title: A highly efficient and selective turn-on fluorescent sensor for Hg2+, Ag+ and Ag nanoparticles based on a coumarin dithioate derivative.
abstract: 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 to 12 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.
authors.affiliation: Chemistry Department, Faculty of Science, El Menoufia University, Sheben ElKoom, Egypt.
authors.forename: Heba A
authors.initials: HA
authors.lastname: El-Shekheby
authors.forename: Ahmed H
authors.initials: AH
authors.lastname: Mangood
authors.forename: Salem M
authors.initials: SM
authors.lastname: Hamza
authors.forename: Ahmed S
authors.initials: AS
authors.lastname: Al-Kady
authors.forename: El-Zeiny M
authors.initials: el-ZM
authors.lastname: Ebeid
mesh_terms: D003374:Coumarins / Q000737:chemistry*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D008628:Mercury / Q000032:analysis*; D053768:Metal Nanoparticles / Q000032:analysis*; D015394:Molecular Structure; D012834:Silver / Q000032:analysis*; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013696:Temperature
chemical_list: D003374:Coumarins; D005456:Fluorescent Dyes; D013438:Sulfhydryl Compounds; D012834:Silver; C030123:coumarin; D008628:Mercury
keywords: Chemosensor; Coumarin derivative; Fluorescence enhancement; Mercury (II) ion sensor; Silver (I) ion sensor; Silver nanoparticle