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Issue 10, 2010
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Discovery of a highly selective turn-on fluorescent probe for Ag+

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Abstract

An ideal fluorescent probe should show the strongest affinity with the relevant target (binding-selectivity) by means of a selective fluorescence change (signal-selectivity). [15]aneNO2S2 (1,4-dioxa-7,13-dithia-10-azacyclopentadecane) based probes usually show high binding selectivity for Ag+ but signal selectivity for Hg2+, because Ag+ can quench or silence the fluorescence. To amplify the Ag+ binding to the greatest extent, a carbonyl group was positioned between 1,8-naphthalimide and [15]aneNO2S2 which played a key role of displaying selective fluorescence enhancements with Ag+ through increasing the oxidation potential of the fluorophore, blocking Ag+ from sterically interacting with the naphthalimide fluorophore, and by acting as a sacrificial donor. Probe 2 can detect Ag+ with a selective fluorescence enhancement (∼14 fold) and high affinity (Ka = 1.64 × 105 M−1).

Graphical abstract: Discovery of a highly selective turn-on fluorescent probe for Ag+

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Supplementary files

Article information


Submitted
14 Jun 2010
Accepted
10 Aug 2010
First published
06 Sep 2010

Analyst, 2010,135, 2554-2559
Article type
Paper

Discovery of a highly selective turn-on fluorescent probe for Ag+

Z. Xu, S. Zheng, J. Yoon and D. R. Spring, Analyst, 2010, 135, 2554
DOI: 10.1039/C0AN00405G

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