Fluorescent N, S co-doped carbon dots for tartrazine sensing and mechanistic perception of their radical scavenging activity

Shaik, Md Abdus Salam; Samanta, Dibyendu; Shaw, Manisha; Mondal, Imran; Basu, Rajarshi; Pathak, Amita

doi:10.1016/j.snr.2022.100127

Cited by 14 publications

(9 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The antioxidation activity% of CND samples was calculated using eq 3 . 20 , 21 where A 0 and A c are the absorbances of the DPPH radical at 517 nm in the absence and presence of CNDs, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…As an established method of evaluating the antioxidation capability of CNDs, DPPH radical scavenging assay was used in which the UV–vis absorbance change of DPPH radical solution was monitored at 517 nm upon the addition of CNDs. , Different CND concentrations were prepared in deionized water, incubated with a solution of DPPH (0.02 mg/mL in methanol), and mixed simultaneously under dark conditions for 2 h. Finally, the UV–vis absorbance of each solution was measured at 517 nm. The antioxidation activity% of CND samples was calculated using eq . , where A 0 and A c are the absorbances of the DPPH radical at 517 nm in the absence and presence of CNDs, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…For instance, N and S have been demonstrated to regulate the antioxidation potential of CNDs through several proposed mechanisms, such as hydrogen atom transfer or proton-coupled electron transfer, in various acidic media. 20 , 21 Zhang et al conducted a study of the radical scavenging potential of N, S codoped CNDs employing various techniques, including UV–vis-based and electrochemical assays. They concluded that a synergistic effect of both N and S as dopant elements could promote the radical scavenging abilities of these CNDs by providing greater electronegativity difference and defect production, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Nitrogen (N), phosphorus (P), boron (B), and sulfur (S) are the closest neighbors to carbon (C) in the periodic table, which have been applied widely for doping different types of CNDs, converting them to practical tools for a broader range of applications. − The antioxidation potency of CNDs is also influenced by the dopant elements. For instance, N and S have been demonstrated to regulate the antioxidation potential of CNDs through several proposed mechanisms, such as hydrogen atom transfer or proton-coupled electron transfer, in various acidic media. , Zhang et al conducted a study of the radical scavenging potential of N, S codoped CNDs employing various techniques, including UV–vis-based and electrochemical assays. They concluded that a synergistic effect of both N and S as dopant elements could promote the radical scavenging abilities of these CNDs by providing greater electronegativity difference and defect production, respectively …”

Section: Introductionmentioning

confidence: 99%

“…The antioxidation activity% of CND samples was calculated using eq 3. 20,21 A A A Antioxidation activity (%) 100…”

Section: ■ Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of Doping Heteroatoms on the Optical Behaviors and Radical Scavenging Properties of Carbon Nanodots

et al. 2023

View full text Add to dashboard Cite

Heteroatom doping is regarded as a promising method for controlling the optoelectronic properties of carbon nanodots (CNDs), notably their fluorescence and antioxidation activities. In this study, phosphorous (P) and boron (B) are doped at different quantities in the CNDs’ structures to investigate their effects on the optical and antioxidation properties. Both the dopants can enhance light absorption and fluorescence, yet via different approaches. After doping, the UV–vis absorption of high P%-CNDs demonstrated a slight blue shift (348–345 nm), while the high B%-CNDs showed a minor red shift (348–351 nm), respectively. The fluorescence emission wavelength of doped CNDs changes marginally while the intensity increases significantly. Structural and composition characterizations show elevated levels of C=O on the surface of high P%-CND compared to low P%-CNDs. In B-doped CNDs, more NO 3 – functional groups and O–C=O bonds and fewer C–C bonds form at the surface of high B%-CNDs compared to the low B%-CNDs. A radical scavenging study using 2,2-diphenyl-1-picrylhydrazyl (DPPH) was carried out for all CNDs. It was found that the high B%-CNDs exhibited the highest scavenging capacity. The effects of the atomic properties of dopants and the resulting structures of CNDs, including atomic radius, electronegativity, and bond lengths with carbon, on the optoelectronic property and antioxidative reactions of CNDs are comprehensively discussed. It suggests that the effect of P-doping has a major impact on the carbogenic core structure of the CNDs, while the B-doping mainly impacts the surface functionalities.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The antioxidation activity% of CND samples was calculated using eq 3. 20,21 A A A Antioxidation activity (%) 100…”

Section: ■ Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of Doping Heteroatoms on the Optical Behaviors and Radical Scavenging Properties of Carbon Nanodots

et al. 2023

View full text Add to dashboard Cite

show abstract

Carbon Dots as a Fluorescent Probe for Appraising Morphology‐Dependent Free‐Radical‐Scavenging Properties of CuO Nanostructures

et al. 2023

Self Cite

View full text Add to dashboard Cite

Free radical scavenging property of different ligand directed nanostructures of CuO (rod‐, sphere, flower‐, and star‐shaped) prepared through aqueous based chemical precipitation route using various carboxylic acids (viz. tartaric acid, citric acid and acetic acid) have been investigated using N,S co‐doped carbon dots (NSCDs) as a novel fluorescent probe which is validated through diphenyl‐1‐picrylhydrazyl (DPPH) free radical scavenging assay and EPR study. The rod shaped nanostructures having the highest negative surface potential and lowest BET surface area compared to other morphologies, were found to show the highest radical scavenging ability which was corroborated with the maximum decrease of the DPPH absorption peak in UV‐vis spectra, largest attenuation of the DPPH free radical signal in EPR intensity and the maximum quenching of the fluorescent intensity of the NSCDs probe.

show abstract

Functionalized Carbon Quantum Dots Derived from Zelkova serrata Plant Leaves for the Detection of Normetanephrine in Geriatric Plasma Samples and ROS-Induced Antibacterial Applications Using a Plausible Mechanistic Approach

Poojitha,

Chellasamy,

Govindaraju

et al. 2024

BioChip J

View full text Add to dashboard Cite

Fluorescent N, S co-doped carbon dots for tartrazine sensing and mechanistic perception of their radical scavenging activity

Cited by 14 publications

References 49 publications

Effect of Doping Heteroatoms on the Optical Behaviors and Radical Scavenging Properties of Carbon Nanodots

Effect of Doping Heteroatoms on the Optical Behaviors and Radical Scavenging Properties of Carbon Nanodots

Carbon Dots as a Fluorescent Probe for Appraising Morphology‐Dependent Free‐Radical‐Scavenging Properties of CuO Nanostructures

Functionalized Carbon Quantum Dots Derived from Zelkova serrata Plant Leaves for the Detection of Normetanephrine in Geriatric Plasma Samples and ROS-Induced Antibacterial Applications Using a Plausible Mechanistic Approach

Contact Info

Product

Resources

About