Eu(DBM)_(3qp)和Eu(DBM)_(3pp)的晶体结构及荧光性质对比研究  

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

作　　者：王志强[1] 杜晨霞[1] 朱卫国[1] 吴养洁[1] 

机构地区：[1]郑州大学化学系,郑州450052

出　　处：《化学学报》2004年第16期1539-1543,共5页Acta Chimica Sinica

基　　金：河南省杰出青年基金 (No.0 31 2 0 0 0 70 0 )资助项目

摘　　要：两种新型铕配合物Eu(DBM ) 3 qp (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) 3 pp(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) 3 pp的发射强度比Eu(DBM) 3Two new europium complexes Eu (DBM)(3)qp (DBM=dibenzoylmethane, qp=quinoxalino [2,3-i]-1,10-phenathroline)and Eu(DBM)(3) pp (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 netura ligand, forming a distorted square antiprism. In the crystals of those complexes, every four complex molecules form a block through strong intermolecular pi-pi stacking interactions between neutral ligands. The emission intensity of Eu(DBM)(3)pp is about twelve times of that of Eu(DBM)(3)qp, which results from the distinction of energy level between the second ligands.

关 键 词：铕配合物 晶体结构 荧光性质 二苯甲酰甲烷 喹喔啉并[2 3-i]-1 10-邻二氮杂菲 吡嗪并[2 3-i]-1 10-邻二氮杂菲 

分 类 号：O641.4[理学—物理化学]