一种新型Eu^(3+)和Zn^(2+)双金属杂核配合物的结构与发光性质  

Structure and Photoluminescent Properties of a Novel Eu^(3+)-Zn^(2+) Heteronuclear Complex

作　　者：张可青[1] 杜晨霞[1] 侯彦辉[1] 吴养洁[1] 

机构地区：[1]郑州大学化学系,河南郑州450052

出　　处：《化学研究》2006年第3期1-4,9,共5页Chemical Research

基　　金：河南省自然科学基金(0312000700);国家自然科学基金(20471054)资助项目

摘　　要：合成了一种新型双金属杂核配合物Eu(TTA)3Zn(Salen).H2O(Salen=双水杨醛缩乙二胺,TTA=2-噻吩甲酰三氟丙酮),并对其进行了结构和荧光性能表征.配合物的晶体属于三斜晶系,Pī空间群.中心Eu(Ⅲ)离子与六个TTA分子的氧原子和Salen分子的两个酚氧原子配位,形成8配位的扭曲四方反棱柱构型.Zn(Ⅱ)离子与Salen分子中的两个酚氧原子和两个氮原子以及一个水分子配位,形成五配位的扭曲的四方锥构型.配合物Eu(TTA)3Zn(Salen).H2O的发光量子效率(18.0%)较配合物Eu(TTA)3.2H2O(12.5%)发光量子效率有明显提高,说明第二配体Zn(Salen).H2O对中心离子有较强的敏化发光作用.A new heteronuclear complex Eu（TFA）3 Zn（Salen） · H2O （ where TFA is 2 -thenoyltrifluoro acetone, Salen is N, N-disalicylidene ethylenediamine ） was synthesized and characterized by X-ray diffraction. This complex crystallized in monoclinic with space group of Pi. Each Eu^3＋ ion is eight coordinated with six oxygen atoms from three TFA ligands and two phenolic oxygen atoms from the second ligand Salen, forming a distorted square antiprism. The Zn^2＋ ion is five coordinated with two nitrogen atoms and two phenolic oxygen atoms of Salen ligand and one water molecule, the coordination geometry of Zn^2＋ is a distored square pyramid. The complex Eu（TFA）3Zn（Salen）. H2O shows enhanced emission quantum yield（ 18.0 %） compared with Eu（TFA）3.2H2O（ 12.5 %）, which indicates that the second ligand Zn（Salen）. H2O has strong antenna effect to the intense red emission of Eu^3＋ ion.

关 键 词：铕配合物 SCHIFF碱 光致发光 晶体结构 

分 类 号：O641.4[理学—物理化学]