Constructive quantum interference in a bis-copper six-porphyrin nanoring
Constructive quantum interference in a bis-copper six-porphyrin nanoring
The exchange interaction, J, between two spin centres is a convenient measure of through bond electronic communication. Here, we investigate quantum interference phenomena in a bis-copper six-porphyrin nanoring by electron paramagnetic resonance spectroscopy via measurement of the exchange coupling between the copper centres. Using an analytical expression accounting for both dipolar and exchange coupling to simulate the time traces obtained in a double electron electron resonance experiment, we demonstrate that J can be quantified to high precision even in the presence of significant through-space coupling. We show that the exchange coupling between two spin centres is increased by a factor of 4.5 in the ring structure with two parallel coupling paths as compared to an otherwise identical system with just one coupling path, which is a clear signature of constructive quantum interference.
Richert, Sabine
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Cremers, Jonathan
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Kuprov, Ilya
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Peeks, Martin D.
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Anderson, Harry L.
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Timmel, Christiane R.
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22 March 2017
Richert, Sabine
b7d2a647-5393-44c6-b39c-c677abcf1a63
Cremers, Jonathan
007802f1-5eb5-4206-a632-48cb248a1bc1
Kuprov, Ilya
bb07f28a-5038-4524-8146-e3fc8344c065
Peeks, Martin D.
64bb47e1-274f-4ad7-873e-7d3349006caa
Anderson, Harry L.
30cdcaf7-e460-409f-b9c3-96ded4744081
Timmel, Christiane R.
e0ae17b0-5dc2-46b8-94ba-1fd2c0481e8c
Richert, Sabine, Cremers, Jonathan, Kuprov, Ilya, Peeks, Martin D., Anderson, Harry L. and Timmel, Christiane R.
(2017)
Constructive quantum interference in a bis-copper six-porphyrin nanoring.
Nature Communications, 8, [14842].
(doi:10.1038/ncomms14842).
Abstract
The exchange interaction, J, between two spin centres is a convenient measure of through bond electronic communication. Here, we investigate quantum interference phenomena in a bis-copper six-porphyrin nanoring by electron paramagnetic resonance spectroscopy via measurement of the exchange coupling between the copper centres. Using an analytical expression accounting for both dipolar and exchange coupling to simulate the time traces obtained in a double electron electron resonance experiment, we demonstrate that J can be quantified to high precision even in the presence of significant through-space coupling. We show that the exchange coupling between two spin centres is increased by a factor of 4.5 in the ring structure with two parallel coupling paths as compared to an otherwise identical system with just one coupling path, which is a clear signature of constructive quantum interference.
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ncomms14842
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Accepted/In Press date: 3 February 2017
e-pub ahead of print date: 22 March 2017
Published date: 22 March 2017
Organisations:
Computational Systems Chemistry
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Local EPrints ID: 407379
URI: http://eprints.soton.ac.uk/id/eprint/407379
PURE UUID: 64de2bf0-8acd-4d87-8340-d7be06a7723a
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Date deposited: 05 Apr 2017 01:05
Last modified: 16 Mar 2024 04:11
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Author:
Sabine Richert
Author:
Jonathan Cremers
Author:
Martin D. Peeks
Author:
Harry L. Anderson
Author:
Christiane R. Timmel
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