基于混合官能团配体一维链状Gd配位聚合物的合成、晶体结构及性质

以Gd(NO3)2·6H2O和5-磺酸基间苯二甲酸单钠盐为原料,通过水热反应合成得到配位聚合物Gd(SO3-DCB)(H2O)5]n(1)(NaH2SO3-DCB=5-磺酸基间苯二甲酸单钠盐)。单晶X射线衍射结果表明,化合物1属单斜晶系,P21/n空间群。Gd离子是九配位的,呈扭曲的单冠四方反棱柱配位构型。SO3-DCB^3-配体的两个羧基螯合配位Gd离子,形成一维链状结构。化合物1的荧光发射峰在421nm,是配体中苯环结构的特征发射峰。磁性测试表明,化合物1中的Gd离子之间存在铁磁耦合作用。

Synthesis,crystal structure and properties of one-dimensional chain Gd coordination polymer based on the ligand with mix-functional groups

The coordination polymerGd(SO3-DCB)(H2O)5]n(1)(NaH2SO3-DCB=5-sulfonylisophthalic acid monosodium salt)was synthesized by hydrothermal reaction with Gd(NO3)2·6H2O and NaH2SO3-DCB.The result of single crystal X-ray diffraction shows that compound 1 belongs to monoclinic system and P21/n space group.Gd ion is nine-coordinated with a distorted single crown tetragonal antipyramid configuration.Two carboxylate groups of the SO3-DCB^3-ligands chelate two Gd ions to form a one-dimensional chain structure.The fluorescence emission peak of compound 1 is at 421 nm,which is the characteristic emission of benzene ring in the ligand.Magnetic measurement shows that there is the weak ferromagnetic coupling between Gd ions in compound 1.