Ultrasensitive Electrochemiluminescence Aptamer Sensor Based on Ru@ZIF-Pd Cathode for Acetamiprid Detection.

IF 4.7 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2025-01-20 Epub Date: 2024-12-08 DOI:10.1021/acsabm.4c01487

Mingyue Shao, Cuili Kong, Yilin Long, Wenbin Jiang, Huan Wang, Xiang Ren, Jinxiu Zhao, Qin Wei

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Abstract

Ru(bpy)₃²⁺ is commonly used in electrochemiluminescence (ECL) as a conventional luminophore. However, Ru(bpy)₃²⁺ can leak off the electrode surface, resulting in a reduced ECL signal. In this work, a nanocube composite material Ru@ZIF was prepared by incorporating doping luminescent Ru(bpy)₃²⁺ into the skeleton of Zn(II) ions and 2-methylimidazole (2-MI), and the ECL probe Ru@ZIF-Pd was prepared by in situ growth of Pd nanoparticles (Pd NPs). Potassium persulfate (K₂S₂O₈) was used as a coreactant to investigate the cathodic ECL behavior. The ZnCoCH@MXene-Au (ZC@T-Au) was used as a coreactant accelerator to promote the production of SO₄^•-, which effectively amplified the ECL intensity of Ru@ZIF-Pd. Under optimal experimental conditions, we successfully constructed an aptamer ECL sensor, which achieves an accurate detection of acetamiprid from 0.1 fM to 10 μM with a detection limit of 0.029 fM. It provides a potential idea for the detection of pesticide residues in food.

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基于Ru@ZIF-Pd阴极的超灵敏电化学发光适体传感器检测啶虫脒。

Ru(bpy)32+是电化学发光（ECL）中常用的发光材料。然而，Ru(bpy)32+会从电极表面泄漏，导致ECL信号降低。本文通过在Zn（II）离子和2-甲基咪唑（2-MI）骨架中掺杂发光Ru(bpy)32+制备了纳米立方体复合材料Ru@ZIF，并通过原位生长Pd纳米颗粒（Pd NPs）制备了ECL探针Ru@ZIF-Pd。以过硫酸钾（K2S2O8）为反应物，研究了阴极ECL行为。利用ZnCoCH@MXene-Au （ZC@T-Au）作为助催化剂促进SO4•-的生成，有效地放大了Ru@ZIF-Pd的ECL强度。在最佳实验条件下，我们成功构建了适体ECL传感器，该传感器在0.1 ~ 10 μM范围内实现了对啶虫脒的精确检测，检测限为0.029 fM。为食品中农药残留的检测提供了一种新的思路。

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来源期刊

ACS Applied Bio Materials Chemistry-Chemistry (all)

CiteScore

9.40

自引率

2.10%

发文量

464

期刊介绍： ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.