A new rhodamine-based fluorescent chemosensor for mercury in aqueous media |
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| Authors: | Yao Liu, Er-Bing Yang, Rui Han, Di Zhang, Yong Ye, Yu-Fen Zhao |
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| Affiliation: | a Phosphorus Chemical Engineering Research Center of Henan Province, the College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China;b Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100086, China;c Key Lab Chem Biol, Fujian Prov. Coll. Chem. & Chem. Engn., Xiamen University, Xiamen 361005, China |
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| Abstract: | A new fluorescent "on-off" chemosensor for Hg2+ initiated by a derivative of rhodamine B was designed and synthesized. Compound 1 exhibited high sensitivity and selectivity for Hg2+ over other commonly coexistent metal ions in aqueous media. Upon the addition of Hg2+, the spirocyclic ring of probe is opened and a significant enhancement of visible color and fluorescence in the range of 500-600 nm is observed. The colorimetric and fluorescent response to Hg2+ can be conveniently detected by the naked eye, which provides a facile method for visual detection of Hg2+. From the molecular structure and spectral results of 1, an irreversible, hydrolysis, desulfurization reaction mechanism is proposed. |
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| Keywords: | Fluorescent probe Rhodamine Mercury On-off Chemosensor |
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