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采用水热方法合成出一种新型的间硝基苯甲酸稀土配位聚合物[Nd2(C7H4O4N)7H2O]n,并通过元素分析、红外光谱、X射线单晶结构分析对该配位聚合物进行了表征.标题配位聚合物的晶体属于三斜晶系,P1空间群,晶胞参数a=0.984 8(2)nm,b=1.131 4(2)nm,c=1.366 3(3)nm,α=69.22(3),°β=82.48(3)°,γ=82.21(3)°,V=1.404 5(5)nm3,Dc=1.806 g/cm3,Z=1.结构分析表明:标题化合物是由稀土金属Nd(Ⅲ)和间硝基苯甲酸组成的配位聚合物,此聚合物通过Ln—O—C—O—Ln形成无限一维链状结构,进一步又通过分子间氢键连接形成复杂的三维氢键网络结构.
A new type of rare earth coordination polymer of m-nitrobenzoate [Nd2 (C7H4O4N) 7H2O] n was synthesized by hydrothermal method. The coordination polymer was characterized by elemental analysis, infrared spectrum and X-ray single crystal structure The crystal of the title coordination polymer belongs to the triclinic system with P1 space group, the unit cell parameters are a = 0.984 8 (2) nm, b = 1.131 4 (2) nm and c = 1.366 3 α = 69.22 (3), ° β = 82.48 (3) °, γ = 82.21 (3) °, V = 1.404 5 (5) nm3, Dc = 1.806 g / cm3, Z = 1. The structural analysis showed that the title compound Is a coordination polymer composed of rare earth metal Nd (III) and m-nitrobenzoic acid. The polymer forms an infinite one-dimensional chain structure by Ln-O-C-O-Ln and is further connected by an intermolecular hydrogen bond Form a complex three-dimensional hydrogen bond network structure.