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采用水热方法合成了镍(Ⅱ)/2,4,6-吡啶三酸(H3L=2,4,6-pyridinetricarboxylic acid)的配合物(1);利用红外光谱和单晶X射线衍射表征了其晶体结构.配合物1属三斜晶系,P-1空间群,晶胞参数为:a=1.020 27(15)nm,b=1.112 93(17)nm,c=1.461 6(2)nm,α=75.026(3)°,β=78.291(2)°,γ=65.384(2)°,V=1.449 0(4)nm3,Z=2.配合物中的镍(Ⅱ)离子处于两种不同的配位环境.其中部分镍(Ⅱ)离子与配体中的两个羧基及氮原子配位,其余的镍(Ⅱ)离子与六个水分子配位;而配体吡啶环上的4-位羧基未与Ni(Ⅱ)离子配位.与此同时,配合物中形成复杂的氢键,通过氢键连接形成三维结构.
The complex (1) of nickel (Ⅱ) / 2,4,6-pyridinetricarboxylic acid (H3L = 2,4,6-pyridinetricarboxylic acid) was synthesized by hydrothermal method and characterized by IR and single crystal X-ray diffraction Its crystal structure is as follows: The complex 1 belongs to the triclinic system with P-1 space group and the unit cell parameters are: a = 1.020 27 (15) nm, b = 1.112 93 , α = 75.026 (3) °, β = 78.291 (2) °, γ = 65.384 (2) °, V = 1.449 0 (4) nm3 and Z = 2. The Ni (Ⅱ) Different coordination environment, some of the nickel (Ⅱ) ions coordinate with two carboxyl and nitrogen atoms in the ligand, and the rest of the nickel (Ⅱ) ions coordinate with six water molecules; while the 4 - carboxyl carboxyl group is not coordinated with Ni (Ⅱ) ions, meanwhile, complex hydrogen bonds are formed in the complex, and the three-dimensional structure is formed by hydrogen bonding.