Facile fabrication and application of an innovative self-enhanced luminophore with outstanding electrochemiluminescence properties
Facile fabrication and application of an innovative self-enhanced luminophore with outstanding electrochemiluminescence properties
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具有出色电化学发光特性的创新自增强发光体的轻松制造和应用
DOI：
10.1016/j.sna.2020.112167
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发表时间：
2020-09
影响因子：
4.6
通讯作者：
You Tianyan
中科院分区：
文献类型：
--
作者：
Luo Lijun;Liu Xiaohong;Bi Xiaoya;Li Libo;You Tianyan
自增强电化学发光（ECL）技术由于其测量准确，其分析性能受到人们的特别关注。在这项研究中，一个创新的自增强发光体的合成利用氮掺杂的石墨烯量子点（NGQDs）作为共反应物的Ru（bpy）32+掺杂的二氧化硅纳米粒子（RuDS NPs）。由于RuDS NPs和NGQD都具有负电荷，因此首先用氨基修饰RuDS NPs以产生带正电荷的NH 2-RuDS NPs，其可以通过静电相互作用进一步成功地与带负电荷的NGQD结合。与NH 2-RuDS NPs和NGQDs的混合物相比，NH 2-RuDS@NGQDs发光体由于其短的电子转移距离和低的能量损失而表现出上级的ECL性能。基于NH 2-RuDS@NGQDs发光体的激发态与西维因氧化态之间的猝灭效应，成功构建了西维因电化学发光传感器。该传感器具有较宽的线性范围（1.0 × 10 - 13 ~ 1.0 × 10-4g mL-1）和较低的检测限（2.2 × 10- 15 g mL-1）。因此，具有优异性能的新型自增强型NH 2-RuDS@NGQDs发光体在生物分析中具有巨大的应用潜力。
Self-enhanced electrochemiluminescence (ECL) technology has raised special concern on analytical performance owing to its accurate measurement. In this study, an innovative self-enhanced luminophore was synthesized utilizing nitrogen doped graphene quantum dots (NGQDs) as co-reactant of Ru(bpy)32+-doped silica nanoparticles (RuDS NPs). Because both RuDS NPs and NGQDs exhibited negative charge, the RuDS NPs were firstly modified with amino groups to produce positively charged NH2-RuDS NPs, which can be further successfully combined with negatively charged NGQDs via electrostatic interaction. Compared with the mixture of NH2-RuDS NPs and NGQDs, the NH2-RuDS@NGQDs luminophore expressed superior ECL performance due to its short electron transfer distance and low energy loss. Based on the quenching effect between the excited state of NH2-RuDS@NGQDs luminophore and the oxidation form of carbaryl, a sensitive ECL sensor was successfully constructed for carbaryl quantification. The proposed self-enhanced ECL sensor exhibited a relatively wider linear range of 1.0 × 10−13- 1.0 × 10-4g mL-1and a lower detection limit of 2.2 × 10-15g mL-1in compassion with most reported methods. Therefore, the innovative self-enhanced NH2-RuDS@NGQDs luminophore with excellent performance may expand great potential in bioanalysis.
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