Electrochemistry and Spectroelectrochemistry of Luminescent Europium Complexes
Electrochemistry and Spectroelectrochemistry of Luminescent Europium Complexes
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发光铕配合物的电化学和光谱电化学
DOI：
10.1002/elan.201600034
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发表时间：
2016
期刊：
影响因子：
3
通讯作者：
S. Bryan
中科院分区：
文献类型：
--
作者：
A. Lines;Zhemin Wang;S. Clark;S. Bryan
需要快速、经济有效且强大的检测和量化镧系元素的方法来支持核、医学和工业领域内更有效的跟踪。此外，还需要将镧系元素信号与光谱干扰物分离的方法。将光谱电化学应用于这些物种的检测可以满足这些需求。然而，该技术的应用受到镧系元素的低摩尔吸收率和量子产率的限制。这些限制可以通过将镧系元素与增强荧光的敏化配体络合来规避，从而降低检测极限。络合也会引起镧系元素电化学行为的变化。为了证明这一概念，使用铕作为模型镧系元素与四种不同敏化配体（包括 2,2'-联吡啶和相关衍生物）的配合物完成了研究。结果表明，所有四种研究的配合物均表现出准可逆氧化还原对，并且检测限有所改善，其中电化学和光谱特性显示出对所连接配体的一定依赖性。研究的所有四种配合物均显示出光谱电化学分析所需的特征，该分析已成功且可重复地应用于所有 Eu 配合物。
Fast, cost effective, and robust means of detecting and quantifying lanthanides are needed to support more efficient tracking within the nuclear, medicinal, and industrial fields. Furthermore, methods for isolating lanthanide signal from spectroscopic interferents are also needed. Applying spectroelectrochemistry to the detection of these species can meet those needs. However, application of this technique is limited by the low molar absorptivities and quantum yields of the lanthanides. These limitations can be circumvented by complexing the lanthanides with sensitizing ligands that enhance fluorescence, thereby dropping the limits of detection. Complexation will also cause changes in the electrochemical behavior of the lanthanides. To demonstrate this concept, studies were completed using europium as a model lanthanide in complexes with four different sensitizing ligands, which included 2,2′-bipyridine and related derivatives. Results indicate that all four studied complexes demonstrate quasi-reversible redox couples and improvements in limits of detection where electrochemical and spectroscopic characteristics showed some dependence on attached ligand. All four complexes studied display the necessary characteristics for spectroelectrochemical analysis, which was successfully and reproducibly applied to all Eu complexes.
影响因子：
2.3
作者：
Garcia, Joel;Kuda-Wedagedara, Akhila N. W.;Allen, Matthew J.
通讯作者：
Allen, Matthew J.
影响因子：
2.3
作者：
Garcia, Joel;Allen, Matthew J.
通讯作者：
Allen, Matthew J.