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Rotaxane coII complexes as field‐induced single‐ion magnets

Rotaxane coII complexes as field‐induced single‐ion magnets
Rotaxane coII complexes as field‐induced single‐ion magnets

Mechanically chelating ligands have untapped potential for the engineering of metal ion properties. Here we demonstrate this principle in the context of Co II-based single-ion magnets. Using multi-frequency EPR, susceptibility and magnetization measurements we found that these complexes show some of the highest zero field splittings reported for five-coordinate Co II complexes to date. The predictable coordination behaviour of the interlocked ligands allowed the magnetic properties of their Co II complexes to be evaluated computationally a priori and our combined experimental and theoretical approach enabled us to rationalize the observed trends. The predictable magnetic behaviour of the rotaxane Co II complexes demonstrates that interlocked ligands offer a new strategy to design metal complexes with interesting functionality.

electron paramagnetic resonance, magnetism, rotaxanes, single ion magnets, zero-field splitting
1433-7851
16051-16058
Cirulli, Martina
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Salvadori, Enrico
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Zhang, Zhi-hui
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Dommett, Michael
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Tuna, Floriana
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Bamberger, Heiko
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Lewis, James
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Kaur, Amanpreet
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Tizzard, Graham
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Van Slageren, Joris
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Crespo-otero, Rachel
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Goldup, Stephen Michael
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Roessler, Maxie
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Cirulli, Martina
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Salvadori, Enrico
cce7795d-9563-4725-9ba8-c46eb9d42598
Zhang, Zhi-hui
b75889e4-30ae-4843-a1e7-1cd7a013a27c
Dommett, Michael
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Tuna, Floriana
37d7fedd-c62c-4f2f-bcc6-de6b56c9ef17
Bamberger, Heiko
ea8e05ea-d7a1-4c27-9d4f-4e286fdb3f70
Lewis, James
42b46a03-a7ca-4d3a-96e5-a5c962fc9573
Kaur, Amanpreet
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Tizzard, Graham
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Van Slageren, Joris
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Crespo-otero, Rachel
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Goldup, Stephen Michael
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Roessler, Maxie
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Cirulli, Martina, Salvadori, Enrico, Zhang, Zhi-hui, Dommett, Michael, Tuna, Floriana, Bamberger, Heiko, Lewis, James, Kaur, Amanpreet, Tizzard, Graham, Van Slageren, Joris, Crespo-otero, Rachel, Goldup, Stephen Michael and Roessler, Maxie (2021) Rotaxane coII complexes as field‐induced single‐ion magnets. Angewandte Chemie International Edition, 60 (29), 16051-16058. (doi:10.1002/anie.202103596).

Record type: Article

Abstract

Mechanically chelating ligands have untapped potential for the engineering of metal ion properties. Here we demonstrate this principle in the context of Co II-based single-ion magnets. Using multi-frequency EPR, susceptibility and magnetization measurements we found that these complexes show some of the highest zero field splittings reported for five-coordinate Co II complexes to date. The predictable coordination behaviour of the interlocked ligands allowed the magnetic properties of their Co II complexes to be evaluated computationally a priori and our combined experimental and theoretical approach enabled us to rationalize the observed trends. The predictable magnetic behaviour of the rotaxane Co II complexes demonstrates that interlocked ligands offer a new strategy to design metal complexes with interesting functionality.

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More information

Accepted/In Press date: 26 April 2021
e-pub ahead of print date: 26 April 2021
Published date: 12 July 2021
Additional Information: Funding Information: This work was supported financially by the QMUL Materials Research Institute (studentship to M.C.), the Royal Society (Research Fellowship to S.M.G.; SERB co‐funded Newton International Fellowship to A.K.), the European Union (Marie Skłodowska‐Curie Fellowship 660731 to JEML), European Research Council (Consolidator Grant 724987 to SMG.), the China Scholarship Council (studentship to Z.Z.), Imperial College (Research Fellowship to J.E.M.L.), the EPSRC (EP/R029385/1 to R.C.O.), Leverhulme Trust (RPG‐2019‐122 to R.C.O.) and the DFG (INST 41/863‐1 and SL104/10‐1 to J.v.S.). This research utilized QMUL's Apocrita HPC facility and the IRIDIS High Performance Computing Facility (and associated support services) at the University of Southampton. The EPSRC National EPR Facility at Manchester is gratefully acknowledged for magnetic measurements. We thank Mr David Hunger for help in fitting the ac data. Data supporting this study are openly available from the University of Southampton repository at https://doi.org/10.5258/SOTON/D1846. Funding Information: This work was supported financially by the QMUL Materials Research Institute (studentship to M.C.), the Royal Society (Research Fellowship to S.M.G.; SERB co-funded Newton International Fellowship to A.K.), the European Union (Marie Sk?odowska-Curie Fellowship 660731 to JEML), European Research Council (Consolidator Grant 724987 to SMG.), the China Scholarship Council (studentship to Z.Z.), Imperial College (Research Fellowship to J.E.M.L.), the EPSRC (EP/R029385/1 to R.C.O.), Leverhulme Trust (RPG-2019-122 to R.C.O.) and the DFG (INST 41/863-1 and SL104/10-1 to J.v.S.). This research utilized QMUL's Apocrita HPC facility and the IRIDIS High Performance Computing Facility (and associated support services) at the University of Southampton. The EPSRC National EPR Facility at Manchester is gratefully acknowledged for magnetic measurements. We thank Mr David Hunger for help in fitting the ac data. Data supporting this study are openly available from the University of Southampton repository at https://doi.org/10.5258/SOTON/D1846. Publisher Copyright: © 2021 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH
Keywords: electron paramagnetic resonance, magnetism, rotaxanes, single ion magnets, zero-field splitting

Identifiers

Local EPrints ID: 449175
URI: http://eprints.soton.ac.uk/id/eprint/449175
ISSN: 1433-7851
PURE UUID: 1f9bb1bd-cfd6-4f7c-a28f-69178289cfb4
ORCID for Graham Tizzard: ORCID iD orcid.org/0000-0002-1577-5779
ORCID for Stephen Michael Goldup: ORCID iD orcid.org/0000-0003-3781-0464

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Date deposited: 18 May 2021 16:40
Last modified: 17 Mar 2024 02:53

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Contributors

Author: Martina Cirulli
Author: Enrico Salvadori
Author: Zhi-hui Zhang
Author: Michael Dommett
Author: Floriana Tuna
Author: Heiko Bamberger
Author: James Lewis
Author: Amanpreet Kaur
Author: Graham Tizzard ORCID iD
Author: Joris Van Slageren
Author: Rachel Crespo-otero
Author: Maxie Roessler

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