Water-Soluble Polymer Functionalized CdTe/ZnS Quantum Dots: A Facile Ratiometric Fluorescent Probe for Sensitive and Selective Detection of Nitroaromatic Explosives

Graphical Smooth revelation : A new type of water-soluble CdTe/ZnS quantum dot has been employed to construct a ratiometric fluorescent nanosensor for the detection of nitroexplosives in aqueous media (see scheme). The observed ratiometric fluorescence intensity change allows the quantitative detection of picric acid with a limit of 9 n M . (PA=picric acid; ET=electron transfer.) A ratiometric fluorescent probe based on dual luminescence QD/CPL for selective sensing of the nitroaromatic explosive picric acid (PA) was constructed. The observed ratiometric fluorescence intensity change allows the quantitative detection of PA with a detection limit of 9 n M .