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首页> 外文期刊>RSC Advances >Electrostatic attraction-induced aggregation of polymer dots for the facile detection of melamine migration
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Electrostatic attraction-induced aggregation of polymer dots for the facile detection of melamine migration

机译：静电吸引诱导的聚合物点聚集，可轻松检测三聚氰胺迁移

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Many polymer dot (Pdot)-based assays involve complicated modifications for target recognition and detection. In this work, the fluorescence quenching of Pdots based on electrostatic attraction-induced aggregation was proposed for the first time. It was demonstrated that the prepared Pdots were negatively charged and electron-rich (e-Pdots), while protonated melamine was positively charged and electron-withdrawing. Therefore, the melamine was likely to electrostatically attract the e-Pdots, resulting in the aggregation of a melamine–e-Pdot complex. Meanwhile, the electron-transfer from the e-Pdots to the protonated melamine resulted in a remarkable fluorescence quenching. Accordingly, an e-Pdot-based assay was developed for the facile detection of melamine in the range of 0.1–100 nM and the limit of detection was as low as 0.03 nM. Furthermore, this method was applied for monitoring the melamine migration from a resin bowl, and the satisfactory results prove the promising applications of these e-Pdots.
机译：许多基于聚合物点（Pdot）的测定法都涉及目标识别和检测的复杂修饰。在这项工作中，首次提出了基于静电吸引诱导的聚集的Pdots的荧光猝灭。已证明制备的Pdots带负电且富含电子（e-Pdots），而质子化的三聚氰胺带正电且具有吸电子性。因此，三聚氰胺可能会静电吸引e-Pdot，从而导致三聚氰胺-e-Pdot复合物的聚集。同时，电子从e-P点转移到质子化三聚氰胺上导致显着的荧光猝灭。因此，开发了一种基于e-​​Pdot的测定方法，可轻松检测三聚氰胺，范围为0.1–100 nM，检出限低至0.03 nM。此外，该方法用于监测三聚氰胺从树脂碗中的迁移，令人满意的结果证明了这些e-Pdots的应用前景广阔。

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