A highly efficient and selective turn-on fluorescent sensor for Hg2+, Ag+ and Ag nanoparticles based on a coumarin dithioate derivative

作者：El Shekheby Heba A; Mangood Ahmed H; Hamza Salem M; Al Kady Ahmed S; Ebeid El Zeiny M^*

来源：Luminescence, 2014, 29(2): 158-167.

DOI：10.1002/bio.2521

• Fluorescence enhancement
• Mercury (II) ion sensor
• Coumarin derivative
• Chemosensor
• Silver (I) ion sensor
• Silver nanoparticle

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 x 10(-5)-1.9 x 10(-5) mol/L, 0.1 x 10(-5)-2.3 x 10(-5) mol/L and 0.146 x 10(-12)-2.63 x 10(-12) mol/L for Hg2+, Ag+ and Ag nanoparticles, respectively. The interference effect of some anions and cations was also tested.

• 出版日期2014-3