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SYNTHESIS AND CRYSTAL STRUCTURE OF A HETERONUCLEAR ERBIUM AND YTTRIUM COMPLEX WITH PROLINE: [ErY(Pro)4(H2O)8](ClO4)6

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Author:
No author available
Journal Title:
CHINESE JOURNAL OF APPLIED & ENVIRONMENTAL BIOLOGY
Issue:
3
DOI:
10.3321/j.issn:1006-687X.2000.03.005
Key Word:
稀土;铒铱异核配合物;脯氨酸;晶体结构

Abstract: 为了研究稀土离子与氨基酸(Pro)的相互作用,在pH≈3.5水溶液中合成了高氯酸八水.(脯氨酸)合铱(Ⅲ)铒(Ⅲ),获得了单晶,并经四圆衍射仪测定了结构.配合物组成为C20H52Cl6ErN4O40Y,属三斜晶系,P1空间群.晶胞参数a=0.986 0(2)° nm, b=1.302 0(5) nm, c=1.363 2(5) nm, α=109.32(3)°, β=110.19(2)°, γ=100.96(2)°,V=1.456(1) nm3, Z=1,Dc=1.663 g/cm3,μ=2.797 mm-1,F(000)=729.配合物分子中,Y3+`、Er3+在相应位置上出现的几率各为50%,相邻两个金属离子被两个以桥式双齿配位的Pro分子连接,每个金属离子除了与4个羧基O配位外,还与4个水分子的氧配位,配位数为8,形成变形的四方反棱柱. 图4 表3 参10

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