高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (9): 1195.

• 研究论文 • 上一篇    下一篇

双核铕-间甲基苯甲酸邻菲罗琳[Eu(m-MBA)3PHEN](H2O)2三元配合物的晶体结构和荧光光谱

金林培1, 王瑞芬1, 王明昭1, 蔡冠梁2, 刘世雄2, 黄金陵2   

  1. 1. 北京师范大学化学系, 北京 100875;
    2. 福州大学化学系
  • 收稿日期:1993-02-23 修回日期:1993-05-05 出版日期:1993-09-24 发布日期:1993-09-24
  • 通讯作者: 金林培
  • 作者简介:第一作者:男, 53岁, 副教授.
  • 基金资助:

    国家基础性研究重大项目;福州结构化学国家重点实验室基金

Crystal Structure and Luminescence Spectra of Binuclear Europium m-Methylbenzoate Ternary Complex with 1,10-phenanthroline, [Eu(m-MBA)3PHEN](H2O)2

JIN Lin-Pei1, WANG Rui-Fen1, WANG Ming-Zhao1, CAI Guan-Liang2, LIU Shi-Xiong2, HUANG Jin-Ling2   

  1. 1. Department of Chemistry, Beijing, Normal University, Beijing, 100875;
    2. Department of Chemistry, Fuzhou University
  • Received:1993-02-23 Revised:1993-05-05 Online:1993-09-24 Published:1993-09-24

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摘要： 标题配合物晶体属Cc空间群,a=1.5955(6)nm,b=1.8508(6)nm,c=2.2595(9)nm,β=97.79(4)°,Z=4,Dx=1.52g/cm3,T=295K.用I>3σ(I)的7316个可观察衍射数据对92个非氢原子的原子坐标和各向异性温度因子进行全矩阵最小二乘法精修,最终的偏离因子R=0.043.中心Eu(Ⅲ)离子与周围6个氧和一对氮原子配位,配位多面体属四方反棱柱体,其点对称性为C1.以Eu(Ⅲ)离子为荧光探针,77K下测得配合物多晶样品的高分辨激光激发光谱和发射光谱,激发光谱表明配合物中Eu(Ⅲ)离子仅有一种晶格格位.5D0→7FJ(J=0～2)跃迁光谱表明中心Eu(Ⅲ)离子在77K下具有C1对称性.

关键词: 铕, 三元配合物, 晶体结构, 荧光光谱

Abstract: The crystal structure of the title compound has been solved by the heavy-atom, direct method, and by using the three dimensional Patterson-Fourier synthesis.The crystallographic data are:M=1511.22, space group Cc, a=l.5955(6) nm, b=1.8508(6) nm, c=2.2595(9) nm, β = 97.79(4)°, V = 6.610(4) nm3, Z = 4, F(000) = 3040, Dx=1.52 g/cm3, μ=19.47 cm-1, and R = 0.043 for 7316 observed reflections.Both europium ions in the binuclear complex are octa-coordinated with six oxygen atoms of m-methylbenzoates and two nitrogen atoms of 1, 10-phenathroline, to give the square antiprisms with C1 site symmetry for the Eu(Ⅲ) ions.The high resolution excitation spectrum at 77Kindicates that only one Eu(Ⅲ) site exists in the complex.5D0→7FJ(J=0-2) transition fluorescence spectra confirm the C1 symmetry of the Eu(Ⅲ) site.

Key words: Europium, Ternary complex, Crystal structure, Luminescence spectra

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