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Issue 62, 2019
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Electrostatic attraction-induced aggregation of polymer dots for the facile detection of melamine migration

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Abstract

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.

Graphical abstract: Electrostatic attraction-induced aggregation of polymer dots for the facile detection of melamine migration

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Supplementary files

Article information


Submitted
02 Sep 2019
Accepted
21 Oct 2019
First published
07 Nov 2019

This article is Open Access

RSC Adv., 2019,9, 36266-36270
Article type
Paper

Electrostatic attraction-induced aggregation of polymer dots for the facile detection of melamine migration

G. Zhang, Y. Chen, J. Xie, C. Lin and W. Yang, RSC Adv., 2019, 9, 36266
DOI: 10.1039/C9RA07005B

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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    [Original citation] - Published by The Royal Society of Chemistry.

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