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科学通报  2011 

稀土双系列多金属氧酸盐和草酸桥连二核铜构筑的无机-有机杂化物及磁性质

, PP. 908-913

Keywords: 多金属氧酸盐,无机-有机杂化物,二核铜,稀土,磁性质

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Abstract:

在醋酸-醋酸钾缓冲溶液中,一系列基于稀土双系列锗钨酸盐的无机-有机杂化物K2NamH9-m[{Ln(GeW11O39)2}{Cu2(bpy)2(μ-ox)}]·nH2O(bpy=2,2′-联吡啶,ox=C2O42-;Ln=La,Nd,Sm,Eu,Gd;n=19,17,22,20,19;m=4,4,4,9,2)被分离出来.单晶X射线分析表明,化合物1~5是同构的,均具有一维链状结构,由草酸二核铜[Cu2(2,2-bpy)2(μ-ox)]2+配离子桥连稀土双系列多阴离子[Ln(GeW11O39)2]13-构建而成.相邻链之间通过吡啶基团的π-π相互作用,进一步形成三维结构.磁性测试显示这些化合物具有二核铜的反铁磁性相互作用,同时稀土离子对化合物磁性有一定影响.

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