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合成了一种新的双核倒反中心的稀土镧配合物{La[o-C6H4(NO2)(CO2)]3.(DMF)2}2.通过元素分析、核磁共振谱和红外光谱对配合物的组成和结构进行了表征,用热重分析研究了该配合物的热稳定性,用X射线单晶衍射法测定了其晶体结构.镧配合物{La[o-C6H4(NO2)(CO2)]3.(DMF)2}2晶体属三斜晶系,空间群P1,晶胞参数a=1.902(2)nm,b=1.245 0(2)nm,c=1.298 7(2)nm,α=64.555(2),°β=66.348(2),°γ=71.920(2)°,V=1.569 5(5)nm3,Dc=1.658 Mg/m3,Z=2,μ=1.437 mm-1,F(000)=784.配合物中有2个La(Ⅲ)被4个邻硝基苯甲酸的羧酸根的负氧离子桥联,每个La(Ⅲ)的中心离子配位数为9,配位原子分别来自于7个邻硝基苯甲酸的羧酸根的负氧离子和2个DMF的羰基氧原子.化合物中的氢键和π…π堆积作用使其成为三维立体结构.同时发现了标题化合物固体具有光致发光现象,发光性能测试表明,配合物具有很好的荧光性质.
A new double nucleus inverted center lanthanum complex {La [o-C6H4 (NO2) (CO2)] 3. (DMF) 2} 2 has been synthesized by the elemental analysis, NMR and IR spectra. The thermal stability of the complex was investigated by thermogravimetric analysis and its crystal structure was characterized by X-ray single crystal diffraction.The lanthanum complex {La [o-C6H4 (NO2) (CO2) ] 3. The (3) (DMF) 2} 2 crystals belong to the triclinic system with a space group of P1 with a = 1.902 (2) nm and b = 1.245 0 = 64.555 (2), ° β = 66.348 (2), ° γ = 71.920 (2) °, V = 1.569 5 (5) nm3, Dc = 1.658 Mg / F (000) = 784. Two La (Ⅲ) complexes were bridged by the negative oxygen ions of the carboxylates of 4 o-nitrobenzoic acids. The central ion coordination number of each La (Ⅲ) The coordination atoms come from the negative oxygen ions of carboxylates of 7 o-nitrobenzoic acids and the carbonyl oxygen atoms of 2 DMFs respectively and the hydrogen bond and π ... π stacking effect make them into three-dimensional structure. The title compound has photoluminescence. The luminescent properties show that the complex has good fluorescence properties.