4,4′-联吡啶调控的两个2,4-二氯苯甲酸基钐配位聚合物的合成、结构和磁性

Syntheses,structures and magnetic properties of two 2,4-dichlorobenzoate-based samarium coordination polymers tuned by 4,4′-bipyridine

在溶剂热条件下,将2,4-二氯苯甲酸(2,4-HDCB)与Sm(NO3)3·6H2O和NaOH反应合成了一个稀土-有机配位聚合物(CP)[Sm(2,4-DCB)3(CH3CH2OH)2](1)。当引入第二配体4,4′-联吡啶(4,4′-bpy)时,一个新的稀土-有机CP[Sm2(2,4-DCB)6(4,4′-bpy)(H2O)2](2)被获得。通过单晶X-射线衍射、红外、PXRD和TG分析对配合物1和配合物2进行表征。在配合物1中,2,4-DCB阴离子桥接Sm(III)离子形成一维(1D)链。在配合物2中,6个2,4-DCB阴离子连接2个Sm(III)离子形成双核Sm2(2,4-DCB)6单元,4,4′-bpy共配体连接Sm2(2,4-DCB)6单元形成1D链。研究了配合物1和配合物2的磁性。

By reacting 2,4-dichlorobenzoic acid(2,4-HDCB)with Sm(NO3)3·6H2O and NaOH,the lanthanide-organic coordination polymer(CP)[Sm(2,4-DCB)3(CH3CH2OH)2](1)has been solvothermally synthesized.When the second ligand 4,4′-bipyridine(4,4′-bpy)was introduced,the new lanthanide-organic CP[Sm2(2,4-DCB)6(4,4′-bpy)(H2O)2](2)was obtained.CPs complexes 1 and 2 have been characterized by single-crystal X-ray diffraction,IR,PXRD and TG analyses.In complex 1,the Sm(III)ions are bridged by the 2,4-DCB anions to form a one-dimensional(1D)chain.In complex 2,two Sm(III)ions are linked by six 2,4-DCB anions to form a binuclear Sm2(2,4-DCB)6 unit,and then the 4,4′-bpy co-ligands connect the Sm2(2,4-DCB)6 units to generate a 1D chain.The magnetic properties of complexes 1 and 2 were investigated.