SIOC English
化学学报
高级检索

化学学报 ›› 1997, Vol. 55 ›› Issue (2): 153-159. 上一篇    下一篇

研究论文

新型铕(Ⅲ)、穴醚[2.2]与α-噻吩甲酰三氟丙酮三元荧光配合物的合成与表征

余江;许振华;徐光宪;韩梅   

  1. 中国科学院化工冶金研究所;中国科学院分离科学与工程青年实验室;北京大学化学与分子工程学院
  • 发布日期:1997-02-15

The synthesis and characterization of novel luminescent europium (Ⅲ) complexes with mixed ligand of HTTA and cryptand [2.2]

YU JIANG;XU ZHENHUA;XU GUANGXIAN;HAN MEI   

  • Published:1997-02-15

PDF

547

首次合成两种穴醚[2.2](C[2.2]), α-噻吩甲酰三氟丙酮(HTTA)和稀土铕(Ⅲ)的三元混配配合物: 2Eu(TTA)3.2HTTA.C[2.2](A)和2Eu(TTA)3.C[2.2](B)。与传统的强荧光配合物Eu.(TTA)3.2H2O(C)相比, 有以下的相对荧光强度比例关系: I(A):I(B):I(C)=13.3:3.7:1, 且混配配合物荧光单色性好。配合物的差热热重、红外光谱、Raman光谱和荧光光谱表明, 三元配合物分子中共轭效应增强, 分子内能量转移效率提高; 配合物晶体场对称性提高; 同时消除了水分子对荧光的猝灭作用, 增强了三元混配配合物的荧光强度。

关键词: 红外分光光度法, 三元络合物, 噻吩甲酰三氟丙酮, 热重量分析, 差热分析, 铕络合物, 荧光分光光度法, 穴醚, 结构表征

Two kinds of Eu (Ⅲ) complexes with mixed ligands of α-thenoyltrifluoroacetone (HTTA) and cryptand [2.2] (C[2.2]) were prepared: 2Eu(TTA)3.2HTTA.C[2.2](A) and 2Eu.(TTA)3.C[2.2](B). The observed intensity of luminescence of the complexes A and B is 13.3 and 3.7 times respectively greater than that of the complex Eu(TTA)3.2H2O(C) under the same experimental conditions. The enhancement of luminescence intensity is the results of increasing the efficiency of the intermolecular energy transfer and preventing coordinational H2O from quenching luminescence of the rare earth ions by adding of cryptand [2.2]. The thermal properties and their structural characters of these complexes are also described basing on the results of TG and DTA, as well as the results of FT-IR and FT-Raman spectra.

Key words: INFRARED SPECTROPHOTOMETRY, TERNARY COMPLEX, 2-THENOYL-TRIFLUORO-ACETONE, THERMOGRAVIMETRY, DIFFERENTIAL THERMAL ANALYSIS, EUROPIUM COMPLEX, FLUOROSPECTROPHOTOMETRY, CRYPTAND, STRUCTURE CHARACTERISTICS

中图分类号: