通过固定大气 CO 形成的有效去耦 Gd 簇，表现出优异的磁热性能。

Institute of Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany.

Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany.

Int J Mol Sci. 2023 Dec 23;25(1):264. doi: 10.3390/ijms25010264.

The [Gd(opch)(CO)(HO)]·4HO·10MeCN coordination cluster () crystallises in P1¯. The Gd core is held together by four bridging carbonates derived from atmospheric CO as well as the carboxyhydrazonyl oxygens of the 2-hydroxy-3-methoxybenzylidenepyrazine-2-carbohydrazide (Hopch) Schiff base ligands. The magnetic measurements show that the Gd ions are effectively uncoupled as seen from the low Weiss constant of 0.05 K needed to fit the inverse susceptibility to the Curie-Weiss law. Furthermore, the magnetisation data are consistent with the Brillouin function for eight independent Gd ions. These features lead to a magnetocaloric effect with a high efficiency which is 89% of the theoretical maximum value.

[Gd(opch)(CO)(HO)]·4HO·10MeCN 配位簇（）在 P1¯ 中结晶。Gd 核由四个桥连碳酸根以及 2-羟基-3-甲氧基苯亚甲基吡嗪-2-甲酰肼（Hopch）希夫碱配体的羧基氧原子共同稳定。磁性测量表明，Gd 离子是有效的去耦的，从拟合反磁化率到居里-外斯定律所需的低魏斯常数 0.05 K 即可看出。此外，磁化数据与 8 个独立 Gd 离子的布里渊函数一致。这些特征导致具有高效率的磁热效应，其效率为理论最大值的 89%。