Two Oxime-Based {<i>Ln</i><sup>III</sup><sub>3</sub>Ni<sup>II</sup><sub>3</sub>} Clusters with Triangular {<i>Ln</i><sub>3</sub>(μ<sub>3</sub>-Ο<sub>2</sub>)}<sup>7+</sup>Core: Solvothermal Syntheses, Crystal Structures, and Magnetic Properties
作者:Xiao-Ting Wang、Hui-Ming Dong、Xiu-Guang Wang、En-Cui Yang、Xiao-Jun Zhao
DOI:10.1002/zaac.201600253
日期:2016.10
Two isostructural heterometallic complexes, [Dy3Ni3(H2O)3(mpko)9(O2)(NO3)3](ClO4)·3CH3OH·3CH3CN} (1) and [Gd3Ni3(H2O)3(mpko)9(O2)(NO3)3](NO3)·10.75CH3OH} (2) [mpkoH = 1-(pyrazin-2-yl)ethanone oxime], were solvothermally synthesized by varying lanthanide ions with different magnetic anisotropy. Structural analyses revealed that both complexes contain a peroxide anion-aggregated triangular Ln3(μ3-Ο2)}7+
两种同构异金属配合物,[Dy3Ni3(H2O)3(mpko)9(O2)(NO3)3](ClO4)·3CH3OH·3CH3CN}(1)和[Gd3Ni3(H2O)3(mpko)9(O2) (NO3)3](NO3)·10.75CH3OH} (2) [mpkoH = 1-(吡嗪-2-基)乙酮肟],通过改变具有不同磁各向异性的镧系元素离子进行溶剂热合成。结构分析表明,这两种配合物都含有一个过氧化物阴离子聚集的三角形 Ln3(μ3-Ο2)}7+ 核,其被三个 NiII 八面体通过三重肟键包围成异金属六核簇。在耦合常数为 JLn…Ni ≈ 12JLn…Ln 的 1 和 2 的相邻自旋载流子之间观察到明显的反铁磁相互作用。此外,