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

In this work we report the synthesis, structural characterization and magnetic properties of a family of butterfly complexes {Cr Ln } 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,...

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Published inDalton transactions : an international journal of inorganic chemistry Vol. 53; no. 29; pp. 12189 - 12198
Main Authors Cabrosi, Daiana, Mecchia Ortiz, Juan H, Carrella, Luca M, Rentschler, Eva, Alborés, Pablo
Format Journal Article
LanguageEnglish
Published England 23.07.2024
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Summary:In this work we report the synthesis, structural characterization and magnetic properties of a family of butterfly complexes {Cr Ln } 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 (4) and 32 cm (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.
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ISSN:1477-9226
1477-9234
1477-9234
DOI:10.1039/d4dt01492h