Abstract Structural determination and magnetic studies of two 3d-4f hexanuclear [CoIII2LnIII4(μ3-OH)2(NO3)4(OAc)4L4(DMF)2]·2C2H5OH [Ln = Dy(1), Gd(2); H2L = (E)-4-chloro-2-(((2-(hydroxymethyl)phenyl)imino)methyl)phenol] clusters are reported. Single-crystal X-ray diffraction studies reveal that the centrosymmetric hexanuclear metallic core is composed of a defect-dicubane Ln4 moiety and two CoIII ions. The Ln4 defect-dicubane central core is composed of four LnIII ions, which are supported by two oxygen atoms from the acetate groups, two alkoxo groups and two μ3-OH groups, which are displaced above and below the Ln4 plane. And two CoIII ions (one positioned above and one below the Ln4 plane) are linked to the defect-dicubane unit through two alkoxo groups and two phenoxido groups. This structure gives a CIS chair-like topology. Variable temperature direct current (dc) magnetic susceptibility measurements reveal the LnIII ions in complex 1 are ferromagnetic coupling, while antiferromagnetic coupling in 2. Complex 1 also displays an out-of-phase signal in the alternating current susceptibility indicating slow relaxation of the magnetization with Ueff = 31.6 K and τ0 = 5.66 × 10−6 s.

中文翻译：

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两个六核 [Co2III-Ln4III] 簇，包括一个 [Co2III-Dy4III] 单分子磁体

摘要 两种 3d-4f 六核 [CoIII2LnIII4(μ3-OH)2(NO3)4(OAc)4L4(DMF)2]·2C2H5OH [Ln = Dy(1), Gd(2); 报告了 H2L = (E)-4-chloro-2-(((2-(羟甲基)phenyl)imino)methyl)phenol] 簇。单晶 X 射线衍射研究表明，中心对称六核金属核由缺陷二立方烷 Ln4 部分和两个 CoIII 离子组成。Ln4 缺陷-二立方烷中心核由四个 LnIII 离子组成，它们由来自乙酸酯基团的两个氧原子、两个烷氧基和两个 μ3-OH 基团支撑，它们在 Ln4 平面的上下移动。并且两个 CoIII 离子（一个位于 Ln4 平面上方，一个位于 Ln4 平面下方）通过两个烷氧基和两个酚氧基连接到缺陷二立方烷单元。这种结构提供了 CIS 椅子状拓扑结构。