高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (3): 305.

• 研究论文 • 上一篇    下一篇

Eu(DBM)3(2,2'-bipy)的晶体结构和荧光光谱

王明昭1, 金林培1, 刘世雄2, 蔡冠梁2, 黄金陵2, 秦伟平3, 黄世华3   

  1. 1. 北京师范大学化学系, 北京 100875;
    2. 福州大学化学系;
    3. 中国科学院长春物理研究所
  • 收稿日期:1992-06-05 修回日期:1992-10-06 出版日期:1993-03-24 发布日期:1993-03-24
  • 通讯作者: 王明昭
  • 基金资助:

    国家自然科学基金;中国科学院长春物理研究所激发态物理研究开放实验室基金

Crystal Structure and Fluorescent Spectra of Eu(DBM)3(2,2'-bipy) Complex

WANG Ming-Zhao1, JIN Lin-Pei1, LIU Shi-Xiong2, CAI Guan-Liang2, HUANG Jin-Ling2, QIN Wei-Ping3, HUANG Shi-Hua3   

  1. 1. Department of Chemistry, Beijing Normal University, Beijing, 100875;
    2. Department of Chemistry, Fuzhou University;
    3. Changchun Physics Institute, Chinese Academy of Sciences
  • Received:1992-06-05 Revised:1992-10-06 Online:1993-03-24 Published:1993-03-24

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摘要： Eu(C15H12O2)3(C10H3N2).分子量M=1103.03.空间群P21/c,a=1.3309(4)nm.b=2.2473(5)nm,c=1.6231(1)nm,β=109.68(1)°,V=4.571(2)nm3,Z=4,Dx=1.43g·cm-3.用5590个可观察衍射点对64个非氢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=0.046.中心离子Eu(Ⅲ)由DBM配体的6个氧原子和2,2'-bipy的2个氮原子螫合配位,配位多面体为畸变的四方反棱柱体.利用标题化合物能发生较强荧光的特性,以Eu(Ⅲ)离子为荧光探针,77K下测定了配合物的高分辨激光激发和发射光谱.结果表明,配合物中Eu(Ⅲ)离子仅有一种晶格格位,6Do→7Fj(J=0～2)跃迁光谱和晶体结构表明中心离子具有C1格位对称性。

关键词: 铕, 三元配合物, 晶体结构, 荧光光谱

Abstract: Eu(C15H12O2)3(C10H8N2), M=1103.03, belongs to monoclinic system with space group P21/c, α=l.3309(4) nm, b=2.2473(5) nm, c= 1.6231(1) nm, β=109.68(1)°, K=4.571 (2) nm3, Z=4, Dx= 1.43 g·cm-3, λ(MoKα) = 0.071069 nm, μ=14.24 cm-1, F(000) = 2004, T=295K.The structure was solved by heavy-atom method and refined by full-matrix least-squares technique for 64 non-hydrogen atoms anisotropically for 5590 reflections with I>3σ(I).The final Ris 0.046.The metal atom in the monomeric molecule is coordinated by six Oatoms of DBMligands and two Natoms of 2,2' -bipy to form a distorted square antiprism.Eu( Ⅲ ) ion as luminescent probe features a high sensitivity and easily interpretable spectra by the selective laser excitation.High resolution laser excitation and emission spectra were recorded at 77K.An unique peak at 17237 cm-1 indicating only one Eu( Ⅲ ) ion site in the title complex was observed.Spectra of 6Do→7Fj(J= 0-2) transitions show that the symmetry for Eu( Ⅲ ) site is C1 which is in agreement with the result of crystal structure determination.

Key words: Europium ternary complex, Crystal structure, Fluorescent spectra

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