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Issue 20, 2017
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A reaction-based luminescent switch-on sensor for the detection of OH ions in simulated wastewater

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Abstract

A series of luminescent iridium(III) complexes were synthesized and evaluated for their ability to interact with hydroxide ions in semi-aqueous media at ambient temperature. Upon the addition of OH, a nucleophilic aromatic substitution reaction takes place at the bromine groups of the N^N ligand of complex 1, resulting in the generation of a yellow-green luminescence. Complex 1 showed a 35-fold enhanced emission at pH 14 when compared to neutral pH, and the detection limit for OH ions was 4.96 μM. Complex 1 exhibited high sensitivity and selectivity, long-lived luminescence and impressive stability. Additionally, we have demonstrated the practical application of complex 1 to detect OH ions in simulated wastewater.

Graphical abstract: A reaction-based luminescent switch-on sensor for the detection of OH− ions in simulated wastewater

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Publication details

The article was received on 20 Feb 2017, accepted on 25 Apr 2017 and first published on 26 Apr 2017


Article type: Paper
DOI: 10.1039/C7DT00633K
Citation: Dalton Trans., 2017,46, 6677-6682
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    A reaction-based luminescent switch-on sensor for the detection of OH ions in simulated wastewater

    C. Wu, K. Vellaisamy, G. Yang, Z. Dong, C. Leung, J. Liu and D. Ma, Dalton Trans., 2017, 46, 6677
    DOI: 10.1039/C7DT00633K

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