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Updated: May 11, 2026

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
Published on: December 17, 2018
Two highly sensitive and selective colorimetric "off-on" rhodamine-based fluorescent chemosensor for Hg(II) in
Di Zhang1, Min Wang, Cuicui Wang
1Department of Chemistry, Phosphorus Chemical Engineering Research Center of Henan Province, Zhengzhou University, Zhengzhou, China.
Abstract:
Two novel rhodamine derivatives were designed and synthesized. They were successfully characterized by HR-MS, (1)H NMR and (13)C NMR. They were found to exhibit a reversible colorimetric response and exhibit high selectivity and sensitivity for Hg(II) ion over other commonly coexistent metal ions. Their selectivity is excellent, and the detection of Hg(II) at ppb level is possible. The colorimetric and fluorescent response to Hg(II) can be conveniently detected even by the naked eye, which provides a facile method for visual detection of Hg(II).
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