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化学学报
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化学学报 ›› 2004, Vol. 62 ›› Issue (16): 1539-1543. 上一篇    下一篇

研究论文

Eu(DBM)3qp和Eu(DBM)3pp的晶体结构及荧光性质对比研究

王志强, 杜晨霞, 朱卫国, 吴养洁   

  1. 郑州大学化学系, 郑州, 450052
  • 投稿日期:2003-12-02 修回日期:2004-04-27 发布日期:2014-02-17
  • 通讯作者: europium complex,crystal structure,fluorescence,π2πstacking
  • 作者简介:杜晨霞:E-mail:dcx@zzu.edu.cn;Tel:0371-7763390;Fax:0371-7763390.
  • 基金资助:
    河南省杰出青年基金(No.0312000700)资助项目.

Comparative Study on the Crystal Structures and Fluorescent Properties of Eu(DBM)3qp and Eu(DBM)3pp

WANG Zhi-Qiang, DU Chen-Xia, ZHU Wei-Guo, WU Yang-Jie   

  1. Department of Chemistry, Zhengzhou University, Zhengzhou 450052
  • Received:2003-12-02 Revised:2004-04-27 Published:2014-02-17

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两种新型铕配合物Eu(DBM)3qp(DBM=二苯甲酰甲烷,qp=喹喔啉并[2,3-i]-1,10-邻二氮杂菲)和Eu(DBM)3pp(DBM=二苯甲酰甲烷,pp=吡嗪并[2,3-i]-1,10-邻二氮杂菲)的晶体结构均属单斜晶系,P2(1)/c空间群.中心铕离子分别与DBM配体的六个氧原子及第二配体的两个鳌合氮原子配位,形成八配位的扭曲四方反棱柱构型.两种配合物晶体中,每四个配合物分子的第二配体共轭平面相互平行,形成一种特殊的"块"状π-π堆积单元.在紫外光激发下两种配合物均表现为Eu3+的特征发射,由于第二配体能级的不同,Eu(DBM)3pp的发射强度比Eu(DBM)3qp高十几倍.

关键词: 铕配合物, 晶体结构, 荧光, π-π堆积

Two new europium complexes Eu(DBM)3qp (DBM=dibenzoylmethane, qp=quinoxalino[2,3-i]-1,10-phenathroline) and Eu(DBM) 3pp (DBM=dibenzoylmethane, pp=pyrazino[2,3-i]-1,10-phenathroline) were synthesized and characterized by X-ray diffraction.Both of these complexes crystallized in monoclinic system with space group P2(1)/c.Each Eu3+ is eight coordinated with six oxygen atoms from three DBM ligands and two nitrogen atoms from netural ligand, forming a distorted square antiprism.In the crystals of those complexes, every four complex molecules form a block through strong intermolecular π-π stacking interactions between neutral ligands.The emission intensity of Eu(DBM)3pp is about twelve times of that of Eu(DBM)3qp, which results from the distinction of energy level between the second ligands.

Key words: europium complex, crystal structure, fluorescence, π-πstacking