A highly efficient and selective turn‐on fluorescent sensor for Hg2+, Ag+ and Ag nanoparticles based on a coumarin dithioate derivative |
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| Authors: | Heba A El‐Shekheby Ahmed H Mangood Salem M Hamza Ahmed S Al‐Kady El‐Zeiny M Ebeid |
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| Institution: | 1. Chemistry Department, Faculty of Science, El Menoufia University, Sheben ElKoom, Egypt;2. Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt;3. Forensic Medicine Authority, Ministry of Justice, Tanta, Egypt;4. Misr University for Science and Technology (MUST), 6th October City, Egypt |
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| Abstract: | Based on chelation‐enhanced fluorescence, a new fluorescent coumarin derivative probe 3(1‐(7‐hydroxy‐4‐methylcoumarin)ethylidene)hydrazinecarbodithioate for Hg2+, Ag+ and Ag nanoparticles is reported. Fluorescent probe acts as a rapid and highly selective “off–on” fluorescent probe and fluorescence enhancement by factors 5 to12 times was observed upon selective complexation with Hg2+, Ag+ and Ag nanoparticles. The molar ratio plots indicated the formation of 1:1 complexes between Hg2+ and Ag+ with the probe. The linear response range covers a concentration range 0.1 × 10–5–1.9 × 10–5 mol/L, 0.1 × 10–5–2.3 × 10–5 mol/L and 0.146 × 10–12–2.63 × 10–12 mol/L for Hg2+, Ag+ and Ag nanoparticles, respectively. The interference effect of some anions and cations was also tested. Copyright © 2013 John Wiley & Sons, Ltd. |
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| Keywords: | Chemosensor Coumarin derivative Fluorescence enhancement Mercury (II) ion sensor Silver (I) ion sensor Silver nanoparticle |
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