SMM features of a large lanthanide family of butterfly CrIII2 LnIII2 pivalate complexes (Ln = Gd, Tb, Dy, Ho, Er, Tm and Yb)

被引：0
|
作者：
Cabrosi, Daiana [1 ]
Mecchia Ortiz, Juan H. [1 ]
Carrella, Luca M. [2 ]
Rentschler, Eva [2 ]
Albores, Pablo [1 ]
机构：
[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Quim Inorgan Analit & Quim Fis INQUIMAE CONIC, Pabellon 2,Ciudad Univ, RA-C1428EHA Buenos Aires, Argentina
[2] Johannes Gutenberg Univ Mainz, Dept Chem, Duesbergweg 10-12, D-55128 Mainz, Germany
来源：
DALTON TRANSACTIONS | 2024年 / 53卷 / 29期
关键词：
SPIN-LATTICE-RELAXATION; SINGLE-MOLECULE MAGNETS; EXCHANGE; MAGNETIZATION; SLOW; ION;
D O I：
10.1039/d4dt01492h
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
In this work we report the synthesis, structural characterization and magnetic properties of a family of butterfly complexes {Cr(2)Ln(2)} 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.
引用
收藏
页码：12189 / 12198
页数：10
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