Synthesis and characterization of an innovative molecular imprinted polymers based on CdTe QDs fluorescence sensing for selective detection of sulfadimidine

Fang, Qunxiang; Zhang, Liming; Yin, Haiqin; Wu, Changchun; Zhang, Wenwen; Huang, Weihong; Ni, Xiaoni

doi:10.1007/s10965-021-02714-8

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…Molecularly imprinted polymers (MIPs) are tailor-made biomimetic supramolecular receptors that recognize and bind target molecules with high affinity and selectivity, comparable to those of antibodies [ 13 ]. They possess many unique features such as easy preparation, cost-efficient, good stability, and reusability [ 14 ]. Due to these superior characteristics, MIPs as recognition elements have been combined with various electrochemical techniques for detecting various small molecules such as antibiotics [ 15 ], pesticides [ 16 ], and mycotoxins [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Rapid and Sensitive Detection of Sulfamethizole Using a Reusable Molecularly Imprinted Electrochemical Sensor

Kong

et al. 2023

Foods

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Efficient methods for monitoring sulfonamides (SAs) in water and animal-source foods are of great importance to achieve environmental safety and protect human health. Here, we demonstrate a reusable and label-free electrochemical sensor for the rapid and sensitive detection of sulfamethizole based on an electropolymerized molecularly imprinted polymer (MIP) film as the recognition layer. To achieve effective recognition, monomer screening among four kinds of 3-substituted thiophenes was performed by computational simulation and subsequent experimental evaluation, and 3-thiopheneethanol was finally selected. MIP synthesis is very fast and green, and can be in situ fabricated on the transducer surface within 30 min in an aqueous solution. The preparation process of the MIP was characterized by electrochemical techniques. Various parameters affecting MIP fabrication and its recognition response were investigated in detail. Under optimized experimental conditions, good linearity in the range of 0.001−10 μM and a low determination limit of 0.18 nM were achieved for sulfamethizole. The sensor showed excellent selectivity, which can distinguish between structurally similar SAs. In addition, the sensor displayed good reusability and stability. Even after 7 days of storage, or being reused 7 times, higher than 90% of the initial determination signals were retained. The practical applicability of the sensor was also demonstrated in spiked water and milk samples at the nM determination level with satisfactory recoveries. Compared to relevant methods for SAs, this sensor is more convenient, rapid, economical, and eco-friendly, and had comparable or even higher sensitivity, which offered a simple and efficient method for SA detection.

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Section: Introductionmentioning

confidence: 99%

Rapid and Sensitive Detection of Sulfamethizole Using a Reusable Molecularly Imprinted Electrochemical Sensor

Kong

et al. 2023

Foods

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“…On the contrary, fluorescence sensing method has the advantages of simple operation, high sensitivity, and good cost‐effectiveness, and it is prosperous used in the detection of metal ions, pesticides, and veterinary drugs (Khan et al, 2019; Moaddab & Ghasemi, 2021; Mondal et al, 2019; Yang et al, 2021). Most widely used fluorescent sensors for detecting Au 3+ or other metal ions include fluorescent metal nanoclusters (NCs; Song et al, 2019), organic dyes (Suna et al, 2022), semiconductor quantum dots (QDs; Zhu et al, 2017), fluorescent metal organic frameworks (MOFs; Wang et al, 2022), which may be restricted by their cytotoxicity, environmental unfriendly, high costs, and complex equipment and treatment processes.…”

Section: Introductionmentioning

confidence: 99%

Preparation of phosphorus‐doped cow milk‐derived carbon quantum dots and detection of Au³⁺

Zhang

Zhou

et al. 2023

J Food Process Engineering

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A new fluorescent probe based on phosphorus-doped cow milk-derived carbon quantum dots (P-CMCQDs) for the detection of Au 3+ was studied in water samples. P-CMCQDs were prepared by hydrothermal method with cow milk as carbon source and phosphoric acid as dopant. P-CMCQDs show green fluorescence under ultraviolet light and can be partially quenched by Au 3+ . However, the excellent fluorescence characteristics of P-CMCQDs-ascorbic acid (AA) were obtained and can be used to detect trace Au 3+ by simply mixing the P-CMCQDs with AA. The sensing mechanism is based on the reduction of Au 3+ to AuNPs by P-CMCQDs and AA, and then AuNPs induce the fluorescence quenching of P-CMCQDs through synergistic static quenching and internal filtering effect. The fluorescence intensity of P-CMCQDs-AA varies with the concentration of Au 3+ (10-140 μmol/L), the detection limit is 4.2 nmol/L, indicating that the P-CMCQD S -AA probe has excellent sensitivity. In the detection of Au 3+ in tap water and lake water, it is found that the recovery is between 99.6% and 100.5%, and the relative standard deviation is between 1.7% and 3.2%. This method is fast, efficient, and sensitive, and can be used to detect Au 3+ in actual water samples. Practical ApplicationsAlthough the element gold is chemically inert, soluble gold salts remaining in the environment in the form of ions are toxic and serious damage the peripheral nervous system, causing other health issues. Therefore, it seems necessary to design an efficient and sensitive method to detect Au 3+ in environment. Among many detection methods, fluorescence sensing method is more suitable for on-site, rapid detection.However, the complex system, high limit of detection and environmental pollution caused by metal luminescence limit its application. In this paper, the biomass P-CMCQDs was synthesized from cow milk by hydrothermal method. By adding AA in the synthesized P-CMCQDs, the limit of detection (LOD) was greatly improved, and the trace Au 3+ detection in tap water and lake water was highly selective and sensitive.

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Surface-enhanced Raman scattering based determination on sulfamethazine using molecularly imprinted polymers decorated with silver nanoparticles

et al. 2023

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Synthesis and characterization of an innovative molecular imprinted polymers based on CdTe QDs fluorescence sensing for selective detection of sulfadimidine

Cited by 6 publications

References 35 publications

Rapid and Sensitive Detection of Sulfamethizole Using a Reusable Molecularly Imprinted Electrochemical Sensor

Rapid and Sensitive Detection of Sulfamethizole Using a Reusable Molecularly Imprinted Electrochemical Sensor

Preparation of phosphorus‐doped cow milk‐derived carbon quantum dots and detection of Au³⁺

Surface-enhanced Raman scattering based determination on sulfamethazine using molecularly imprinted polymers decorated with silver nanoparticles

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Synthesis and characterization of an innovative molecular imprinted polymers based on CdTe QDs fluorescence sensing for selective detection of sulfadimidine

Cited by 6 publications

References 35 publications

Rapid and Sensitive Detection of Sulfamethizole Using a Reusable Molecularly Imprinted Electrochemical Sensor

Rapid and Sensitive Detection of Sulfamethizole Using a Reusable Molecularly Imprinted Electrochemical Sensor

Preparation of phosphorus‐doped cow milk‐derived carbon quantum dots and detection of Au3+

Surface-enhanced Raman scattering based determination on sulfamethazine using molecularly imprinted polymers decorated with silver nanoparticles

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Preparation of phosphorus‐doped cow milk‐derived carbon quantum dots and detection of Au³⁺