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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 by providing reliable control of the number, nature and geometry of donor atoms, akin to how a protein cavity controls the properties of bound metal ions. 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 behavior 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 behavior 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
Cirulli, Martina
96448dc8-63d7-4f0b-9a09-18f96452aec2
Salvadori, Enrico
cce7795d-9563-4725-9ba8-c46eb9d42598
Zhang, Zhi-hui
b75889e4-30ae-4843-a1e7-1cd7a013a27c
Dommett, Michael
2ddd1546-caea-418f-8ce3-791fcf204cfc
Tuna, Floriana
37d7fedd-c62c-4f2f-bcc6-de6b56c9ef17
Bamberger, Heiko
ea8e05ea-d7a1-4c27-9d4f-4e286fdb3f70
Lewis, James
42b46a03-a7ca-4d3a-96e5-a5c962fc9573
Kaur, Amanpreet
d6c7e09a-e2e2-4d97-ad62-ea8c112c1fdd
Tizzard, Graham
8474c0fa-40df-43a6-a662-7f3c4722dbf2
Van Slageren, Joris
d61e4f66-3490-404c-9bfe-b903c49a6d75
Crespo-otero, Rachel
1c2ae912-91f2-4e51-a71f-50cc0e544e02
Goldup, Stephen Michael
0a93eedd-98bb-42c1-a963-e2815665e937
Roessler, Maxie
3baa37c6-6453-4e49-a662-a0930ae9a07f
Cirulli, Martina
96448dc8-63d7-4f0b-9a09-18f96452aec2
Salvadori, Enrico
cce7795d-9563-4725-9ba8-c46eb9d42598
Zhang, Zhi-hui
b75889e4-30ae-4843-a1e7-1cd7a013a27c
Dommett, Michael
2ddd1546-caea-418f-8ce3-791fcf204cfc
Tuna, Floriana
37d7fedd-c62c-4f2f-bcc6-de6b56c9ef17
Bamberger, Heiko
ea8e05ea-d7a1-4c27-9d4f-4e286fdb3f70
Lewis, James
42b46a03-a7ca-4d3a-96e5-a5c962fc9573
Kaur, Amanpreet
d6c7e09a-e2e2-4d97-ad62-ea8c112c1fdd
Tizzard, Graham
8474c0fa-40df-43a6-a662-7f3c4722dbf2
Van Slageren, Joris
d61e4f66-3490-404c-9bfe-b903c49a6d75
Crespo-otero, Rachel
1c2ae912-91f2-4e51-a71f-50cc0e544e02
Goldup, Stephen Michael
0a93eedd-98bb-42c1-a963-e2815665e937
Roessler, Maxie
3baa37c6-6453-4e49-a662-a0930ae9a07f

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. (doi:10.1002/anie.202103596).

Record type: Article

Abstract

Mechanically chelating ligands have untapped potential for the engineering of metal ion properties by providing reliable control of the number, nature and geometry of donor atoms, akin to how a protein cavity controls the properties of bound metal ions. 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 behavior 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 behavior of the rotaxane Co II complexes demonstrates that interlocked ligands offer a new strategy to design metal complexes with interesting functionality.

Full text not available from this repository.

More information

Accepted/In Press date: 26 April 2021
e-pub ahead of print date: 26 April 2021
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

Catalogue record

Date deposited: 18 May 2021 16:40
Last modified: 23 Jun 2021 01:45

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