title: Synthesis of molecularly imprinted carbon dot grafted YVO4:Eu(3+) for the ratiometric fluorescent determination of paranitrophenol.
abstract: A facilely prepared ratiometric fluorescent molecularly imprinted sensor has been constructed for highly sensitive and selective detection of 4-nitrophenol (4-NP) using carbon dots (CDs) as the target sensitive fluorophore and YVO4: Eu(3+) nanoparticles (NPs) as the reference fluorophore. Through the hydrolysis and condensation reactions of the silica precursor, CDs and YVO4 Eu(3+) NPs can be incorporated into silica networks through silylation reaction by one pot synthesis procedure. The as-prepared fluorescent molecularly imprinted sensor shows characteristic fluorescence emissions of CDs (blue) and YVO4:Eu(3+) (red) under a single excitation wavelength. With the addition of 4-NP, the fluorescence of CDs is selectively quenched, resulting in the ratiometric fluorescence response. Under optimum conditions, the proposed sensor exhibits a high sensitivity with a linear range from 0 to 12.0μM and shows the limit of detection as low as 0.15μM in the determination of 4-NP, which is probably benefits from the tailor-made imprinted cavities for binding 4-NP. Furthermore, the proposed method was successfully applied for the determination of 4-NP in real water samples and human urine samples with great potentials for monitoring of 4-NP in environmental application.
authors.affiliation: Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642 China.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.affiliation: Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642 China.
authors.forename: Haoran
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642 China.
authors.forename: Shi
authors.initials: S
authors.lastname: Chen
authors.affiliation: Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642 China. Electronic address: tliuyl@scau.edu.cn.
authors.forename: Yingliang
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642 China.
authors.forename: Jianle
authors.initials: J
authors.lastname: Zhuang
authors.affiliation: Guangdong Provincial Engineering Technology Research Center for Optical Agriculture, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642 China. Electronic address: tleibf@scau.edu.cn.
authors.forename: Bingfu
authors.initials: B
authors.lastname: Lei
mesh_terms: D002244:Carbon / Q000737:chemistry*; D005063:Europium / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D054802:Molecular Imprinting / Q000379:methods*; D009596:Nitrophenols / Q000032:analysis* / Q000737:chemistry; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence / Q000379:methods*; D017968:Vanadium Compounds / Q000737:chemistry
chemical_list: D009596:Nitrophenols; D017968:Vanadium Compounds; D005063:Europium; D002244:Carbon; C024836:4-nitrophenol
keywords: 4-Nitrophenol; Carbon dot; Molecularly imprinted; Sensor; YVO(4):Eu(3+)