A strong blue fluorescent nanoprobe based on Mg/N co-doped carbon dots coupled with molecularly imprinted polymer for ultrasensitive and highly selective detection of tetracycline in animal-derived foods

Hu, Xuelian; Zhao, Yueqing; Dong, Jingyuan; Liu, Chang; Qi, Ying; Fang, Guozhen; Wang, Shuo

doi:10.1016/j.snb.2021.129809

Cited by 79 publications

(22 citation statements)

References 36 publications

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“…The absorption peaks at 1728 cm –1 (CO), 1459 cm –1 (CC), and 1257 and 1154 cm –1 (CO) reveal the existence of cross-linker (EGDMA) and functional monomer (IL@CDs). In addition, as show in curves b and c, the position and intensity of the characteristic peaks have no significant difference between CDs/Eu 3+ @MIP and CDs/Eu 3+ @NIP. − …”

Section: Resultsmentioning

confidence: 84%

Sensitive Determination of Ofloxacin by Molecularly Imprinted Polymers Containing Ionic Liquid Functionalized Carbon Quantum Dots and Europium Ion

Wang

Zhou

Min

et al. 2022

ACS Appl. Nano Mater.

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Antibiotic pollution has become a serious problem due to concerns about sustainability and the environment. Ofloxacin (OFL) is an important antibiotic, which is used widely in the treatment of human and animal diseases, resulting in large-scale production and aggregation in the environment. A facile and high-performance method for detecting OFL is valuable for practical reasons. Herein, a novel CDs/Eu3+-based molecularly imprinted polymer fluorescent probe (CDs/Eu3+@MIP) was successfully synthesized using ionic liquid-functionalized carbon dots (IL@CDs) as the functional monomer and ofloxacin (OFL) as the template molecule. This probe exhibited excellent fluorescent properties. Under optimal conditions, CDs/Eu3+@MIP displayed outstanding detection performance for OFL. The limit of detection was as low as 0.25 nM. Furthermore, the detection mechanism of the fluorescent probe was also discussed. The lanthanide luminescence intensity increased significantly with the addition of OFL, which was observed as a deeper red color with the naked eye. The mechanism of detecting OFL was exposure to the efficient energy transfer from OFL to Eu3+ through the antenna effect. In particular, the probe demonstrated high selectivity toward OFL due to combining molecular imprinting technology. This first reported fluorescent sensing material based on CDs/Eu3+@MIP provides a promising scheme for highly sensitive detection of antibiotic OFL.

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Section: Resultsmentioning

confidence: 84%

Sensitive Determination of Ofloxacin by Molecularly Imprinted Polymers Containing Ionic Liquid Functionalized Carbon Quantum Dots and Europium Ion

Wang

Zhou

Min

et al. 2022

ACS Appl. Nano Mater.

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“…The traps on the surface of NGQDs, defect states and nonradiative relaxation can drop the excited electrons to the ground state without generating a photon to decrease the fluorescence intensity. 31,32 Therefore, some methods can be carried out to enhance fluorescence, such as modification or passivation of the surface of NGQDs and decreasing of specific groups that might promote the non-radiative recombination, such as carbonyl and alkylamines connected to the NGQDs. 32,34 Among all these, the passivation of the surface is the most accepted mechanism for fluorescence enhancement.…”

Section: The Proposed Mechanismmentioning

confidence: 99%

Nitrogen-doped graphene quantum dots coated with molecularly imprinted polymers as a fluorescent sensor for selective determination of warfarin

et al. 2022

New J. Chem.

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“…The functional groups in the monomer can be formed around the template molecules in a pre-polymerization which is locked in its conformation during cross-linking polymerization through non-covalent or covalent interactions. After that, the template molecules are removed from the binding sites, leaving the specific cavities and vacant recognition sites which are structurally similar to the original template [ 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. However, the complete removal of the templates from the MIPs can be incomplete or difficult to achieve despite extensive washing steps and prolonged processes with large volumes of desorption solvent.…”

Section: Introductionmentioning

confidence: 99%

Modification of Cotton Fabric with Molecularly Imprinted Polymer-Coated Carbon Dots as a Sensor for 17 α-methyltestosterone

2022

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Molecularly imprinted polymers@ethylenediamine-modified carbon dots grafted on cotton fabrics (MIPs@EDA-CDs/CF) and smartphone-based fluorescence image analysis were proposed and used for the first time for the detection of 17 α-methyltestosterone (MT). The EDA-CDs were synthesized and grafted on cotton fabric before coating with the MIPs. The MIPs were synthesized using the MT as a template molecule, methacrylic acid (MAA) as a functional monomer, ethylene glycol dimethacrylate (EGDMA) as a cross-linker, and azobisisobutyronitrile (AIBN) as an initiator. The MIPs@EDA-CDs/CF were characterized using FTIR, SEM-EDS, and RGB fluorescence imaging. The fluorescence images were also taken using a smartphone and the ImageJ program was used for RGB measurement. The Δ red intensity was linearly proportional to MT concentration in the range of 100 to 1000 μg/L (R2 = 0.999) with a detection limit of 44.4 μg/L and quantification limit of 134 μg/L. The MIPs@EDA-CDs/CF could be stored at 4 °C for a few weeks and could be reused twice. The proposed method could apply for the specific determination of MT in water and sediment samples along with satisfactory recoveries of 96–104% and an acceptable relative standard deviation of 1–6% at the ppb level.

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A strong blue fluorescent nanoprobe based on Mg/N co-doped carbon dots coupled with molecularly imprinted polymer for ultrasensitive and highly selective detection of tetracycline in animal-derived foods

Cited by 79 publications

References 36 publications

Sensitive Determination of Ofloxacin by Molecularly Imprinted Polymers Containing Ionic Liquid Functionalized Carbon Quantum Dots and Europium Ion

Sensitive Determination of Ofloxacin by Molecularly Imprinted Polymers Containing Ionic Liquid Functionalized Carbon Quantum Dots and Europium Ion

Nitrogen-doped graphene quantum dots coated with molecularly imprinted polymers as a fluorescent sensor for selective determination of warfarin

Modification of Cotton Fabric with Molecularly Imprinted Polymer-Coated Carbon Dots as a Sensor for 17 α-methyltestosterone

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