光谱学与光谱分析, 2011, 31 (9): 2346, 网络出版: 2011-11-09   

新型β-二酮配体及其Eu(Ⅲ)三元配合物的合成、表征及发光性能的研究

Synthesis, Characterization and Luminescence Properties of Novel β-Diketone and Eu(Ⅲ) Ternary Complex
作者单位
长春理工大学化学与环境工程学院, 吉林 长春130022
摘要
采用Claisen缩合反应合成了一种新型的β-二酮化合物1-(4-溴苯)-3-苯基丙烷-1,3-二酮(L), 并以其为第一配体, 邻菲罗啉(Phen)为第二配体, 合成出新型稀土Eu(Ⅲ)三元配合物。 通过元素分析、 红外光谱、 紫外光谱、 荧光光谱对合成的配体及三元配合物进行了表征。 红外光谱的分析表明: 配体L含有β-二酮结构, 且烯醇式含量高; 配合物中L的氧原子以及Phen中的氮原子与稀土离子进行了配位。 紫外光谱的分析表明配合物中的能量传递主要来自第一配体。 通过荧光光谱研究了配合物的发光性质, 结果显示配合物表现出Eu3+的特征发射, 主发射峰为Eu3+的5D0 →7F2发射, 属于窄带发射, 单色性较好, 是具有潜在应用价值的红色发光材料。
Abstract
The novel β-diketone 1-(4-bromophenyl)-3-phenylpropane-1,3-dione (L) was synthesized at room temperature by classical Claisen condensation reaction. With the β-diketone L as the first ligand and phen as the secondary ligand, and a new rare-earth Eu (Ⅲ) ternary complex was prepared. The ligand L and ternary complex were characterized by elemental analysis, IR spectra, UV spectra and fluorescence spectra. IR spectra indicated that: the novel ligand L contained the structure of β-diketone, where the content of enol was high; the Eu3+ ion in the ternary complex was coordinated with six oxygen atoms of three L ligands and two nitrogen atoms of the second ligand phen. UV spectra showed that the main absorption was from the first ligand L in the Eu (Ⅲ) ternary complex. The excitation and emission spectra of the ternary complex were measured and investigated. Fluorescence spectra demonstrated that the ternary complex could emit characteristic fluorescence of rare earth Eu3+ ion and the strongest emission band was narrow which was attributed to the 5D0 →7F2 transitions of the 4f electrons of the central Eu3+ ions. So, the new Eu(Ⅲ) ternary complex is an excellent red-emitter which would be regarded as a valuable material with bright red fluorescence because it presents good monochromaticity.

程果, 魏长平, 任晓明, 王贺, 魏文涛. 新型β-二酮配体及其Eu(Ⅲ)三元配合物的合成、表征及发光性能的研究[J]. 光谱学与光谱分析, 2011, 31(9): 2346. CHENG Guo, WEI Chang-ping, REN Xiao-ming, WANG He, WEI Wen-tao. Synthesis, Characterization and Luminescence Properties of Novel β-Diketone and Eu(Ⅲ) Ternary Complex[J]. Spectroscopy and Spectral Analysis, 2011, 31(9): 2346.

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