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Issue 20, 2020

Magnetic exchange interactions in symmetric lanthanide dimetallics

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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.

Graphical abstract: Magnetic exchange interactions in symmetric lanthanide dimetallics

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Article information


Submitted
16 Jul 2020
Accepted
03 Sep 2020
First published
04 Sep 2020

This article is Open Access

Inorg. Chem. Front., 2020,7, 3909-3918
Article type
Research Article

Magnetic exchange interactions in symmetric lanthanide dimetallics

M. J. Giansiracusa, S. Al-Badran, A. K. Kostopoulos, G. F. S. Whitehead, E. J. L. McInnes, D. Collison, R. E. P. Winpenny and N. F. Chilton, Inorg. Chem. Front., 2020, 7, 3909 DOI: 10.1039/D0QI00854K

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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