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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (8): 667-672. 上一篇    下一篇

研究论文

稀土配合物[Nd(o-NO2-C6H4COO)3(DMF)2]2的合成及其晶体结构

赵丽芳, 陈亚芍*   

  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)
  • 投稿日期:2006-08-31 修回日期:2006-12-05 发布日期:2007-04-28
  • 通讯作者: 陈亚芍

Synthesis and Crystal Structure of Rare Earth Complex [Nd(o-NO2-C6H4COO)3(DMF)2]2

ZHAO Li-Fang; CHEN Ya-Shao*   

  1. (Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062)
  • Received:2006-08-31 Revised:2006-12-05 Published:2007-04-28
  • Contact: CHEN Ya-Shao

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合成了一种新的双核倒反中心的稀土钕配合物[Nd(o-NO2-C6H4COO)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- NO2-C6H4COO)3(DMF)2]2晶体属三斜晶系, 空间群P-1, 晶胞参数a＝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) nm3, Dc＝2.167 mg/m3, Z＝2, μ＝3.415 mm－1, F(000)＝986. 配合物中每个Nd(Ш)被4个邻硝基苯甲酸根桥联, Nd(Ш)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.

关键词: 钕配合物, 合成, 晶体结构, 荧光

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, α＝64.220 (1)°, β＝66.306 (1)°, γ＝71.825 (1)°, V＝1.5645 (3) nm3, Dc＝2.167 mg/m3, 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.

Key words: neodymium complex, synthesis, crystal structure, fluorescence