Hydrazone‐Ligand‐Based Homodinuclear Lanthanide Complexes: Synthesis, Structure, and Magnetism
作者:Sourav Biswas、Sourav Das、Guillaume Rogez、Vadapalli Chandrasekhar
DOI:10.1002/ejic.201600335
日期:2016.7
dinuclear assembly, the two lanthanides are bridged by two phenolate and two pivalate oxygens. Each of the two lanthanide ions is nine-coordinated and possesses a distorted monocapped square-antiprism geometry. Detailed magnetochemical analysis revealed the presence of weak antiferromagnetic coupling at low temperature for all complexes. The DyIII analogue displayed SMM behavior in the absence of a dc field
一系列双核镧系元素配合物,[Dy2(LH)2(µ2-Piv-κ2O,O')2(NO3-κ2O,O')2] (1), [Tb2(LH)2(µ2-Piv-κ2O) ,O')2(NO3-κ2O,O')2] (2), [Gd2(LH)2(μ2-Piv-κ2O,O')2(NO3-κ2O,O')2] (3),和 [Ho2(LH)2(µ2-Piv-κ2O,O')2(NO3-κ2O,O')2] (4) 是由 Ln(NO3)3·nH2O 与多齿腙反应合成的-基于席夫碱配体,N'-(2-羟基-3-甲氧基亚苄基)乙酰肼(LH2)在新戊酸存在下。X 射线晶体学数据显示 1-4 是同构的、中性的,并含有两个单去质子化配体、两个新戊酸盐和两个螯合硝酸盐。在双核组装中,两个镧系元素由两个酚盐和两个新戊酸盐氧桥接。两个镧系元素离子中的每一个都是九配位的,并且具有扭曲的单帽方形反棱镜几何形状。详细的磁化学分析表明,所有配合