Department of Chemistry, University of Crete, Voutes 71003, Herakleion, Greece.
Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC & Universidad de Zaragoza, 50009 Zaragoza, Spain.
J Am Chem Soc. 2023 Apr 12;145(14):7743-7747. doi: 10.1021/jacs.3c01610. Epub 2023 Apr 3.
Reaction of Gd(OAc)·4HO, salicylaldehyde and CHONa in MeCN/MeOH affords [GdNa(OAc)(HCO)(CO)(HO)]·9HO.0.5MeCN (·9HO.0.5MeCN), whose structure describes a quadruple-wheel consisting of two {Na} and two {Gd} rings. The magnetic properties of reveal very weak antiferromagnetic interactions between the Gd ions, which give rise to a record magnetocaloric effect at low applied magnetic fields and low temperatures. The magnetic entropy change reaches -Δ= 29.3 J kg K for full demagnetization from = 1 T at = 0.5 K.
Gd(OAc)·4HO、水杨醛和 CHONa 在 MeCN/MeOH 中的反应生成了[GdNa(OAc)(HCO)(CO)(HO)]·9HO.0.5MeCN（·9HO.0.5MeCN），其结构描述了由两个{Na}和两个{Gd}环组成的四轮。揭示了 Gd 离子之间非常弱的反铁磁相互作用，这导致在低外磁场和低温下产生了创纪录的磁热效应。在 0.5 K 时从 1 T 完全退磁时，磁熵变化达到 -Δ= 29.3 J kg K。
