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Issue 43, 2016
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Semiconducting-polymer-dot based fluorescent probe for turn-on sensing of phytic acid

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Abstract

In this work, the synthesis of carboxyl functionalized semiconducting polymer dots (PFBT-COOH Pdots) is achieved by a co-precipitation method. The PFBT-COOH Pdots show extraordinary fluorescence brightness and excellent photostability, and the fluorescence of PFBT-COOH Pdots is selectively quenched by ferric ions. Upon addition of phytic acid (PA) to the Pdots/Fe(III) system, PA is able to selectively and preferentially bind with the ferric ions, thus leading to fluorescence recovery of the PFBT-COOH Pdots. Therefore, a simple, selective and sensitive fluorescence probe for PA detection is designed based on the fluorescence quenching-recover process. This probe exhibits a good linear relationship (R = 0.9988) with a linear range from 2.5 μmol L−1 to 450 μmol L−1 and a limit of detection of 0.63 μmol L−1. The probe also shows good selectivity for PA and a good recovery ratio, and it is applied to the determination of PA in a corn grains sample with satisfactory results.

Graphical abstract: Semiconducting-polymer-dot based fluorescent probe for turn-on sensing of phytic acid

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Publication details

The article was received on 22 Jul 2016, accepted on 07 Oct 2016 and first published on 07 Oct 2016


Article type: Paper
DOI: 10.1039/C6AY02082H
Citation: Anal. Methods, 2016,8, 7755-7761
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    Semiconducting-polymer-dot based fluorescent probe for turn-on sensing of phytic acid

    C. Wang, J. Sun, H. Mei and F. Gao, Anal. Methods, 2016, 8, 7755
    DOI: 10.1039/C6AY02082H

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