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首页> 外文期刊>Synthetic Metals >Functionalized magnetic nanoparticle with poly(3-thiopheneacetic acid) and its application for electrogenerated chemiluminescence sensor
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Functionalized magnetic nanoparticle with poly(3-thiopheneacetic acid) and its application for electrogenerated chemiluminescence sensor

机译：含3-硫代苯乙酸的功能化磁性纳米粒子及其在电致化学发光传感器中的应用

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摘要

Polymer-coated magnetic nanoparticles (MNPs) have been prepared and used as an immobilization matrix for the fabrication of solid-state tris(2,2'-bipyridyl)ruthenium(II) (Ru(bpy)~(2+)_3) electrogenerated chemiluminescence (ECL) sensor. The pre-synthesized maghemite (gamma-Fe_2O_3) MNPs were coated with poly(3-thiopheneacetic acid) based on an oxidative polymerization method using KMnO_4. The poly(3-thiopheneacetic acid)-coated MNPs have formed the clusters with average diameter of 200-500 nm. The multilayer films of poly(3-thiopheneacetic acid)-coated MNPs were uniformly formed on the surface of a Pt electrode by an external magnet. The Ru(bpy)~(2+)_3 was rapidly incorporated into the multilayer films within 5 min through the electrostatic interaction between the Ru(bpy)~(2+)_3 and the negatively charged carboxylates of 3-thiopheneacetic acid at pH 7.0. Due to the fast mass transport in the multilayer films of the functionalized MNPs, the present Ru(bpy)~(2+)_3 ECL sensor based on the functionalized MNPs showed improved ECL sensitivity for tripropylamine (TPA) compared to the Nafion-based ECL sensor. The present ECL sensor exhibited a quite low limit of detection for TPA (49 nM). The sensor-to-sensor reproducibility was very good (R.S.D. = 5 percent).
机译：制备了聚合物包覆的磁性纳米颗粒（MNP），并将其用作固定基质，用于制造电生成的固态三（2,2'-联吡啶基）钌（II）（Ru（bpy）〜（2 +）_ 3）化学发光（ECL）传感器。基于使用KMnO_4的氧化聚合方法，将聚（3-噻吩乙酸）涂覆到预先合成的磁赤铁矿（γ-Fe_2O_3）MNP上。涂覆有聚（3-噻吩乙酸）的MNP形成了平均直径为200-500 nm的簇。聚（3-噻吩乙酸）包覆的MNP的多层膜通过外部磁体均匀地形成在Pt电极的表面上。通过Ru（bpy）〜（2 +）_ 3与pH 7.0的3-噻吩乙酸带负电荷的羧酸盐之间的静电相互作用，将Ru（bpy）〜（2 +）_ 3快速掺入多层膜中。由于官能化的MNP多层膜中的快速质量传输，与基于Nafion的ECL相比，目前基于官能化MNP的Ru（bpy）〜（2 +）_ 3 ECL传感器对三丙胺（TPA）的ECL敏感性有所提高。传感器。当前的ECL传感器对TPA的检测限很低（49 nM）。传感器之间的可重复性非常好（R.S.D. = 5％）。

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