以5-甲基-3-吡唑甲酸为配体的钴(Ⅱ)、镍(Ⅱ)配合物的合成、晶体结构和性质（英文）

Syntheses,Crystal Structures and Properties of Cobalt(Ⅱ) and Nickel(Ⅱ) Complexes Based on 5-Methyl-1H-pyrazole-3-carboxylic Acid Ligand

以5-甲基-3-吡唑甲酸(H2MPCA)为主配体,桥联配体4,4′-联吡啶(4,4′-bpy)和吡嗪(pyz)为辅助配体,合成了2个新的配合物{[Co(HMPCA)2(4,4′-bpy)]2·5H_2O}n(1)和{[Ni(HMPCA)2(pyz)]·5H_2O}n(2),并用元素分析、红外光谱、X射线单晶衍射结构分析、热重分析等对其进行了表征。配合物1属于正交晶系,空间群为Pccn,配合物2属于单斜晶系,空间群为P2/c。在1和2中,金属离子都位于一个扭曲的八面体配位环境中,分别由4,4′-联吡啶(1)和吡嗪(2)两端的氮原子桥联2个相邻的金属离子,形成一维链状聚合物。考察了配合物1和2的热稳定性、荧光性能和磁性。

Two new 1D chain-typed coordination polymers, {[Co（HMPCA）2（4,4＇-bpy）]25H2O}n （1） and {[Ni（HMPCA）2（pyz）]5H2O}n（2） （H2MPCA=5-methyl-1H-pyrazole-3-carboxylic acid, 4,4＇-bpy=4,4＇-bipyridine, pyz=pyrazine）, have been synthesized and characterized by elemental analysis, IR spectra, single crystal X-ray diffraction and thermogravimetric analysis. Complex 1 crystallizes in the orthorhombic system, space group Pccn, and 2 crystallizes in the monoclinic system, space group P2/c. In 1 and 2, metal ions are both located in an octahedral geometry, coordinated by two nitrogen atoms and two oxygen atoms from two HMPCA-anions, and linked by two nitrogen atoms from 4,4＇-bpy ligands （1） and pyz ligands （2）, respectively, forming a 1D chain-typed coordination polymer. The thermal stability, luminescent properties and magnetic properties of them have also been investigated.