Surface molecularly imprinted polymers based ZnO quantum dots as fluorescence sensors for detection of diethylhexyl phthalate with high sensitivity and selectivity

2018 ◽  
Vol 67 (8) ◽  
pp. 1003-1010 ◽  
Author(s):  
Yangyang Wang ◽  
Zhiping Zhou ◽  
Wanzhen Xu ◽  
Yu Luan ◽  
Yi Lu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Molecularly Imprinted Polymers ◽  
High Sensitivity ◽  
Fluorescence Sensors ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Diethylhexyl Phthalate ◽  
Sensitivity And Selectivity ◽  
Zno Quantum Dots

scholarly journals Molecularly Imprinted Polymers-Coated CdTe Quantum Dots for Highly Sensitive and Selective Fluorescent Determination of Ferulic Acid

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Zhihong Wang ◽  
Ruiqing Long ◽  
Mijun Peng ◽  
Te Li ◽  
Shuyun Shi
Keyword(s):  
Quantum Dots ◽  
Ferulic Acid ◽  
Molecularly Imprinted Polymers ◽  
High Sensitivity ◽  
Complex Matrix ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Cdte Qds ◽  
Sensitive Determination

Ferulic acid (FA), an important phenolic acid, is widely distributed in higher plants and presents many pharmacological effects. Therefore, sensitive determination of FA in complex matrix is necessary. Molecularly imprinted polymers-coated CdTe quantum dots (CdTe-QDs@MIPs) exhibited incomparable advantages because of their combination of excellent selectivity of MIPs and high sensitivity of QDs. Here, a fluorescent probe based on CdTe-QDs@MIPs was successfully fabricated for selective and sensitive determination of FA. MIPs shell was obtained by the reverse microemulsion method using FA, 3-(aminopropyl) triethoxysilane (APTES), and tetraethyl orthosilicate (TEOS), as template, functional monomer, and crosslinker. In optimal conditions, the fluorescence CdTe-QDs@MIPs sensor exhibited fast response (within only 3 min), high sensitivity (limit of detection, LOD at 0.85 μg/l), excellent linear ranges (2–100 μg/l) with a correlation coefficient of 0.9996, and distinguished selectivity for FA. Satisfactory recoveries from 91.8% to 110.3% were achieved with precisions below 6.6% for FA analysis in real pineapple juice and apple juice by developed CdTe-QDs@MIPs. The fluorescence results coincided well with those obtained by high-performance liquid chromatography (HPLC). It could be concluded that the resultant CdTe-QDs@MIPs offered a new way for rapid and sensitive analysis of FA in the complex matrix.

scholarly journals Fast quantification of fluoroquinolones in environmental water samples using molecularly imprinted polymers coupled with internal extractive electrospray ionization mass spectrometry

RSC Advances ◽  
2018 ◽  
Vol 8 (31) ◽  
pp. 17293-17299 ◽  
Author(s):  
Wei Kou ◽  
Hua Zhang ◽  
Aisha Bibi ◽  
Mufang Ke ◽  
Jing Han ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Molecularly Imprinted Polymers ◽  
Water Samples ◽  
High Sensitivity ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Ionization Mass ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Sensitivity Method

A simple, fast and high-sensitivity method for quantification of fluoroquinolones in environmental water samples using MIPs-iEESI-MS.

scholarly journals Fluorescent Nanosensor based on Molecularly Imprinted Polymers Coated on Graphene Quantum Dots for Fast Detection of Antibiotics

2018 ◽  
Author(s):  
Tongchang Zhou ◽  
Arnab Halder ◽  
Yi Sun
Keyword(s):  
Quantum Dots ◽  
Fluorescence Intensity ◽  
Molecularly Imprinted Polymers ◽  
Limit Of Detection ◽  
Sol Gel ◽  
Graphene Quantum Dots ◽  
Carboxyl Groups ◽  
One Pot ◽  
Molecularly Imprinted ◽  
Imprinted Polymers

In this work, we firstly explored a mild, clean, and highly efficient approach for the synthesis of graphene quantum dots (GQDs). GQDs with carboxyl groups or amino groups, were prepared from one-pot environmentally friendly method assisted by hydrogen peroxide, respectively. It was proved that carboxyl groups played an important role in the fluorescence quenching. Based on these findings, we developed a novel fluorescent nanosensor by combining molecularly imprinted polymers (MIPs) with carboxyl functionalized GQDs for the determination of tetracycline (TC) in aqueous samples. The nanocomposite was prepared using a sol-gel process. GQDs-MIPs showed strong fluorescent emission at 410 nm when excited at 360 nm, which was subsequently quenched in the presence of TC. Under optimum conditions, the fluorescence intensity of GQDs-MIPs decreased in response to the increase of TC concentration with good linearity rage of 1.0-104 µg L-1. The limit of detection was determined to be 1 µg L-1. The fluorescence intensity of GQDs-MIPs was more strongly quenched by TC compared to the corresponding non-imprinted polymers, GQDs-NIPs. With the high sensitivity, the material was also successfully worked for the detection of TC in real spiked milk samples.

scholarly journals A magnetic fluorescence molecularly imprinted polymer sensor with selectivity for dibutyl phthalate via Mn doped ZnS quantum dots

RSC Advances ◽  
2017 ◽  
Vol 7 (81) ◽  
pp. 51632-51639 ◽  
Author(s):  
Wanzhen Xu ◽  
Tao Li ◽  
Weihong Huang ◽  
Yu Luan ◽  
Yanfei Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Molecularly Imprinted Polymer ◽  
Molecularly Imprinted Polymers ◽  
Dibutyl Phthalate ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Magnetic Quantum Dots ◽  
Mn Doped

In this work, magnetic quantum dots molecularly imprinted polymers were synthesized, which were based on ZnS and magnetic Fe3O4.

Sign in / Sign up

Export Citation Format

Share Document