Issue 29, 2024

SMM features of a large lanthanide family of butterfly Cr III2Ln III2 pivalate complexes (Ln = Gd, Tb, Dy, Ho, Er, Tm and Yb)

Abstract

In this work we report the synthesis, structural characterization and magnetic properties of a family of butterfly complexes {Cr2Ln2} with Ln = Tb (4), Ho (5), Er (6), Tm (7) and Yb (8), extending the family of previously reported isostructural compounds with Gd (1), Dy (2) and Y (3). As in 1 and 2, an anti-ferromagnetic Cr(III)–Ln(III) exchange interaction is found. For oblate ions 4 and 5, SMM behavior with a purely Orbach relaxation mechanism is observed with thermal barriers of 38 cm−1 (4) and 32 cm−1 (5). Complex 4 displays hysteresis opening up to 2.4 K with loss of magnetization at zero field. The prolate complex ions 6 and 7 are field-induced SMM's with dominant Orbach, direct and QTM relaxation mechanisms. Compound 8 did not show SMM properties.

Graphical abstract: SMM features of a large lanthanide family of butterfly CrIII2LnIII2 pivalate complexes (Ln = Gd, Tb, Dy, Ho, Er, Tm and Yb)

Supplementary files

Article information

Article type
Paper
Submitted
21 May 2024
Accepted
01 Jul 2024
First published
05 Jul 2024

Dalton Trans., 2024,53, 12189-12198

SMM features of a large lanthanide family of butterfly CrIII2LnIII2 pivalate complexes (Ln = Gd, Tb, Dy, Ho, Er, Tm and Yb)

D. Cabrosi, J. H. Mecchia Ortiz, L. M. Carrella, E. Rentschler and P. Alborés, Dalton Trans., 2024, 53, 12189 DOI: 10.1039/D4DT01492H

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