General One-Step Self-Assembly of Isostructural Intermetallic CoII3LnIII Cubane Aggregates

A new family of Co/rare-earth intermetallic cubane aggregates
[Co3Ln­(hmp)4(OAc)5H2O]
(Ln =
Dy, Ho, Er, Tm, Yb, Y) have been synthesized by self-assembly. Single-crystal
X-ray diffraction analysis revealed that they are remarkably isostructural
in showing a common [Co3Ln] core. Magnetic studies showed
that the Dy, Er, Tm, Yb, and Y complexes are ferromagnetic. The Dy
complex exhibits the largest magnetocaloric effect (−ΔSm = 12.58 J kg–1 K–1), which can be attributed to the large magnetic density of DyIII.

一种新型的钴/稀土金属间化合物立方烷聚集体[Co3Ln(hmp)4(OAc)5H2O](其中Ln代表Dy、Ho、Er、Tm、Yb、Y)通过自组装合成而成。单晶X射线衍射分析揭示了它们在结构上具有显著的一致性，均呈现出共同的[Co3Ln]核心。磁性研究表明，Dy、Er、Tm、Yb和Y的配合物均表现出铁磁性。其中，Dy配合物展现出最大的磁致热效应（-ΔSm = 12.58 J kg–1 K–1），这可归因于DyIII的大磁密度。