基于修饰的咪唑羧酸配体3d-4f框架化合物的合成、结构表征

摘要

在水热条件下，硝酸铒、硝酸钴和被修饰的咪唑二羧酸刚性配体反应，得到一个异核金属有机骨架化合物，其化学式为[Er2Co2（μ3－Hmimda）2（μ3－mimda）2·4H2O]n·2nH2O，（其中H3mimda代表1H－2－methyl－4，5－imidazole－dicarboxylic acid）．X－ray单晶衍射分析表明，它属于单斜晶系， C2／c点群，具有波纹状的二维层状结构，二维层状结构再通过分子间作用力形成三维网格状的微孔结构．荧光测试显示，标题化合物在近红外区域显示饵（ III）离子的特征发射荧光．%A heteronuclear metal organic framework ( MOF ) containing erbium ( III ) and cobalt ( II ) ion based on a rigid ligand of substituted imidazoledicarboxylic acid has been synthesized and characterized systemati -cally.It’s formula is [Er2Co2(μ3-Hmimda)2(μ3-mimda)2· 4H2O]n· 2nH2O, (H3mimda =1H-2 -methyl-4, 5 -imidazole-dicarboxylic acid ) .The complex crystallizes in the monoclinic system .It possesses an extended grid-like porous structure constructed from corrugated shaped 2D layer.The title compound shows the characteristic e-missions in the near infrared region based on Er ( III) ion.