Rapid microwave-assisted synthesis of molecularly imprinted polymers on carbon quantum dots for fluorescent sensing of tetracycline in milk

Hou, Juan; Li, Huiyu; Wang, Long; Zhang, Ping; Zhou, Tianyu; Ding, Hong; Liu, Ding

doi:10.1016/j.talanta.2015.08.024

Cited by 206 publications

(59 citation statements)

References 42 publications

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“…It is of great significance and importance to explore a mild, clean, and highly efficient approach for the synthesis of GQDs. Generally, GQDs were synthesized by traditional methods such as electrochemical exfoliation [22], chemical oxidation [23] and microwave assisted methods [24]. Strong acids and chemicals are often involved as oxidant in most approaches.…”

Section: Green Synthesis Of Gqdsmentioning

confidence: 99%

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

Zhou

Halder²,

Sun

2018

Preprint

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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.

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Section: Green Synthesis Of Gqdsmentioning

confidence: 99%

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

Zhou

Halder²,

Sun

2018

Preprint

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“…In addition, these methods may require some pre-processing, which will increase the possibility of error in the experiment. Compared to these techniques, fluorescence analysis has the characteristic advantage of high sensitivity, and it has become an effective method in the field of analysis [17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Fluorescence Sensing of Caffeine in Tea Beverages with 3,5-diaminobenzoic Acid

et al. 2020

Sensors

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A rapid, selective and sensitive method for the detection of caffeine in tea infusion and tea beverages are proposed by using 3,5-diaminobenzoic acid as a fluorescent probe. The 3,5-diaminobenzoic acid emits strong fluorescence around 410 nm under the excitation of light at 280 nm. Both the molecular electrostatic potential analysis and fluorescent lifetime measurement proved that the existence of caffeine can quench the fluorescence of 3,5-diaminobenzoic acid. Under the optimal experimental parameters, the 3,5-diaminobenzoic acid was used as a fluorescent probe to detect the caffeine aqueous solution. There exists a good linear relationship between the fluorescence quenching of the fluorescent probe and the concentration of caffeine in the range of 0.1–100 μM, with recovery within 96.0 to 106.2%, while the limit of detection of caffeine is 0.03 μM. This method shows a high selectivity for caffeine. The caffeine content in different tea infusions and tea beverages has been determined and compared with the results from HPLC measurement.

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“…Another challenge with CQD-based biosensors is the lack of selectivity, which makes it difficult to detect trace amounts of a specific analyte in complicated matrices. In order to improve the specificity, it is of great interest to combine molecularly imprinted polymers (MIPs) with CQDs [15][16][17]. The MIPs are prepared by the polymerization of the functional monomer, cross-linker, and initiator in the presence of a template.…”

Section: Introductionmentioning

confidence: 99%

Fluorometric determination of doxycycline based on the use of carbon quantum dots incorporated into a molecularly imprinted polymer

et al. 2018

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Rapid microwave-assisted synthesis of molecularly imprinted polymers on carbon quantum dots for fluorescent sensing of tetracycline in milk

Cited by 206 publications

References 42 publications

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

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

Fluorescence Sensing of Caffeine in Tea Beverages with 3,5-diaminobenzoic Acid

Fluorometric determination of doxycycline based on the use of carbon quantum dots incorporated into a molecularly imprinted polymer

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