Abstract: In this work, Mn-doped Zn S quantum dots( QDs) coated by molecularly imprinted polymers (MIPs) were synthesized with atrazine as template molecule. The prepared MIPs-coated QDs were characterized by fluorescence spectrophotometer,fourier transform infrared spectrometry and high-resolution transmission electron microscope. This probe has been used to detect atrazine in water samples. The effects of fluorescence stability,binding time,solvent p H and selective adsorption on fluorescence quenching were investigated. Under optimal conditions,this method can detect down to 0.0012 μmol/L of atrazine in water with a linear range of 0.1 ~ 100 μmol/L. The recoveries of atrazine were 89.4%,90.3% and 95.6% with relative standard deviations of 2.6%, 3.8% and 5.8% (n = 5) at three adding concentration (0.5,5 and 50 μmol/L). The studies provided a general strategy to combine molecular imprinting technique and quantum dots, which is simple, rapid and highly selective and pretty desirable for the detection of pesticides in water samples.
Template and target information: atrazine
Author keywords: molecularly imprinting, quantum dot, fluorescence quenching, atrazine