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Issue 21, 2019
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A colorimetric probe for the real-time naked eye detection of cyanide and hydroxide ions in tap water: experimental and theoretical studies

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Abstract

Herein, a colorimetric sensor (L) based on a naphthyl derivative bearing hydrazone receptors was synthesized via a one-step reaction process, and its recognition properties towards biologically important anions in an acetonitrile–water mixture were investigated by naked-eye observation and UV-Vis and 1H NMR spectroscopy. The molar addition of anions, such as TBAF, TBAOH, TBACN and TBAAcO, induced a significant red shift in the charge transfer band (Δλ = 73 nm, from 337 nm to 410 nm), in agreement with visible “naked eye” detectable colorimetric activities; in addition, soaked-in-L paper strips were prepared, which could significantly discriminate cyanide (KCN) and hydroxide (NaOH) ions dissolved in tap water via the litmus test method. This study was complemented by density functional theory computations to gain more insight into the interaction between L and anions.

Graphical abstract: A colorimetric probe for the real-time naked eye detection of cyanide and hydroxide ions in tap water: experimental and theoretical studies

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Publication details

The article was received on 03 Aug 2019, accepted on 17 Sep 2019 and first published on 18 Sep 2019


Article type: Paper
DOI: 10.1039/C9AN01481K
Analyst, 2019,144, 6422-6431

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    A colorimetric probe for the real-time naked eye detection of cyanide and hydroxide ions in tap water: experimental and theoretical studies

    V. Uahengo, J. Naimhwaka, L. S. Daniel, A. Rahman, M. I. Elzagheid, L. Rhyman, P. Ramasami and P. Cai, Analyst, 2019, 144, 6422
    DOI: 10.1039/C9AN01481K

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