Linking Magnetic Clusters: Ferrimagnetic Interactions in a Nonanuclear Nickel(II) Cluster
作者:Fumichika Iijima、Koen Hasumi、Takuya Shiga、Graham N. Newton、Hiroki Oshio
DOI:10.1246/cl.2012.691
日期:2012.7.5
A nonanuclear nickel(II) cluster, [Ni9(H4L)2(OMe)6(OAc)10(H2O)4]·14H2O (1·14H2O), was synthesized by the reaction of an amide ligand H5L (= 2-hydroxy-4,6-dimethyl-N1,N3-bis(2-hydroxyethyl)-1,3-benzenedicarboxamide) with nickel acetate in the presence of triethylamine. The cluster molecule consists of two cubane units and a mononuclear central moiety, connected by acetate bridges. In the cubane cores, ferromagnetic interactions between nickel ions were operative, and the total spin ground state was S = 7 due to ferrimagnetic interactions between the two ferromagnetic cubane cores and the mononuclear nickel spacer.
通过酰胺配体 H5L(=2-羟基-4,6-二甲基-N1,N3-双(2-羟乙基)-1,3-苯二甲酰胺)与醋酸镍在三乙胺存在下的反应,合成了非核镍(II)簇[Ni9(H4L)2(OMe)6(OAc)10(H2O)4]-14H2O(1-14H2O)。簇分子由两个立方烷单元和一个单核中心分子组成,并通过醋酸桥连接。在立方烷核心中,镍离子之间的铁磁相互作用起作用,由于两个铁磁性立方烷核心和单核镍间隔物之间的铁磁相互作用,总自旋基态为 S = 7。