Issue 12, 2017

A simple cost effective carbazole–thiobarbituric acid conjugate as a ratiometric fluorescent probe for detection of mercury(ii) ions in aqueous medium

Abstract

A multimode ratiometric Hg2+ selective chemosensor system based on a carbazole–thiobarbituric acid conjugate (CTBA) was developed. Its colorimetric and fluorescence behavior towards Hg2+ ions in both homogeneous and microheterogeneous media were investigated. A ratiometric mode of response of absorption as well as fluorescence in acetonitrile and 9 : 1 THF/H2O medium was observed in the presence of Hg2+ ions. The sensing mechanism involves formation of a 1 : 2 CTBA : Hg2+ complex by deprotonation of imide protons of the thiobarbituric acid unit. The complex formation can be reversed by using competing ligands such as cysteamine hydrochloride.

Graphical abstract: A simple cost effective carbazole–thiobarbituric acid conjugate as a ratiometric fluorescent probe for detection of mercury(ii) ions in aqueous medium

Supplementary files

Article information

Article type
Paper
Submitted
10 Mar 2017
Accepted
15 May 2017
First published
30 May 2017

New J. Chem., 2017,41, 5176-5181

A simple cost effective carbazole–thiobarbituric acid conjugate as a ratiometric fluorescent probe for detection of mercury(II) ions in aqueous medium

K. Kala, P. K. Vineetha and N. Manoj, New J. Chem., 2017, 41, 5176 DOI: 10.1039/C7NJ00805H

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