Facile synthesis of yellowish-green emitting carbon quantum dots and their applications for phoxim sensing and cellular imaging

Huo, Xingyan; Liu, Lizhen; Bai, Yunfeng; Qin, Jun; Yuan, Lin; Feng, Feng

doi:10.1016/j.aca.2021.338685

Cited by 27 publications

(7 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To further analyze the surface group and chemical structure of the N‐CQDs, fourier transform infrared (FTIR) and X‐ray photoelectron spectroscopy (XPS) were performed. FTIR spectrum of the N‐CQDs was shown in Figure 3b, showing characteristic bands of ‐OH/N−H, C=O/C=C, C−N, C−O−C, and C−O at 3420, 1580, 1393, 1273 and 1074 cm −1 , respectively [37,38] . The FTIR results validated the N‐CQDs embedding of the carboxyl, hydroxyl, and amino groups.…”

Section: Resultsmentioning

confidence: 58%

“…FTIR spectrum of the N-CQDs was shown in Figure 3b, showing characteristic bands of -OH/NÀ H, C=O/C=C, CÀ N, CÀ OÀ C, and CÀ O at 3420, 1580, 1393, 1273 and 1074 cm À 1 , respectively. [37,38] The FTIR results validated the N-CQDs embedding of the carboxyl, hydroxyl, and amino groups. The presence of hydrophilic groups on the N-CQDs, especially OÀ H and C=O, ensures their hydrophilicity and stability in aqueous systems.…”

Section: Chemistryselectmentioning

confidence: 59%

See 1 more Smart Citation

Efficient Synthesis of Highly Photo‐stable N‐doped Carbon Quantum Dots and their Applications in Detection and Cellular Imaging of Mercury Ions

Yin

Sun

et al. 2022

ChemistrySelect

View full text Add to dashboard Cite

In this work, the nitrogen doped carbon quantum dots (N‐CQDs) were synthesized by a simple microwave hydrothermal method using citric acid (carbon source) and urea (dopant) and optimized the preparation conditions by orthogonal tests. The synthesized N‐CQDs emitted a bright blue fluorescence with specific selectivity for Hg2+. The study revealed a static quenching mechanism of Hg2+ on the N‐CQDs. The N‐CQDs showed good linear correlation in the range of 0–120 μM for the detection of Hg2+ with a low detection limit of 22.50 nM. We also demonstrated the suitability of the N‐CQDs for the detection of Hg2+ in tap water and industrial wastewater with spiked recoveries of 97.56 %–103.58 %. In addition, the synthesized N‐CQDs with high fluorescence intensity, good optical stability and biocompatibility were successfully applied to fluorescent inks and imaging of Hela cells. This indicated that the synthesized N‐CQDs have promising applications in Hg2+ detection, bioimaging, and fluorescence anti‐counterfeiting.

show abstract

Section: Resultsmentioning

confidence: 58%

Section: Chemistryselectmentioning

confidence: 59%

Efficient Synthesis of Highly Photo‐stable N‐doped Carbon Quantum Dots and their Applications in Detection and Cellular Imaging of Mercury Ions

Yin

Sun

et al. 2022

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…In particular, phenylenediamines and diaminonaphthalenes were exploited for achieving different emission colors (Table ). For example, several green fluorescent CDs have been prepared by hydrothermal treatment of citric acid with p -phenylenediamine. ,− Yuan et al obtained five different CDs, exhibiting fluorescence from blue to red, by ethanol solvothermal treatment of 1,5-diaminonaphthalene or 2,3-diaminonaphthalene and different reaction conditions (Figure ). …”

Section: Ca-cd Classesmentioning

confidence: 99%

Citric Acid-Based Carbon Dots and Their Application in Energy Conversion

Vallan

Imahori

2022

ACS Appl. Electron. Mater.

View full text Add to dashboard Cite

Carbon dot (CD) is a general term that encompasses a plethora of organic materials obtained from different reagents and different synthetic routes. Beyond this variety, carbonization has been considered for a long time as the essential process whereby completely different precursors converge into the formation of nanosized particles with resembling optical properties. In particular, CDs’ outstanding fluorescence emission is frequently attributed to the existence of large aromatic structures with extended conjugation. Nevertheless, thanks to the contribution of an increasing number of publications, nowadays the impact of these structures on the fluorescence emission has been considerably downsized. In some cases, their existence is even highly questionable. In return, in these years, more solid interpretations have been provided, according to which the chemical and emissive nature of CDs is strictly specific to the combination of synthetic precursors employed. Moreover, researchers have become more aware of the complexity of these systems, which contain not only nanoparticles but also single molecules, oligomers, and aggregates with their own fluorescent behavior. Therefore, we dedicate the first part of this review to the individual examination of different classes of citric acid-based CDs as a benchmarking CD class. A classification based on the precursors is meant to help the reader to find a common thread between the structural and optical properties of CDs. In the second part, we discuss the employment of citric acid-based CDs for energy conversion applications. This includes their exploitation as components of light-emitting diodes (LEDs), as photocatalysts for hydrogen generation and pollutant degradation, and as additives in several types of organic photovoltaic devices.

show abstract

“…The concentration of all species was maintained at 40 mmol L −1 . After optimization of the experimental conditions, the sensing was performed, following a well-established assay 41 Briefly, 500 μL of prepared B,N-Cdot (5.0 μg mL −1 ) were transferred to a quartz cuvette, and aliquots of NaNO 2 stock solution (concentrations of 0.1, 0.01, and 0.001 mol L −1 ) and PBS solution pH 7.4 were added, resulting in a final volume of 2 mL for all samples and obtaining a NO 2 − range varying from 0.00 to 50.00 (mmol L −1 ). The emission spectra were recorded after 2 min of incubation at 340 nm excitation, and the PL intensity at 435 nm was used for NO 2 − quantification.…”

Section: Sensing Experimentsmentioning

confidence: 99%

Doped Carbon Quantum Dots/PVA Nanocomposite as a Platform to Sense Nitrite Ions in Meat

Carneiro

Oliveira

Rodrigues

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

A sensor device based on doped-carbon quantum dots is proposed herein for detection of nitrite in meat products by fluorescence quenching. For the sensing platform, carbon quantum dots doped with boron and functionalized with nitrogen (B,N-Cdot) were synthesized with an excellent 44.3% quantum yield via a one-step hydrothermal route using citric acid, boric acid, and branched polyethylenimine as carbon, boron, and nitrogen sources, respectively. After investigation of their chemical structure and fluorescent properties, the B,N-Cdot at aqueous suspensions showed high selectivity for NO2 – in a linear range from 20 to 50 mmol L–1 under optimum conditions at pH 7.4 and a 340 nm excitation. Furthermore, the prepared B,N-Cdots successfully detected NO2 – in a real meat sample with recovery of 91.4–104% within the analyzed range. In this manner, a B,N-Cdot/PVA nanocomposite film with blue emission under excitation at 360 nm was prepared, and a first assay detection of NO2 – in meat products was tested using a smartphone application. The potential application of the newly developed sensing device containing a highly fluorescent probe should aid in the development of a rapid and inexpensive strategy for NO2 – detection.

show abstract

Facile synthesis of yellowish-green emitting carbon quantum dots and their applications for phoxim sensing and cellular imaging

Cited by 27 publications

References 44 publications

Efficient Synthesis of Highly Photo‐stable N‐doped Carbon Quantum Dots and their Applications in Detection and Cellular Imaging of Mercury Ions

Efficient Synthesis of Highly Photo‐stable N‐doped Carbon Quantum Dots and their Applications in Detection and Cellular Imaging of Mercury Ions

Citric Acid-Based Carbon Dots and Their Application in Energy Conversion

Doped Carbon Quantum Dots/PVA Nanocomposite as a Platform to Sense Nitrite Ions in Meat

Contact Info

Product

Resources

About