane of the porphyrin. Novel STM-based conductance measurements combined with quantum transport calculations demonstrate that current-perpendicular-to-the-plane (CPP) junctions have three-orders-of-magnitude higher electrical conductances than their current-in-plane (CIP) counterparts, ranging from 2.10-2 G0 for Ni-DPP up to 8.10-2 G0 for Zn-DPP. The metal ion in the center of the DPP skeletons is strongly coordinated with the nitrogens of the pyridyl coated electrodes, with a binding energy that is sensitive to the choice of metal ion. We find that the binding energies of Zn-DPP and Co-DPP are significantly higher than those of Ni-DPP and Cu-DPP. Therefore when combined with its higher conductance, we identify Zn-DPP as the favoured candidate for high-conductance CPP single-molecule devices. 2016 Journal Article http://hdl.handle.net/20.500.11937/22308 10.1038/srep37352 Nature Publishing Group fulltext |
| spellingShingle | Noori, M. Aragonès, A. Di Palma, G. Darwish, Nadim Bailey, S. Al-Galiby, Q. Grace, I. Amabilino, D. González-Campo, A. Díez-Pérez, I. Lambert, C. Tuning the electrical conductance of metalloporphyrin supramolecular wires |
| title | Tuning the electrical conductance of metalloporphyrin supramolecular wires |
| title_full | Tuning the electrical conductance of metalloporphyrin supramolecular wires |
| title_fullStr | Tuning the electrical conductance of metalloporphyrin supramolecular wires |
| title_full_unstemmed | Tuning the electrical conductance of metalloporphyrin supramolecular wires |
| title_short | Tuning the electrical conductance of metalloporphyrin supramolecular wires |
| title_sort | tuning the electrical conductance of metalloporphyrin supramolecular wires |
| url | http://hdl.handle.net/20.500.11937/22308 |