摘要
在水溶液中培养了镨，钕，钇与甘氨酸形成的三元配合物，元素分析和热分析表明，该配合物可用ＰｒｘＮｄｙＹｚ（Ｇｌｙ）６（Ｈ２Ｏ）４（ＣｌＯ４）６．５Ｈ２Ｏ（ｘ＋ｙ＋ｚ＝２）表示其分子式。Ｘ射线衍射方法测定了其单晶结构，结果表明，该晶体属三斜晶系，空间群Ｐ１，化学式Ｐｒ０．７７５Ｎｄ０．７００Ｙ０．５２５Ｃｌ６Ｏ４５Ｎ６Ｃ１２Ｈ４８，Ｍｒ＝１４６６．０９晶胞参数如下：ａ＝１１．５６４（１），ｂ＝１４．
The heternuclear mixed complex Pr_x Nd_yY_z(Gly)_6(ClO_4)_6(H_2O) 4·SH_2O(x+ y+z =2) has been synthesized in the aqueous solution.The X-ray single crystal structure analysis shows that the crystal is triclinic system with space group P1 and the unit cell parameters are as follows:a=11.564(1),b=14.118(3),c=15.668(2) A,α=96.99(1)°,β=102.72(1)°,γ=105.33 (1)°.There are two complex units in the unit cell,every complex unit is M_1M_2 (Gly)_6(ClO_4)_6-( H_2O)_4·5H_2O, M_1=0.495Pr + 0.375Nd + 0.225Y,M_2 =0.375Pr+ 0.325Nd + 0.30Y.Three rare earth ions each occupy the two positions statistically with the definite proportions.The crystal is a one-dimenstional chain structure the carboxyl of glycinic acid serves as bridging groups connecting the metal atoms.The coordination number of one rare earth ion is nine,with the geometry of a distorted tricapped trigonal prism,the other is eight,with the geometry of a distorted dicapped trigonal prism.
关键词
氨基酸
稀土
配合物
晶体结构
镨
钕
钇
rare earth,complex crystal structure,glycinic acid
