Issue 10, 2023

Elucidating the exchange interactions in a {GdIIICuII4} propellor


The multinucleating ligand 2,2′-(propane-1,3-diyldiimino)bis[2-(hydroxymethyl)-propane-1,3-diol] (bis–tris propane, H6L) is used in the design of a new family of 3d–4f complexes that display an unusual {LnCu4} four-blade propeller topology. We report the synthesis, structure and magnetic characterisation of [LnCu4(H4L)4](Cl)2(ClO4)·6CH3OH, where Ln = Gd (1), Tb (2), Dy (3), La (4). Previously we have used CH3COO and NO3 as co-ligands with bis–tris propane, but here the use of Cl and ClO4 leads to coordination of four {Cu(H4L)} units around the central Ln ion. A magneto-structural analysis reveals that the geometrical arrangement of the Cu(II) centres defined by the H4L2− ligands controls the magnetic communication between the different metal centres. DFT calculations performed on the isotropic (Gd) and diamagnetic (La) systems 1 and 4 help to unravel the intriguing exchange interactions.

Graphical abstract: Elucidating the exchange interactions in a {GdIIICuII4} propellor

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Article information

Article type
02 Dec 2022
01 Feb 2023
First published
02 Feb 2023
This article is Open Access
Creative Commons BY license

Dalton Trans., 2023,52, 3203-3209

Elucidating the exchange interactions in a {GdIIICuII4} propellor

M. J. Heras Ojea, C. Wilson, J. Cirera, H. Oshio, E. Ruiz and M. Murrie, Dalton Trans., 2023, 52, 3203 DOI: 10.1039/D2DT03901J

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