1. A Novel High Selectivity Fluorimetric and Colorimetric Probe Based on Rhodamine B Hydrazide Derivatives for Detecting [Hg.sup.2+] in Aqueous Media
- Author
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Gui, Kai, Yao, Ying, Liu, Hui-Xin, Fu, Xu-Mei, and Hu, Jing-Han
- Subjects
Fluorescence ,Ethylenediaminetetraacetic acid ,Chemistry ,Engineering and manufacturing industries ,Physics ,Science and technology - Abstract
A colorimetric and fluorescent dual-channel chemosensor (G1) with a simple structure was designed and synthesized to identify [Hg.sup.2+] in an aqueous solution with high selectivity and sensitivity. After adding [Hg.sup.2+], the color of G1 in the dimethyl sulfoxide (DMSO)/[H.sub.2]O (2:8, v/v) solution changed from colorless to a distinct rose red, whereas the fluorescence changed from colorless to bright orange under ultraviolet (UV) light. The detection limit on the fluorescence response of G1 to [Hg.sup.2+] was as low as 6.09 * [10.sup.-7] mol/L. The results of the Job's plot suggested that the combined stoichiometry between G1 and [Hg.sup.2+] was 1:1. By successively adding [Hg.sup.2+] and ethylenediaminetetraacetic acid (EDTA), the fluorescence process can be reversed and almost no fluorescence loss. In addition, G1-based test strips were produced and were able to qualitatively detect [Hg.sup.2+] in tap water., With the development of science and technology, mercury (Hg) is widely used in medical, military, and electrical applications (1-3). [Hg.sup.2+] is easily accumulated in the human body, and its great [...]
- Published
- 2022