两个一维镁配位聚合物的合成、晶体结构和荧光性质

本文以Mg(NO3)2.6H2O分别与4,5-咪唑二羧酸(4,5-imidazoledicarboxylic acid,H3imdc)和3,5-吡唑二羧酸(3,5-pyrazoled-icarboxylic acid,H3pdc)通过水热反应合成了2个新型镁的一维配位聚合物[Mg(Himdc)(DMF)(H2O)]n(1)和[Mg(Hpdc)(H2O)2]n(2),并对配位聚合物1和2进行了元素分析、FTIR、热重分析和X-射线单晶结构解析等表征。X-射线单晶结构解析表明配位聚合物1和2的晶体分别属于正交晶系与单斜晶系,空间群分别为P212121和P21/c。配合物1为一维Z字型链状结构,配合物2为一维线型链状结构,2个配合物中的链与链之间均通过氢键相互作用堆积成三维结构。对1和2进行固态荧光光谱分析,结果显示,1和2的荧光发射峰与各自的配体的荧光发射峰峰形一致,说明2个配合物的荧光发射峰应归属于各自配体内的π→π*电子跃迁。

Synthesis, Crystal Structures and Fluorescence Property of Two One-Dimensional Coordination Polymers of Magnesium

Two one-dimensional coordination polymers [Mg(Himdc)(DMF)(H2O)]n(1) and [Mg(Hpdc)(H2O)2]n(2) have been hydrothermally synthesized by the reactions of Mg(NO3)2·6H2O and 4,5-imidazoledicarboxylic acid or 3,5-pyrazoledicarboxylic acid,and characterized by elemental analysis,FTIR,thermal gravimetric analysis and X-ray diffraction single-crystal structural analysis.Two compounds crystallize in the orthorhombic and monoclinic,space group P212121 and P21/c for 1 and 2,respectively.Compound 1 shows one-dimensional zigzag chain structure,compound 2 shows one-dimensional linear chain structure,the chain and chain of 1 and 2 are both connected by hydrogen bonds to form three-dimensional structure.The fluorescence spectra of 1 and 2 were measured,the luminescence behaviors probably results from π→π* electronic transition of the respective ligand.