Magnetic exchange interactions in symmetric lanthanide dimetallics

Marcus J. Giansiracusa; Susan Al-Badran; Andreas K. Kostopoulos; George F.S. Whitehead; Eric J.L. McInnes; David Collison; Richard E.P. Winpenny; Nicholas F. Chilton

doi:10.1039/d0qi00854k

Magnetic exchange interactions in symmetric lanthanide dimetallics

Marcus J. Giansiracusa, Susan Al-Badran, Andreas K. Kostopoulos, George F.S. Whitehead, Eric J.L. McInnes, David Collison, Richard E.P. Winpenny, Nicholas F. Chilton

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

We report the synthesis and characterization of two symmetric homo-dimetallic lanthanide complexes based on methyl-substituted 8-hydroxyquinoline (HMeQ). The aryloxo-bridged core gives rise to weak magnetic coupling between pairs of ErIII and YbIII ions, as revealed by magnetic and EPR spectroscopy studies. EPR measurements of magnetically dilute species, coupled with CASSCF-SO calculations, allows modelling of the EPR spectra of the exchange coupled species and the magnetic data simultaneously. This work adds to the database of exchange coupled {Ln}2 molecules which have been thoroughly characterised by EPR spectroscopy and modelled using an Seff = 1/2 approach to describe the interaction of ground Kramers states, and highlights the differences between centro-symmetric and asymmetric dimetallics.

Original language	English
Pages (from-to)	3909-3918
Number of pages	10
Journal	Inorganic Chemistry Frontiers
Volume	7
Issue number	20
DOIs	https://doi.org/10.1039/d0qi00854k
Publication status	Published - 4 Sept 2020
Externally published	Yes

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title = "Magnetic exchange interactions in symmetric lanthanide dimetallics",

abstract = "We report the synthesis and characterization of two symmetric homo-dimetallic lanthanide complexes based on methyl-substituted 8-hydroxyquinoline (HMeQ). The aryloxo-bridged core gives rise to weak magnetic coupling between pairs of ErIII and YbIII ions, as revealed by magnetic and EPR spectroscopy studies. EPR measurements of magnetically dilute species, coupled with CASSCF-SO calculations, allows modelling of the EPR spectra of the exchange coupled species and the magnetic data simultaneously. This work adds to the database of exchange coupled {Ln}2 molecules which have been thoroughly characterised by EPR spectroscopy and modelled using an Seff = 1/2 approach to describe the interaction of ground Kramers states, and highlights the differences between centro-symmetric and asymmetric dimetallics.",

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T1 - Magnetic exchange interactions in symmetric lanthanide dimetallics

AU - Giansiracusa, Marcus J.

AU - Al-Badran, Susan

AU - Kostopoulos, Andreas K.

AU - Whitehead, George F.S.

AU - McInnes, Eric J.L.

AU - Collison, David

AU - Winpenny, Richard E.P.

AU - Chilton, Nicholas F.

PY - 2020/9/4

Y1 - 2020/9/4

N2 - We report the synthesis and characterization of two symmetric homo-dimetallic lanthanide complexes based on methyl-substituted 8-hydroxyquinoline (HMeQ). The aryloxo-bridged core gives rise to weak magnetic coupling between pairs of ErIII and YbIII ions, as revealed by magnetic and EPR spectroscopy studies. EPR measurements of magnetically dilute species, coupled with CASSCF-SO calculations, allows modelling of the EPR spectra of the exchange coupled species and the magnetic data simultaneously. This work adds to the database of exchange coupled {Ln}2 molecules which have been thoroughly characterised by EPR spectroscopy and modelled using an Seff = 1/2 approach to describe the interaction of ground Kramers states, and highlights the differences between centro-symmetric and asymmetric dimetallics.

AB - We report the synthesis and characterization of two symmetric homo-dimetallic lanthanide complexes based on methyl-substituted 8-hydroxyquinoline (HMeQ). The aryloxo-bridged core gives rise to weak magnetic coupling between pairs of ErIII and YbIII ions, as revealed by magnetic and EPR spectroscopy studies. EPR measurements of magnetically dilute species, coupled with CASSCF-SO calculations, allows modelling of the EPR spectra of the exchange coupled species and the magnetic data simultaneously. This work adds to the database of exchange coupled {Ln}2 molecules which have been thoroughly characterised by EPR spectroscopy and modelled using an Seff = 1/2 approach to describe the interaction of ground Kramers states, and highlights the differences between centro-symmetric and asymmetric dimetallics.

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DO - 10.1039/d0qi00854k

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EP - 3918

JO - Inorganic Chemistry Frontiers

JF - Inorganic Chemistry Frontiers

IS - 20

ER -

Magnetic exchange interactions in symmetric lanthanide dimetallics

Abstract

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