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

Abstract

A multimode ratiometric Hg²⁺ selective chemosensor based on a carbazole–thiobarbituric acid conjugate was developed. It responds to the presence of Hg²⁺ by colorimetry and by fluorescence. The sensor action is demonstrated in both aqueous homogeneous or microheterogeneous media.