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A highly efficient and selective turn‐on fluorescent sensor for Hg 2+ , Ag + and Ag nanoparticles based on a coumarin dithioate derivative
Author(s) -
ElShekheby Heba A.,
Mangood Ahmed H.,
Hamza Salem M.,
AlKady Ahmed S.,
Ebeid ElZeiny M.
Publication year - 2014
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2521
Subject(s) - fluorescence , coumarin , chemistry , nanoparticle , derivative (finance) , chelation , selectivity , nuclear chemistry , turn (biochemistry) , inorganic chemistry , nanotechnology , organic chemistry , materials science , catalysis , biochemistry , physics , quantum mechanics , financial economics , economics
Based on chelation‐enhanced fluorescence, a new fluorescent coumarin derivative probe 3(1‐(7‐hydroxy‐4‐methylcoumarin)ethylidene)hydrazinecarbodithioate for Hg 2+ , 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 Hg 2+ , Ag + and Ag nanoparticles. The molar ratio plots indicated the formation of 1:1 complexes between Hg 2+ 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 Hg 2+ , Ag + and Ag nanoparticles, respectively. The interference effect of some anions and cations was also tested. Copyright © 2013 John Wiley & Sons, Ltd.