【摘要】 报道了单晶Pr(C8H5NO4) 1 5·H2 O的水热合成和晶体结构。中心离子Pr3 +处于 9配位的环境中。来源于配体的两个羧基螯合Pr3 +形成两个四元环。其它四个羧基通过桥键连接中心离子。晶体数据如下 :正交晶系 ,空间群Pbcn ,a =1 2 2 2 2 8( 7)nm ,b =0 80 2 95 ( 5 )nm ,c =2 5 61 1 1 ( 1 4)nm ,α =90°,β=90°,γ=90°。配体通过螯合和桥键金属离子在ac平面内构成地板形网格。羧基采用 η1,3 方式连接层平面 ,沿着b轴构成一维通道。与金属离子配位的水分子悬挂在隧道中更多还原

【Abstract】 The hydrothermal synthesis and the structure of the crystal Pr(C 8H 5NO 4) 1 5 ·H 2O are reported in this paper. The metal ion center Pr 3+ is in nine coordination environment. Two carboxyl groups from ligands chelate Pr 3+ ion to form two four membered rings, and the rest four carboxyl groups bridge the metal ion center. Crystal data are as follows: Orthorhombic system, space group P bcn, a =1 22228(7) nm, b =0 80295(5) nm, c =2 56111(14) nm, α =90°, β =90°, γ =90°. The ligands construct a floor like layer by chelating and bridging metal ions. The carboxyl groups link layers in η 1,3 mode, thus resulting in one dimension channels along b axis, and the water molecules coordinating with metal ions are pending in these channels.更多还原