[铕（III）-糠酸配合物的光谱]

[Spectra of complexes Eu(III)-furoic acid].

作者信息

Li Xia

机构信息

Department of Chemistry, Capital Normal University, Beijing 100037, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2004 Jan;24(1):92-4.

PMID:15768986

Abstract

Three europium complexes [Eu(FA)3 x 2H2O] x NO3 (4,4'-Hbpy), [Eu(FA)3 x phen]H2O and Eu(FA)2 x NO3 x phen have been synthesized (FA = alpha-furoate, phen = 1,10-phenanthroline, 4,4'-Hbpy = 4,4'-bipyridine). The compositions and structures of these complexes were determined with elemental analysis, IR, UV and luminescence spectra. The luminescence spectra of the Eu complexes in solution show that the intensity of the ternary complex [Eu(FA)3 x phen]H2O is higher than that of the quaternary complex Eu(FA)2 x NO3 x phen, and much higher than that of [Eu(FA)3 x 2H2O] x NO3 (4,4'-Hbpy). The measured lifetime is 0.46 ms for complex [Eu(FA)3 x 2H2O] x NO3 (4,4'-Hbpy). These measured lifetimes are 1.13 and 1.20 ms for complexes [Eu(FA)3 x phen]H2O and Eu(FA)2 x NO3 x phen, respectively. This phenomenon correlates with antenna effect of phen and luminescence quenching of coordinated water.

摘要

合成了三种铕配合物[Eu(FA)₃·2H₂O]·NO₃(4,4'-Hbpy)、[Eu(FA)₃·phen]H₂O和Eu(FA)₂·NO₃·phen（FA = α-糠酸根，phen = 1,10-菲咯啉，4,4'-Hbpy = 4,4'-联吡啶）。通过元素分析、红外光谱、紫外光谱和发光光谱确定了这些配合物的组成和结构。铕配合物在溶液中的发光光谱表明，三元配合物[Eu(FA)₃·phen]H₂O的强度高于四元配合物Eu(FA)₂·NO₃·phen，且远高于[Eu(FA)₃·2H₂O]·NO₃(4,4'-Hbpy)。配合物[Eu(FA)₃·2H₂O]·NO₃(4,4'-Hbpy)的测量寿命为0.46 ms。配合物[Eu(FA)₃·phen]H₂O和Eu(FA)₂·NO₃·phen的这些测量寿命分别为1.13 ms和1.20 ms。这种现象与phen的天线效应和配位水的发光猝灭有关。