Cyanide-Bridged Single-Molecule Magnet Constructed by an Octacoordinated [W(CN)₆(bpy)]^- Anion

Two cyanide-bridged WV−M [M = MnIII (1), CoII (2)] bimetallic clusters were prepared by self-assembling a new molecular precursor [W(CN)6(bpy)]- and the corresponding metal complexes. Compound 1 shows a tetranuclear W2Mn2 entity, consisting of a Jahn−Teller ion, MnIII, which serves as an anisotropic source, while compound 2 exhibits a trimeric W2Co structure. Among them, compound 1 displays slow relaxation of the magnetization, which is typical of a single-molecule magnet behavior.本研究通过新型分子前驱体[W(CN)₆(bpy)]⁻与对应金属配合物的自组装反应，制备得到两例氰基桥联的WV−M [M = MnIII(1)、CoII(2)]双金属簇合物。其中化合物1为四核W₂Mn₂结构单元，其包含作为各向异性源的姜-泰勒（Jahn-Teller）离子MnIII；化合物2则呈现三聚W₂Co结构。值得注意的是，化合物1表现出磁化慢弛豫现象，这是单分子磁体行为的典型特征。