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在水溶液中合成了二乙三胺五乙酸与镧铜异核配合物兰色棱柱状晶体,用X射线衍射方法测定了配合物的晶体结构.其结构式为{[La_4Cu_9(DTPA)_6(H_2O)_(16)]·26H_2O}_n,DTPA为二乙三胺五乙酸根.晶体属三斜晶系,空间群为P(?)每一晶胞中有1个配合单元,形成网状结构,晶胞参数如下:a=1.5635(5),b=1.6496(6),c=1.7116(3)nm,α=89.07(2),β=73.91(2),γ=65.82(3)°,V=3.839nm~3,Ζ=1,D_(calc)=1.822g/cm~3,D_(ex)=1.831g/cm~3.配合物中镧离子有两种配位方式,配位数一种是8,另一种是9,其配位多面体分别为双冠和三冠三角棱柱体;铜离子也有两种配位方式,配位数一种是6,另一种是5,分别形成八面体和四方锥型配位多面体.
The crystal structure of the complex was synthesized by the reaction of diethylenetriamine pentaacetic acid and lanthanum copper heteronuclear complex in aqueous solution. The crystal structure of the complex was determined by X-ray diffraction and its structure was {[La_4Cu_9 (DTPA) _6 (H_2O) _ (16)] · 26H_2O} _n, DTPA is diethylenetriaminepentaacetate. The crystal belongs to the triclinic system with space group P (?) There is one coordination unit in each unit cell to form a network structure, The cell parameters are as follows: a = 1.5635 (5), b = 1.6496 (6), c = 1.7116 (3) nm, α = 89.07 (2), β = 73.91 (2), γ = 65.82 = 3.839nm ~ 3, Z = 1, D calc = 1.822g / cm ~ 3 and D ex = 1.831g / cm ~ 3.The lanthanum ions have two coordination modes The species is 8, and the other is 9, the coordination polyhedron is a double crown and a triple crown triangular prism; copper ions also have two kinds of coordination, a coordination number is 6, the other is 5, were formed Octahedral and tetragonal pyramid coordination polyhedron.