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Sequential detection of Fe3+/2+ and pyrophosphate by a colorimetric chemosensor in a near-perfect aqueous solution

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Abstract

A novel colorimetric chemosensor 1 was designed and synthesized for Fe3+/2+ and pyrophosphate. Sensor 1 showed a selective color change toward both Fe3+ and Fe2+ from yellow to brown in a near-perfect aqueous solution. The detection limits (0.36 μM and 0.37 μM) for Fe3+ and Fe2+ were much lower than the guideline (5.37 μM) set by the Environmental Protection Agency (EPA) for iron in drinking water. Sensor 1 could be used to quantify Fe3+ in real water samples. Moreover, the resulting Fe3+-2·1 complex can detect pyrophosphate selectively over various anions especially including phosphate-based anions through a metal-complex displacement method. Based on UV-vis titrations, Job plot and ESI-mass spectrometry analyses, the sensing mechanisms of Fe3+, Fe2+ and PPi were proposed.

Graphical abstract: Sequential detection of Fe3+/2+ and pyrophosphate by a colorimetric chemosensor in a near-perfect aqueous solution

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Publication details

The article was received on 22 Sep 2017, accepted on 04 Nov 2017 and first published on 09 Nov 2017


Article type: Paper
DOI: 10.1039/C7PP00354D
Citation: Photochem. Photobiol. Sci., 2017, Advance Article
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    Sequential detection of Fe3+/2+ and pyrophosphate by a colorimetric chemosensor in a near-perfect aqueous solution

    J. B. Chae, H. J. Jang and C. Kim, Photochem. Photobiol. Sci., 2017, Advance Article , DOI: 10.1039/C7PP00354D

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