二维层状谷氨酸-Gd配合物的合成、结构及磁性研究

Synthesis,Structure and Magnetic Property of 2D Layer L-Glutamic Acid-Gadolinium Complex

以柔性多齿L-谷氨酸为配体,合成配合物{[Gd_4(L-HGlu)_4(H_2O)_(16)](ClO_4)_8·5H_2O}_n(L-HGlu为L-谷氨酸负一价离子).通过元素分析、红外、X-射线单晶衍射和X-射线粉末衍射对配合物的晶体结构进行表征.X-单晶衍射分析表明配合物是以谷氨酸配体连接双核Gd单元构筑的二维阳离子层状结构的稀土配位聚合物,高氯酸根和水分子填充在二维层间.变温磁化率测试发现配合物中Gd-Gd之间存在弱的反铁磁相互作用.

Based on the flexible multidentate L-glutamic acid as ligand,complex{[Gd 4(L-HGlu)4(H 2O)16](ClO 4)8·5H 2O}n(L-HGlu=L-glutamate anion)was synthesized.The crystal structure of the complex was characterized by using elemental analysis,IR,X-ray single crystal diffraction and powder X-ray diffraction(PXRD).The X-ray diffraction analysis showed that the complex is two-dimensional layered lanthanide coordination polymer constructed by binuclear Gd units and glutamic acid,perchlorate anions and free water molecules are filled in the two-dimensional layers.Variable temperature magnetic susceptibility showed that the existence of weak antiferromagnetic interactions between Gd-Gd in complex.