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Issue 17, 2014
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An Ru(II)–Fe(III) bimetallic complex as a multifunctional device for detecting, signal amplifying, and degrading oxalate

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Abstract

A tetranuclear bimetallic complex, [RuII(tBubpy)(CN)4]2–[FeIII(H2O)3Cl]2·8H2O (1) has been synthesized and characterized. It was found to be a multifunctional device that can detect, signal amplify, and degrade an organic pollutant, oxalate. Results of the chemosensing studies of 1 toward common anions show that only oxalate selectively induces naked-eye colorimetric and luminometric responses with method detection limits down to 78.7 and 5.5 ppm, respectively from 1. Meanwhile, results of the photo-degradation studies of 1 toward oxalate show that the dissolved organic carbon content of oxalate decreased and reached complete mineralization into CO2 within 6 hours. Complex 1 was also found as the catalyst that amplified the detection signal toward oxalate. Through the photoassisted Fenton reaction by 1, methyl orange, an additional coloring agent, could be degraded so that the visual detection limit of 1 toward oxalate was magnified 50 times from 100 to 2 ppm. The detection, degradation, mineralization and signal amplification were found applicable in real water bodies such as river, pond and underground water with excellent recoveries and relative standard deviation.

Graphical abstract: An Ru(ii)–Fe(iii) bimetallic complex as a multifunctional device for detecting, signal amplifying, and degrading oxalate

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Publication details

The article was received on 19 Feb 2014, accepted on 06 Jun 2014 and first published on 03 Jul 2014


Article type: Paper
DOI: 10.1039/C4AN00350K
Author version available: Download Author version (PDF)
Citation: Analyst, 2014,139, 4256-4263
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    An Ru(II)–Fe(III) bimetallic complex as a multifunctional device for detecting, signal amplifying, and degrading oxalate

    C. Chow, P. Ho and C. Gong, Analyst, 2014, 139, 4256
    DOI: 10.1039/C4AN00350K

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