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Cited by 167

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Selective Hg(II) Detection in Aqueous Solution with Thiol Derivatized Fluoresceins

Open access
Nolan, Elizabeth M., Racine, Maryann E., Lippard, Stephen J.·2006·Inorganic Chemistry

Abstract

The syntheses and photophysical properties of mercury sensors 2 and 3 (MS2 and MS3), two asymmetrically derivatized fluorescein-based dyes designed for Hg(II) detection, are described. These sensors each contain a single pyridyl-amine-thiol metal-binding moiety, form 1:1 complexes with Hg(II), and exhibit selectivity for Hg(II) over other Group 12 metals, alkali and alkaline earth metals, and most divalent first-row transition metals. Both dyes display superior brightness (Phi x epsilon) and fluorescence enhancement following Hg(II) coordination in aqueous solution. At neutral pH, the fluorescence turn-on derives from greater brightness due to increased molar absorptivity. At higher pH, photoinduced electron transfer quenching of the free dye is enhanced, and the Hg(II)-induced turn-on also benefits from alleviation of this pathway. MS2 can detect ppb levels of Hg(II) in aqueous solution, demonstrating its ability to identify environmentally relevant concentrations of Hg(II).

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Metadata

Authors
Nolan, E. M., Racine, M. E., & Lippard, S. J.
Venue
Inorganic Chemistry
Published
2006-02-11
Volume
45
Issue
6
Pages
2742-2749
ISSN
  • 0020-1669 (ISSN-L)
  • 1520-510X
OpenAlex
W2074980561
Cited by
167
References
1
FWCI
9.62
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Selective Hg(II) Detection in Aqueous Solution with Thiol Derivatized Fluoresceins. https://app.cochat.ai/papers/10.1021/ic052083w
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Nolan, E. M., Racine, M. E., & Lippard, S. J. (2006). Selective Hg(II) Detection in Aqueous Solution with Thiol Derivatized Fluoresceins. Inorganic Chemistry. https://doi.org/10.1021/ic052083w

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