title: Surface Molecular Imprinting on Silica-Coated CdTe Quantum Dots for Selective and Sensitive Fluorescence Detection of p-aminophenol in Water.
abstract: In this paper, a selective and sensitive sensor for the determination of p-aminophenol (PAP) was developed by grafting molecularly imprinted polymers (MIPs) on the surface of silica-coated CdTe quantum dots (CdTe@SiO2@MIPs). The obtained CdTe@SiO2@MIPs were characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy and fluorescence spectroscopy. The fluorescence intensity of CdTe@SiO2@MIPs was more strongly quenched by PAP than that of the structural analogues of PAP. Under the optimal conditions, the fluorescence intensity of the CdTe@SiO2@MIPs decreased sensitively with the increase of PAP concentration in the range of 0.05-50 μM. The limit of detection was 0.02 μM (3σ/Ksv). The sensor was successfully used to determine PAP in tap and lake water samples, and the average recoveries of PAP at various spiking levels ranged from 97.33 % to 103.3 % with relative standard deviations below 20 %.
authors.affiliation: School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
authors.forename: Xialin
authors.initials: X
authors.lastname: Lu
authors.affiliation: School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
authors.forename: Fangdi
authors.initials: F
authors.lastname: Wei
authors.affiliation: School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
authors.forename: Guanhong
authors.initials: G
authors.lastname: Xu
authors.affiliation: School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
authors.forename: Yanzi
authors.initials: Y
authors.lastname: Wu
authors.affiliation: School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Yang
authors.affiliation: School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China. huqin@njmu.edu.cn.
authors.forename: Qin
authors.identifier: http://orcid.org/0000-0002-4077-8760
authors.initials: Q
authors.lastname: Hu
keywords: Fluorimetry; Silica-coated CdTe quantum dots; Surface molecular imprinting; p-aminophenol