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Fluorescent probe acts as a rapid and highly selective \u201coff\u2013on\u201d fluorescent probe and fluorescence enhancement by factors 5 to12 times was observed upon selective complexation with Hg<jats:sup>2+<\/jats:sup>, Ag<jats:sup>+<\/jats:sup> and Ag nanoparticles. The molar ratio plots indicated the formation of 1:1 complexes between Hg<jats:sup>2+<\/jats:sup> and Ag<jats:sup>+<\/jats:sup> with the probe. The linear response range covers a concentration range 0.1\u2009\u00d7\u200910<jats:sup>\u20135<\/jats:sup>\u20131.9\u2009\u00d7\u200910<jats:sup>\u20135<\/jats:sup>\u2009mol\/L, 0.1\u2009\u00d7\u200910<jats:sup>\u20135<\/jats:sup>\u20132.3\u2009\u00d7\u200910<jats:sup>\u20135<\/jats:sup>\u2009mol\/L and 0.146\u2009\u00d7\u200910<jats:sup>\u201312<\/jats:sup>\u20132.63\u2009\u00d7\u200910<jats:sup>\u201312<\/jats:sup>\u2009mol\/L for Hg<jats:sup>2+<\/jats:sup>, Ag<jats:sup>+<\/jats:sup> and Ag nanoparticles, respectively. The interference effect of some anions and cations was also tested. Copyright \u00a9 2013 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/bio.2521","type":"journal-article","created":{"date-parts":[[2013,5,23]],"date-time":"2013-05-23T00:02:59Z","timestamp":1369267379000},"page":"158-167","source":"Crossref","is-referenced-by-count":53,"title":["A highly efficient and selective turn\u2010on fluorescent sensor for Hg<sup>2+<\/sup>, Ag<sup>+<\/sup> and Ag nanoparticles based on a coumarin dithioate derivative"],"prefix":"10.1002","volume":"29","author":[{"given":"Heba A.","family":"El\u2010Shekheby","sequence":"first","affiliation":[{"name":"Chemistry Department, Faculty of Science El Menoufia University  Sheben ElKoom Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ahmed H.","family":"Mangood","sequence":"additional","affiliation":[{"name":"Chemistry Department, Faculty of Science El Menoufia University  Sheben ElKoom Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Salem 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