Synthesis, characterization and fluorescence studies of a novel europium complex based sensor

Synthesis, characterization and fluorescence studies of a novel europium complex based sensor
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新型铕配合物传感器的合成、表征和荧光研究

DOI:
10.1016/j.jlumin.2010.08.004
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发表时间:
2010-12
影响因子:
3.6
通讯作者:
Li, Yang
Li, Yang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Li, Bin;Chen, Qiu-Yun;Wang, Ya-Chen;Huang, Jing;Li, Yang

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以TTA(α-噻吩甲酰三氟丙酮)为第一配体,H2 bpdc(2,2 ′-联吡啶-3,3 ′-二羧酸酯)为第二配体,合成了一种新型铕配合物。对配合物进行了元素分析、热分析、红外光谱、紫外-可见光谱和荧光光谱分析。在乙醇-水(1:1)溶液中观察到特征的Eu 3+荧光发射,表明配合物在溶液中稳定,Eu(III)离子的发射不受水分子的影响。配合物的荧光发射被Co ~(2+)和Fe ~(3+)离子完全猝灭,但在甘氨酸存在下,猝灭后的荧光发射被恢复。此外,Eu ~(3+)的发光对pH非常敏感,因此该配合物可用作pH依赖型荧光探针或化学传感器。
A novel europium(III) complex was synthesized using TTA (α-thenoyltrifluoroacetone) as the first ligand and H2bpdc (2,2′-bipyridine-3,3′-dicarboxylate) as the second ligand. Elemental analysis, thermal analysis, IR and UV–vis spectrum and fluorescence spectrum of the europium(III) complex were carried out. A characteristic Eu3+fluorescence emission was observed in ethanol–water (1:1) solution, indicating that the complex is stable in solution and the emission of Eu(III) ions was not influenced by the water molecules. The fluorescence emission of the complex was quenched completely by the Co2+and Fe3+ions, but the quenched emission was recovered in the presence of glycine. Moreover, the Eu3+emission was very sensitive to pH, so the complex can be used as pH-dependent fluorescence probe or chemosensors.
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