Fe3+-functionalized carbon quantum dots: A facile preparation strategy and detection for ascorbic acid in rat brain microdialysates

Li, Linbo; Wang, Chao; Luo, Jingxuan; Guo, Quanwei; Liu, Kangyu; Liu, Kun; Zhao, Wenji; Lin, Yuqing

doi:10.1016/j.talanta.2015.08.003

Cited by 61 publications

(15 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electrons in the excited state of CQD were transferred to the unoccupied 3d orbital of Fe 3+ , resulting in obvious fluorescence quenching of the CQDs [52] . The involvement of HEDP dissociated Fe 3+ from the complexes and blocked this process at the same time [53] . Then, restoration of PL intensity occurred spontaneously.…”

Section: Resultsmentioning

confidence: 99%

The synthesis and modification of highly fluorescent carbon quantum dots for reversible detection of water‐soluble phosphonate‐1‐hydroxyethane‐1,1‐diphosphonic acid by fluorescence spectroscopy

et al. 2020

View full text Add to dashboard Cite

Photoluminescent (PL) carbon quantum dots (CQDs) were prepared successfully using a facile and green procedure. They exhibited striking blue fluorescence and excellent optical properties, with a quantum yield as high as 61.44%. Due to the fluorescence quenching effect and the stronger complexing ability of the phosphoric acid group of 1‐hydroxyethane‐1,1‐diphosphonic acid (HEDP) to Fe3+, CQDs doped with Fe3+ were adequately constructed as an efficient and sensitive fluorescent probe for HEDP‐specific sensing. The proposed fluorescent probe had a sensitive and rapid response in the range 5–70 μM. Furthermore, quantitative molecular surface (QMS) analysis based on the Multiwfn program was applied to explore the complexation mode of HEDP and metal ions. The distribution of electrostatic potential (ESP), average local ionization energy (ALIE), the minimum value points and the position of the lone pair electrons on the surface of molecular van der Waals were further determined. More strikingly, this experiment achieved the quantitative detection of water‐soluble phosphonate‐HEDP, for the first time using fluorescence spectrometry. It has been proved to be an effective and intuitive sensing method for the detection of HEDP in real samples.

show abstract

Section: Resultsmentioning

confidence: 99%

The synthesis and modification of highly fluorescent carbon quantum dots for reversible detection of water‐soluble phosphonate‐1‐hydroxyethane‐1,1‐diphosphonic acid by fluorescence spectroscopy

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The negative control was replaced with three buffers to be tested. Because there may be Fe (3+) in the magnetic beads and Fe (3+) can tightly chelate to the surface of CQDs by the hydroxyl group to form Fe (3+) -functionalized CQDs while the fluorescence of CQDs can be effectively quenched by Fe (3+) via fluorescence resonance energy transfer, 31 and we chose to detect the fluorescence signal in the supernatant in this study. In this experiment, the difference between the fluorescence signal in the supernatant in the negative control and the fluorescence signal in the supernatant in the positive sample was quantified, and a standard curve was drawn.…”

Section: Methodsmentioning

confidence: 99%

Simultaneous Detection of Three Foodborne Pathogens Based on Immunomagnetic Nanoparticles and Fluorescent Quantum Dots

et al. 2020

View full text Add to dashboard Cite

This paper presents a peptide-mediated immunomagnetic separation technique and an immunofluorescence quantum dot technique for simultaneous and rapid detection of Escherichia coli O157:H7 , Staphylococcus aureus , and Vibrio parahaemolyticus . First, three peptides that can specifically recognize the three foodborne pathogens were combined with magnetic nanoparticles to form an immunomagnetic nanoparticle probe for capturing three kinds of target bacteria and then added three quantum dot probes (quantum dots-aptamer), which formed a sandwich composite structure. When the three quantum dot probes specifically combined with the three pathogenic bacteria, the remaining fluorescent signal in the supernatant will be reduced by magnetic separation. Therefore, the remaining fluorescent signal in the supernatant can be measured with a fluorescence spectrophotometer to indirectly determine the three pathogens in the sample. The linear range of the method was 10–10 7 cfu/mL, and in the buffer, the detection limits of E. coli O157:H7 , S. aureus , and V. parahaemolyticus were 2.460, 5.407, and 3.770 cfu/mL, respectively. In the tap water simulation, the detection limits of E. coli O157:H7 , S. aureus , and V. parahaemolyticus were 2.730, 1.990 × 10 1 , and 4.480 cfu/mL, respectively. In the milk simulation sample, the detection limits of E. coli O157:H7 , S. aureus , and V. parahaemolyticus were 6.660, 1.070 × 10 1 , and 2.236 × 10 1 cfu/mL, respectively. The method we presented can detect three kinds of foodborne pathogens at the same time, and the entire experimental process did not exceed 4 h. It has high sensitivity and low detection limit and may be used in the sample detection of other pathogens.

show abstract

“…A unique combination of magnetic nanoparticles and diverse carbohydrate bioactivities is needed to develop a safety system based on magnetic glyco-nanoparticle (MGNP). MGNPs are used for the first time to detect, quantify, and differentiate E. coli cells and can provide a new arena for applications in decontamination and food safety ( 91 , 92 ).…”

Section: Biocompatible Nanomaterials In Food Safety and Qualitymentioning

confidence: 99%

Biocompatible Nanomaterials in Food Science, Technology, and Nutrient Drug Delivery: Recent Developments and Applications

et al. 2022

View full text Add to dashboard Cite

show abstract

Fe3+-functionalized carbon quantum dots: A facile preparation strategy and detection for ascorbic acid in rat brain microdialysates

Cited by 61 publications

References 42 publications

The synthesis and modification of highly fluorescent carbon quantum dots for reversible detection of water‐soluble phosphonate‐1‐hydroxyethane‐1,1‐diphosphonic acid by fluorescence spectroscopy

The synthesis and modification of highly fluorescent carbon quantum dots for reversible detection of water‐soluble phosphonate‐1‐hydroxyethane‐1,1‐diphosphonic acid by fluorescence spectroscopy

Simultaneous Detection of Three Foodborne Pathogens Based on Immunomagnetic Nanoparticles and Fluorescent Quantum Dots

Biocompatible Nanomaterials in Food Science, Technology, and Nutrient Drug Delivery: Recent Developments and Applications

Contact Info

Product

Resources

About