高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (7): 1110.

• 论文 • 上一篇    下一篇

Eu2(3,4-DMBA)6(PHEN)2的晶体结构及HRS研究

王利亚1, 郑向军1, 金林培1, 吕少哲2   

  1. 1. 北京师范大学化学系, 北京 100875;
    2. 中国科学院激发态物理开放实验室, 长春物理所, 长春 130021
  • 收稿日期:1998-08-03 出版日期:1999-07-24 发布日期:1999-07-24
  • 通讯作者: 金林培
  • 作者简介:王利亚,男,43岁,教授,洛阳高等师范专科学校访问学者.
  • 基金资助:

    国家自然科学基金(批准号:29671003);攀登计划预选项目

Crystal Structure and HRS Study of Eu2(3,4-DMBA)6(PHEN)2

WANG Li-Ya1, ZHENG Xiang-Jun1, JIN Lin-Pei1, LU Shao-Zhe2   

  1. 1. Chemistry Department, Beijing Normal University, Beijing, 100875;
    2. Laboratory of Excited State Physics, Institute of Changchun Physics, Chinese Academy of Sciences, Changchun, 130021
  • Received:1998-08-03 Online:1999-07-24 Published:1999-07-24

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摘要： 合成了铕(Ⅲ)与3,4-二甲基苯甲酸(3,4-HDMBA)、邻菲咯啉(PHEN)形成的晶体配合物Eu2(3,4-DMBA)6(PHEN)2测定其分子量M=1559.35,晶体属三斜晶系,P1空间群,a=1.2665(4)nm,b=1.3567(4)nm,c=1.0755(4)nm,α=98.87(3)°,β=108.25(3)°,γ=87.98(2)°,Z=1,最终的偏离因子R=0.031.以Eu(Ⅲ)离子为荧光探针,在77K下测定了配合物的高分辨光谱(HRS).铕配合物的激发光谱、发光光谱、时间分辨光谱和发光寿命测定结果表明,该配合物中存在两种化学环境不同的Eu(Ⅲ)离子格位.

关键词: 铕, 三元配合物, 晶体结构, 荧光光谱

Abstract: An europium complex of 3,4-HDMBA and PHEN, Eu2(3,4-DMBA)6(PHEN)2was synthesized. The complex crystallizes in triclinic system, space group P1 with a=1.2665(4) nm, b=1.3567(4) nm, c=1.0755(4) nm, α=98.87(3)°, β=108.25(3)°, γ=87.98(2)°, Z=1, R=0.031, M=1559.35. Bonding around each europium consists of two oxygen atoms from the bidentate chelated 3,4-DMBA, four oxygen atoms from four bridging 3,4-DMBA groups and two nitrogen atoms of a 1,10-phenanthroline molecule. The two europium atoms are bridged by the tetrakis(carboxylato-O,O′) groups forming a dimer. Its high resolution spectra(HRS) were observed at 77K with the Eu(Ⅲ) ion as the fluorescence probe. The results of its excitation spectra, emission spectra, time resolution spectra and emission lifetime show that there exist two Eu(Ⅲ) ion sites in the complex.

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

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