Issue 15, 2023

Magnetic materials based on heterometallic CrII/III–LnIII complexes

Abstract

Accommodating disparate spin centres within a single ensemble is a valuable synthetic strategy to obtain interesting molecular magnetic materials. 3d–4f heterometallic complexes are one such subclass that has been extensively explored for the last three decades owing to their interesting magnetic properties. The primary reason is that the bridging ligand mediates magnetic super-exchange between 3d and 4f ions to considerably reduce the prevalent quantum tunnelling of magnetisation (QTM) in such complexes. Among the 3d–4f family, CrIII–LnIII assemblies nicely demonstrate the pivotal role played by strong exchange interactions between these two individual spin carriers to engender interesting single-molecule magnet (SMM) properties. In fact, this part of heterometallic chemistry has flourished greatly in the last decade despite its late development. In this review we provide an extensive synthetic, structural, magnetic, and magnetocaloric description of various CrIII–LnIII complexes along with their fundamental mechanisms of exchange interaction. Finally, we provide some possible solutions to improve the SMM properties of the CrIII–LnIII and other heterometallic complexes.

Graphical abstract: Magnetic materials based on heterometallic CrII/III–LnIII complexes

Article information

Article type
Review Article
Submitted
31 yan 2023
Accepted
28 may 2023
First published
31 may 2023

Inorg. Chem. Front., 2023,10, 4322-4357

Magnetic materials based on heterometallic CrII/III–LnIII complexes

P. Shukla, S. Das, P. Bag and A. Dey, Inorg. Chem. Front., 2023, 10, 4322 DOI: 10.1039/D3QI00193H

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