Nitrogen-doped carbon quantum dots as a “turn off-on” fluorescence sensor based on the redox reaction mechanism for the sensitive detection of dopamine and alpha lipoic acid

Zhang, Ruxia; Fan, Zhefeng

doi:10.1016/j.jphotochem.2020.112438

Cited by 37 publications

(13 citation statements)

References 47 publications

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“…The HRTEM shown in the Figure S1A inset indicates that B,N-CQDs has a lattice spacing of 0.208 nm matching with that of (100) facet of graphite. , The XRD patterns show a broad band centered at 24° matching with that of the (002) facet of carbon-based material, indicating that B,N-CQDs have highly disordered carbon atoms (Figure S1C). ,,, XPS and FTIR characterizations were performed to analyze the components, surface groups, and structure of B,N-CQDs. The FTIR spectrum of B,N-CQDs shows that a peak of O–H/N–H stretching vibrations appears at 3448 cm –1 with a broad band.…”

Section: Resultsmentioning

confidence: 99%

High Quantum Yield Boron and Nitrogen Codoped Carbon Quantum Dots with Red/Purple Emissions for Ratiometric Fluorescent IO₄^– Sensing and Cell Imaging

Qin

Luo

et al. 2022

ACS Sustainable Chem. Eng.

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A facile and cost-effective hydrothermal method was developed for the preparation of boron and nitrogen codoped carbon quantum dots (B,N-CQDs) from 3-carboxyphenylboronic acid and o-phenylenediamine. The synthesized B,N-CQDs exhibit excellent properties such as excellent water solubility, strong fluorescence, good dispersion, and desirable stability. The average particle size of B,N-CQDs is 2.82 nm, and the absolute fluorescence quantum yield is 86.58%. The excitation wavelength of B,N-CQDs is 300 nm. Emission bands of B,N-CQDs appeared at 356 and 700 nm. Periodate (IO 4 − ) quenches B,N-CQDs emissions through chelation reaction. The ratio of F 356 / F 700 has a good linear relationship with the concentration of IO 4 − in the range of 0.01−40 μmol/L with the detection limit of 0.003 μmol/L. This method has the advantages of a low detection limit, high sensitivity, wide linear range, good selectivity, simplicity, and rapidness. It can be used as a ratiometric fluorescent probe for the detection of IO 4 − , and it was successfully applied in the analysis of IO 4 − in water. The cytotoxicity and biocompatibility of B,N-CQDs were evaluated and successfully applied in cell imaging.

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Section: Resultsmentioning

confidence: 99%

High Quantum Yield Boron and Nitrogen Codoped Carbon Quantum Dots with Red/Purple Emissions for Ratiometric Fluorescent IO₄^– Sensing and Cell Imaging

Qin

Luo

et al. 2022

ACS Sustainable Chem. Eng.

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“…Zhang et al [ 148 ] developed the first method resorting to spectroscopy to analyze alpha-lipoic acid (ALA) in real samples. This methodology was also used to determine dopamine (DA).…”

Section: Applicationsmentioning

confidence: 99%

You Don’t Learn That in School: An Updated Practical Guide to Carbon Quantum Dots

2021

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Carbon quantum dots (CQDs) have started to emerge as candidates for application in cell imaging, biosensing, and targeted drug delivery, amongst other research fields, due to their unique properties. Those applications are possible as the CQDs exhibit tunable fluorescence, biocompatibility, and a versatile surface. This review aims to summarize the recent development in the field of CQDs research, namely the latest synthesis progress concerning materials/methods, surface modifications, characterization methods, and purification techniques. Furthermore, this work will systematically explore the several applications CQDs have been subjected to, such as bioimaging, fluorescence sensing, and cancer/gene therapy. Finally, we will briefly discuss in the concluding section the present and future challenges, as well as future perspectives and views regarding the emerging paradigm that is the CQDs research field.

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“…Despite such evidence of the excellent operational efficiency of various stimuli-responsive polymer spacers, a similar redox-responsive PL switchable gold-QD system is so far not reported to the best of our knowledge. Notably, the ongoing development of redox-active systems is highly desirable in view of the growing demand for investigation of biological phenomena, e,g ., detecting enzymatic activity, maltose biosensing, dopamine, , and alpha lipoic acid …”

Section: Introductionmentioning

confidence: 99%

Polymeric Layer-Mediated Redox Sensing System Containing Covalently Attached CdSe/ZnS Quantum Dots on Au Films

Moradi

Staude

Pertsch

et al. 2023

ACS Appl. Nano Mater.

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Reversible photoluminescence (PL) switching represents a highly demanded feature in sensors, optical/electronic devices, imaging and logic gates, etc. Utilizing a straightforward spin-coating-based sample fabrication procedure, we developed a gold-quantum dot (QD) hybrid system that revealed PL switching in response to redox processes. The PL switching of the system relies on a redox-responsive poly[N-isopropylacrylamide-co-vinylferrocene-co-methacryloyl benzophenone] nanometric thick spacer layer, through which the QDs were attached to a gold film. The designed hybrid system revealed a 2.3 ± 0.6-fold PL intensity switching factor arising from PL quenching upon oxidation of the spacer layer and PL recovery after reducing the layer. Notably, the behavior was both reversible and reproducible, judged by analysis of three samples and several applied redox processes. This study can open a window to further development of plasmonic-fluorophore switchable devices using stimuli-responsive polymeric spacers in particular for sensing and bio-sensing applications.

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Nitrogen-doped carbon quantum dots as a “turn off-on” fluorescence sensor based on the redox reaction mechanism for the sensitive detection of dopamine and alpha lipoic acid

Cited by 37 publications

References 47 publications

High Quantum Yield Boron and Nitrogen Codoped Carbon Quantum Dots with Red/Purple Emissions for Ratiometric Fluorescent IO₄^– Sensing and Cell Imaging

High Quantum Yield Boron and Nitrogen Codoped Carbon Quantum Dots with Red/Purple Emissions for Ratiometric Fluorescent IO₄^– Sensing and Cell Imaging

You Don’t Learn That in School: An Updated Practical Guide to Carbon Quantum Dots

Polymeric Layer-Mediated Redox Sensing System Containing Covalently Attached CdSe/ZnS Quantum Dots on Au Films

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Nitrogen-doped carbon quantum dots as a “turn off-on” fluorescence sensor based on the redox reaction mechanism for the sensitive detection of dopamine and alpha lipoic acid

Cited by 37 publications

References 47 publications

High Quantum Yield Boron and Nitrogen Codoped Carbon Quantum Dots with Red/Purple Emissions for Ratiometric Fluorescent IO4– Sensing and Cell Imaging

High Quantum Yield Boron and Nitrogen Codoped Carbon Quantum Dots with Red/Purple Emissions for Ratiometric Fluorescent IO4– Sensing and Cell Imaging

You Don’t Learn That in School: An Updated Practical Guide to Carbon Quantum Dots

Polymeric Layer-Mediated Redox Sensing System Containing Covalently Attached CdSe/ZnS Quantum Dots on Au Films

Contact Info

Product

Resources

About

High Quantum Yield Boron and Nitrogen Codoped Carbon Quantum Dots with Red/Purple Emissions for Ratiometric Fluorescent IO₄^– Sensing and Cell Imaging

High Quantum Yield Boron and Nitrogen Codoped Carbon Quantum Dots with Red/Purple Emissions for Ratiometric Fluorescent IO₄^– Sensing and Cell Imaging