一维链状镍配位聚合物{Ni(DNBC)2(Im)(H2O)·0.25H2O}n的合成、晶体结构及热学性质研究

摘要

The complex {[Ni(DNBC)2 (Im) (H2O)] ·0.25H2O}n (DNBC =3,5-dinitrobenzoic acid, Im =imidazole) was synthesized in water-ethyl alcohol mixture solution and characterized by elemental analysis, IR and thermo-gravimetry (TG). Its crystal structure was determined by single crystal X-ray diffraction. The complex crystallized crystallizes in the Orthorhombic system with space group Pbca,a= 1.502 2(6) nm, 6=1.5146(6) nm, c=1.9269(7) nm, K =4.384(3) nm3, Z=8, F(000)=2 320. The crystal structure shows the complex has a ID chain networks, where each Ni(Ⅱ) is in 40+N coordination modes, each five-coordinated Ni(Ⅱ) ions form a distorted square-pyramidal geometry, oxygen atoms occupy axial center positions. CCDC: 783800.%在水和乙醇混合溶液中合成了配合物{[Ni(DNBC)2(Im)(H2O)]· 0.25H2O}n(DNBC=3,5-二硝基苯甲酸,Im=咪唑),并进行了元素分析、红外光谱、热重分析(TG)对其进行了表征,用单晶X-射线衍射测定了配合物的晶体结构.结果表明此配合物属正交晶系,空间群为Pbca,a=1.502 2(6) nm,b=1.5146(6) nm,c=1.926 9(7) nm,V=4.384(3)nm3,Z=8,F(000)=2 320.配合物中金属镍原子采用五配位,分别与4个氧原子和1个咪唑氮原子配位,形成1个扭曲的四方锥体.