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A rhodamine-based Hg2+-selective fluorescent probe in aqueous solution
Zhao, Minglei, Yang, Xiao-Feng, He, Shenfeng and Wang, Liping A rhodamine-based Hg2+-selective fluorescent probe in aqueous solution Chemical Papers, Vol.63, No. 3, 2009, 261-267
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Author(s) |
Zhao, Minglei
Yang, Xiao-Feng
He, Shenfeng
Wang, Liping
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| Title |
A rhodamine-based Hg2+-selective fluorescent probe in aqueous solution
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| Journal name |
Chemical Papers
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| Publication date |
2009
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| Year available |
2009
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| Volume number |
63
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| Issue number |
3
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| ISSN |
0366-6352
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| Start page |
261
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| End page |
267
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2009
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| Language |
english
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| Subject |
250000 Chemical Sciences
250400 Analytical Chemistry
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| Abstract/Summary |
A new rhodamine-based Hg2+-selective fluorescent probe (I) was designed and synthesized. Compound I displays excellent selective and sensitive response to Hg2+ over other transition metal ions in neutral aqueous solutions. I itself is a colorless, nonfluorescent compound. Upon addition of Hg2+ to its solution, the thiosemicarbazide moiety of I undergoes an irreversible desulfurization reaction to form the corresponding 1,3,4-oxadiazole (II), a colorful and fluorescent product, causing instantaneous development of visible color and strong fluorescence emission. Based on this mechanism, a fluorogenic probe for Hg2+ was developed. The fluorescence increases linearly with the Hg2+ concentration up to 0.8 μmol L−1 with the detection limit of 9.4 nmol L− (3σ).
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