N and S doped carbon dots as novel probes with fluorescence enhancement for fast and sensitive detection of Cr(VI)

Chen, Yang; Cui, Huijing; Wang, Mao; Yang, Xudong; Pang, Shujie

doi:10.1016/j.colsurfa.2021.128164

Cited by 19 publications

(12 citation statements)

References 59 publications

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“…The average fluorescence lifetime of the CPDs increased from 2.75 ns to 3.13 ns after adding hydrazine hydrate, which was due to a non-radiative transition, so two mechanisms, such as Förster resonance energy transfer (FRET) and chelated fluorescence enhancement (CHEP), can be excluded. 71 The average fluorescence lifetime of the CPDs was 2.75 ns, and the average fluorescence lifetime of CPDs@PVA was 1.78 ns, with a slight decrease in fluorescence lifetime after film formation.…”

Section: Resultsmentioning

confidence: 92%

Fe-doped carbonized polymer dot-based fluorescent sensor with “turn-on” property for hydrazine hydrate detection

Miao

et al. 2022

Dalton Trans.

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Section: Resultsmentioning

confidence: 92%

Fe-doped carbonized polymer dot-based fluorescent sensor with “turn-on” property for hydrazine hydrate detection

Miao

et al. 2022

Dalton Trans.

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“…Briefly, 1.5 g citric acid, 0.75 g urea, and 0.75 g thiourea were mixed with 8 mL of water. Stirred well and microwave irradiated under 750 watts for 2 minutes until a bright orange‐coloured syrupy liquid formed with the evolution of H 2 S gas [26,27] . The digital photograph of the synthesized SNCD crude is shown in Figure S1 .…”

Section: Methodsmentioning

confidence: 99%

“…The synthesis of SNCD was carried out via microwave-assisted method as per the reported protocol [26,27] with slight modification using citric acid, urea, and thiourea as the sources of carbon, nitrogen, and sulphur, respectively. The experimental conditions were optimized as reported in the experimental section) to get finely tuned bright green fluorescence emitting SNCDs.…”

Section: Synthesis and Characterization Of Sncdmentioning

confidence: 99%

Ferric Ions Modulated Carbon Dots as a Fluorescent Probe for the Detection of Neopterin: An Inflammatory Prognostic Marker for Risk Prediction and Severity of Covid‐19

Anju,

Asokan,

Varghese

et al. 2023

ChemistrySelect

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Neopterin (NPT) is a Guanosine Tri Phosphate (GTP) metabolite produced by activated macrophages and is considered a proinflammatory and atherosclerotic agent. Beyond this NPT is a multi-utility biomarker for assessing the status of various diseases including cardiovascular disease, depression, and malignant tumors as well as infections including viral and bacterial origin. Recent clinical investigations suggest the use NPT as a prognostic marker for the early prediction of the severity of Covid-19, which is the prime concern of global public health. One of the main immunopathological characteristics of Covid-19 is an excessive inflammatory response, and the severity of the infection is linked with macrophage activation syndrome (MAS). Hence the assessment of neopterin serves as an effective diagnostic tool for the risk prediction of Covid-19. We present a fluorescence turn-on sensor for neopterin using ferric ion-modulated sulfur and nitrogen co-doped carbon quantum dots. The linear detection of NPT was achieved with a limit of detection of 3.11 nM.

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“…The CDs-HS18-based fast and selective sensing platform displayed an outstanding linear relation for Cr 6+ between 0 and 9 µM, with a limit of detection of 36 nM. A majority of reported Cr 6+ sensors are based on the fluorescence quenching method, whereas the one reported by Chen et al [ 180 ] is performed by the fluorescence enhancement mechanism. Results of TEM, FTIR, X-ray photoelectron spectroscopy, and XRD analysis revealed that Cr 6+ could increase the probe’s fluorescence.…”

Section: Applications Of Cdsmentioning

confidence: 99%

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

Pundi

Chang

2022

Polymers

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Although there is significant progress in the research of carbon dots (CDs), some challenges such as difficulty in large-scale synthesis, complicated purification, low quantum yield, ambiguity in structure-property correlation, electronic structures, and photophysics are still major obstacles that hinder the commercial use of CDs. Recent advances in synthesis, modification, characterization, and applications of CDs are summarized in this review. We illustrate some examples to correlate process parameters, structures, compositions, properties, and performances of CDs-based materials. The advances in the synthesis approach, purification methods, and modification/doping methods for the synthesis of CDs are also presented. Moreover, some examples of the kilogram-scale fabrication of CDs are given. The properties and performance of CDs can be tuned by some synthesis parameters, such as the incubation time and precursor ratio, the laser pulse width, and the average molar mass of the polymeric precursor. Surface passivation also has a significant influence on the particle sizes of CDs. Moreover, some factors affect the properties and performance of CDs, such as the polarity-sensitive fluorescence effect and concentration-dependent multicolor luminescence, together with the size and surface states of CDs. The synchrotron near-edge X-ray absorption fine structure (NEXAFS) test has been proved to be a useful tool to explore the correlation among structural features, photophysics, and emission performance of CDs. Recent advances of CDs in bioimaging, sensing, therapy, energy, fertilizer, separation, security authentication, food packing, flame retardant, and co-catalyst for environmental remediation applications were reviewed in this article. Furthermore, the roles of CDs, doped CDs, and their composites in these applications were also demonstrated.

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N and S doped carbon dots as novel probes with fluorescence enhancement for fast and sensitive detection of Cr(VI)

Cited by 19 publications

References 59 publications

Fe-doped carbonized polymer dot-based fluorescent sensor with “turn-on” property for hydrazine hydrate detection

Fe-doped carbonized polymer dot-based fluorescent sensor with “turn-on” property for hydrazine hydrate detection

Ferric Ions Modulated Carbon Dots as a Fluorescent Probe for the Detection of Neopterin: An Inflammatory Prognostic Marker for Risk Prediction and Severity of Covid‐19

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

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