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http://dx.doi.org/10.5012/bkcs.2008.29.3.571

Rhodamine B Hydrazide Revisited: Chemodosimetric Hg2+-selective Signaling Behavior in Aqueous Environments  

Kim, Kyoung-Nam (Department of Chemistry, Chung-Ang University)
Choi, Myung-Gil (Department of Chemistry, Chung-Ang University)
Noh, Jae-Hyun (Department of Chemistry, Chung-Ang University)
Ahn, Sang-Doo (Department of Chemistry, Chung-Ang University)
Chang, Suk-Kyu (Department of Chemistry, Chung-Ang University)
Publication Information
Bulletin of the Korean Chemical Society / v.29, no.3, 2008 , pp. 571-574 More about this Journal
Abstract
The well-known Cu2+-selective chemodosimetric behavior of rhodamine B hydrazide was successfully switched to selectivity for Hg2+. The fluorescence signaling is remarkably selective toward Hg2+ ions compared to other common biologically and environmentally important metal ions, including Cu2+ ions. The detection limit was 0.2 mM in an acetate-buffered aqueous 10% methanol solution at pH 5. The OFF-ON type of signaling is due to the selective Hg2+-induced hydrolysis of the lactam ring of the hydrazide as has been reported for the standard Cu2+-signaling process of the same compound. A simple change in medium resulted in clear switching of selective signaling from Cu2+ to Hg2+, which extends the applicability of the easily accessible hydrazide derivative.
Keywords
Chemodosimeter; Hg2+-selectivity; Rhodamine; Fluorescence
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Times Cited By Web Of Science : 9  (Related Records In Web of Science)
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