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Rhodamine-Based Conjugate Polymer: Potentiometric, colorimetric and voltammetric sensing of mercury ion in aqueous medium

Abstract

Herein, we report the synthesis and characterization of a new rhodamine-based monomer (RD-CZ) and investigation of optical and electrochemical properties of its polymer (P(RD-CZ)) which electropolimerized on an ITO electrode. P(RD-CZ) polymer film used as a simple and novel multi-signal sensor platform which demonstrates ion selective property potentiometric, colorimetric and voltammetric responses in aqueous media for the first time. P(RD-CZ) exhibits excellent selectivity for Hg2+ ions compared with Cd2+, Cu2+ Zn2+, Fe3+ by potentiometric technique depend on increasing charge carrier transport through rhodamine-bound Hg2+ with 9.77x10-8M of limit of detection (LOD). P(RD-CZ) polymer film also exhibits distinct color change from orange to purple, detectable even by naked-eyes, in presence of Hg2+ ions. The LOD for Hg2+ ion obtained by colorimetric method is 3.16x10-8M. The same material has also been used for voltammetric sensing of Hg2+ in aqueous media with a detection limit of 1x10-7 M. In the frame of this study, conductive polymer-based sensor platform detecting mercury ions with three different methods was designed for the first time. By doing so, disposable planar paper-based ion-sensing platform which is suitable for low-cost point-of-care and in-field testing applications, could be fabricated with highly reproducible and linear responses towards different concentrations of analytes ions in aqueous and biological samples

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Supplementary files

Publication details

The article was received on 10 Apr 2017, accepted on 05 Aug 2017 and first published on 08 Aug 2017


Article type: Paper
DOI: 10.1039/C7AN00606C
Citation: Analyst, 2017, Accepted Manuscript
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    Rhodamine-Based Conjugate Polymer: Potentiometric, colorimetric and voltammetric sensing of mercury ion in aqueous medium

    R. Ayranci, D. Odaci Demirkol, S. Timur and M. Ak, Analyst, 2017, Accepted Manuscript , DOI: 10.1039/C7AN00606C

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