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An ultrasensitive electrochemiluminescence sensor based on luminol functionalized AuNPs@Fe-Co-Co nanocomposite as signal probe for glutathione determination
Journal of Electroanalytical Chemistry ( IF 4.1 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.jelechem.2020.114374
Yuxin Pu , Mao Zhou , Peijin Wang , Qian Wu , Tingting Liu , Mingxiao Zhang

Abstract In this work, the FeyCo3-y [Co (CN)6]2 Prussian blue analogues (Fe-Co-Co PBAs) was first used as the regenerable co-reaction accelerator in luminol-O2 system to accelerate the electrochemiluminescence (ECL) reaction rate of luminol and the co-reactant of O2 for signal amplification. Remarkably, the ECL intensity of luminol functionalized AuNPs@Fe-Co-Co (luminol-AuNPs@Fe-Co-Co) nanocomposite first synthesized as an ECL probe via a green and simple method exhibited ~41-fold enhancement compared with luminol-AuNPs. Because the Fe-Co-Co PBAs with excellent reversible redox property could accelerate the reduction of dissolved O2 to generate plenty of reactive oxygen species (ROSs) for promoting luminol to emit a strong ECL signal. In addition, Fe-Co-Co PBAs acted as a satisfying nanocarrier to immobilize more luminol-AuNPs. Owing to the strong quenching effect of glutathione (GSH) on the ECL emission of luminol, the constructed ECL sensor for the quantitative analysis of GSH performed an excellent linearity from 1.0 nM to 1.0 mM with a low detection limit of 0.11 nM. Simultaneously, the proposed sensor applied for GSH determination in human serum samples with desirable results. This work introduced a robust co-reaction accelerator into luminol-O2 system to enhance the ECL intensity, further widening the application of luminol-centric ECL sensor in the bioanalysis field.

中文翻译:

基于鲁米诺功能化AuNPs@Fe-Co-Co纳米复合材料的超灵敏电化学发光传感器作为谷胱甘肽测定的信号探针

摘要 在这项工作中,FeyCo3-y [Co (CN)6]2 普鲁士蓝类似物 (Fe-Co-Co PBAs) 首次被用作鲁米诺-O2 系统中的可再生共反应加速器以加速电化学发光 (ECL)鲁米诺与O2共反应物的反应速率,用于信号放大。值得注意的是,鲁米诺功能化的 AuNPs@Fe-Co-Co(鲁米诺-AuNPs@Fe-Co-Co)纳米复合材料的 ECL 强度首先通过绿色和简单的方法合成为 ECL 探针,与鲁米诺-AuNP 相比表现出约 41 倍的增强. 因为具有优异可逆氧化还原性能的 Fe-Co-Co PBAs 可以加速溶解氧的还原,产生大量的活性氧 (ROS),促进鲁米诺发出强烈的 ECL 信号。此外,Fe-Co-Co PBAs 作为一种令人满意的纳米载体来固定更多的鲁米诺-AuNPs。由于谷胱甘肽 (GSH) 对鲁米诺 ECL 发射的强烈猝灭作用,构建的用于 GSH 定量分析的 ECL 传感器在 1.0 nM 至 1.0 mM 范围内具有良好的线性,检测限低至 0.11 nM。同时,所提出的传感器适用于人血清样品中 GSH 的测定,结果令人满意。这项工作在鲁米诺-O2 系统中引入了一个强大的共反应加速器,以增强 ECL 强度,进一步拓宽了以鲁米诺为中心的 ECL 传感器在生物分析领域的应用。所提出的传感器应用于人血清样品中 GSH 的测定,结果令人满意。这项工作在鲁米诺-O2 系统中引入了一个强大的共反应加速器,以增强 ECL 强度,进一步拓宽了以鲁米诺为中心的 ECL 传感器在生物分析领域的应用。所提出的传感器应用于人血清样品中 GSH 的测定,结果令人满意。这项工作在鲁米诺-O2 系统中引入了一个强大的共反应加速器,以增强 ECL 强度,进一步拓宽了以鲁米诺为中心的 ECL 传感器在生物分析领域的应用。
更新日期:2020-09-01
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