合成了稀土离子Nd、Gd、Er与β-丙氨酸的配合物并进行了元素分析、红外光谱等表征,测定了3个配合物的晶体结构. 配合物组成为{[Ln2(β-ala)6(H2O)4](ClO4)6*H2O}n(Ln=Nd(1)、Gd(2)、Er(3)),配合物均属于三斜晶系, P1空间群,主要晶体学数据为:(1):a=1.291 3(3) nm,b=2.176 5(4) nm,c=0.936 82(19) nm,α= 99.07(3)°,β=96.91(3)°,γ=76.75(3)°,Z=2,Dc=1.988 Mg/m3,F(000)=1 502,R1=0.054 7,wR2=0.140 8;(2):a=1.291 1(3) nm,b=2.167 9(4) nm,c=0.927 17(19) nm,α=98.94(3)°,β=97.00(3)°,γ=76.85(3)°,Z=2,Dc=2.050 Mg/m3,F(000)=1 518,R1 =0.052 2,wR2=0.143 0;(3):a=1.288 0(3) nm,b=2.162 9(4) nm,c=0.921 03(18) nm,α=98.77(3)°,β=97.29(3)°,γ=76.92(3)°,Z=2,Dc=2.100 Mg/m3,F(000)=1 534,R1 =0.061 5,wR2=0.1752. 3个配合物的晶体结构类似,均为无限链状分子,配合物中稀土离子均为九配位的单帽四方反棱柱配位多面体. 配位羧基氧原子与中心金属离子的平均键长从Nd 到Er配合物随着稀土原子序数的增大而缩短. 抑菌实验表明,配合物的抑菌效果明显好于配体.
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