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以2,4,6-吡啶三甲酸(H3ptc)和六水合高氯酸镍为原料用水热方法合成了三维超分子配合物[Ni(H2O)6]1.5.[Ni(ptc)(Hptc)].(H2O)4,并经X射线衍射分析确定了其单晶结构.该晶体属三斜晶系,P墿空间群,晶胞参数为:a=1.03058(16)nm,b=1.11852(17)nm,c=1.4689(2)nm,α=74.725(2)°,β=77.777(2)°,γ=64.734(2)°,V=1.4675(4)nm3,Mr=798.20,Z=2,ρ=1.806g/cm3,F(000)=822,μ=1.701mm-1,R1=0.0373,wR2=0.0993.结果表明,在组成该超分子体系的基本结构单元[Ni(ptc)(Hptc)]3-和[Ni(H2O)6]2+中,Ni(Ⅱ)离子均处于变形八面体配位环境中.配合物单元之间通过氢键相互连接,形成了无限延伸的三维超分子网状结构.
A novel three dimensional supramolecular complex [Ni (H2O) 6] 1.5 [Ni (ptc) (Hptc)] was synthesized by hydrothermal method from 2,4,6-pyridinetricarboxylic acid (H3ptc) and nickel perchlorate hexahydrate (H2O) 4, and its single crystal structure was confirmed by X-ray diffraction analysis.They are triclinic and P 墿 space group with unit cell parameters of a = 1.03058 (16) nm and b = 1.11852 ), c = 1.4689 (2) nm, α = 74.725 (2) °, β = 77.777 (2) °, γ = 64.734 (2) °, V = 1.4675 (4) nm3, Mr = 798.20, Z = 2 (ρ = 1.806g / cm3, F (000) = 822, μ = 1.701mm-1, R1 = 0.0373, wR2 = 0.0993). The results show that in the supramolecular system [Ni (ptc) )] 3- and [Ni (H2O) 6] 2+, the Ni (Ⅱ) ions are in the deformed octahedral coordination environment, and the unit of the complexes are connected by hydrogen bonds to form an infinitely extended three-dimensional supramolecular grid.