Citation:
Yao Liu, Er-Bing Yang, Rui Han, Di Zhang, Yong Ye, Yu-Fen Zhao. A new rhodamine-based fl uorescent chemosensor for mercury in aqueous media[J]. Chinese Chemical Letters,
;2014, 25(7): 1065-1068.
doi:
10.1016/j.cclet.2014.04.033
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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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