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机构地区:[1]陕西师范大学化学与材料科学学院应用表面与胶体化学教育部重点实验室,西安710062
出 处:《化学学报》2007年第8期667-672,共6页Acta Chimica Sinica
基 金:陕西省西安市科技攻关(No.GG04155)资助项目。
摘 要:合成了一种新的双核倒反中心的稀土钕配合物[Nd(o-NO_2-C_6H_4COO)_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的结构,钕配合物[Nd(o-NO_2-C_6H_4COO)_3(DMF)_2]_2晶体属三斜晶系,空间群P-1,晶胞参数α=1.18652(12)nm,b= 1.24784(13)nm,c=1.29958(13)nm,α=64.220(1)°,β=66.306(1)°,γ=71.825(1)°,V=1.5645(3)nm^3,D_c=2.167 mg/m^3,Z=2,μ=3.415mm^(-1),F(000)=986.配合物中每个Nd(Ⅲ)被4个邻硝基苯甲酸根桥联,Nd(Ⅲ)的配位数为8,配位原子分别来自于5个邻硝基苯甲酸羧酸根的6个氧原子和2个DMF的羰基氧原子.配合物中的氢键和π…π堆积作用使其成为三维立体结构,同时发现了标题配合物固体具有光致发光现象,发光性能测试表明该配合物具有很好的荧光性质。The title complex [Nd(o-NO2-C6H4COO)3(DMF)2]2 has been synthesized by the reaction of Nd(NO3)3 ·nH2O with o-nitrobenzoic acid (C7H5O4N) and N,N-dimethylformamide (DMF). The complex resides on an inversion center. The structure of the complex was characterized by the method of IR, ^1H NMR, UV, elemental analysis, fluorescent emission spectroscopy and X-ray single crystal diffraction. The results show that the complex crystallizes in a triclinic system, space group P-1 with cell parameters a= 1.18652(12) nm, b= 1.24784(13) nm, c =1.29958(13) nm, a=64.220 (1)°,β=66.306 (1)°, γ=71.825 (1)°, V=1.5645 (3) nm^3, Dc=2.167 mg/m^3, Z=2, μ=3.415 mm^-1 and F(000)=986. Each Nd(Ⅲ) atom is bridged by four o-nitrobenzoates and chelated by one o-nitrobenzoate. The Nd(Ⅲ) atom is eight-coordinated by six oxygen atoms from five o-nitrobenzoates and two oxygen atoms from two DMF molecules. Hydrogen bonds and aromatic π***π stacking interactions assemble the title complex into a three dimensional network. Luminescence measurement shows that the complex emits fluorescence.
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