Fluorescent N-doped carbon quantum dots: A selective detection of Fe3+ and understanding its mechanism

Ali, Mir Sahanur; Bhunia, Nayan; Ali, Mir Sahidul; Karmakar, Srinibas; Mukherjee, Prasun; Chattopadhyay, Dipankar

doi:10.1016/j.cplett.2023.140574

Cited by 14 publications

(4 citation statements)

References 27 publications

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“… 21 Chattopadhyay et al reported blue-light-emitting nitrogen-doped carbon quantum dots (N-CQDs) derived from citric acid by a one-step hydrothermal method as probes for Fe 3+ where they could achieve an effective limit of detection (LOD) value with a good limit of quantification (LOQ) of Fe 3+ as low as 0.07 and 0.22 μM, respectively. 22 Similarly, Li and their group developed nitrogen- and boron-doped core–shell carbon quantum dots, i.e., B 1 N 2 CQDs using boric acid, ethylenediamine, and citric acid as precursors by a two-step hydrothermal approach. These highly fluorescent particles exhibited a limit of detection of 80 nM for iron with the linear range from 2 to 160 mM.…”

Section: Introductionmentioning

confidence: 99%

Biomass-Derived Carbon Dots as Nanoprobes for Smartphone–Paper-Based Assay of Iron and Bioimaging Application

Korram,

Koyande,

Mehetre

et al. 2023

ACS Omega

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A facile one-step carbonization approach is reported herein for the sustainable hydrothermal synthesis of fluorescent blue nitrogen-doped carbon quantum dots (NCQDs) using banana petioles obtained as biomass waste. These NCQDs were used to design a "turnoff" fluorescent probe, which exhibited excellent sensing capability toward the selective detection of micronutrient, Fe 3+ ion, with a limit of detection (LOD) of 0.21 nM. The turnoff process involves the formation of a nonradiative charge transfer complex via a photoinduced electron transfer process. The sensor showed a linear range from 5 to 200 nM and was used for the estimation of Fe 3+ ions in real plant samples. Further, a paper-based assay was developed for the quantitative estimation of Fe 3+ with LOD values of 0.47 nM for solution-based assay and 0.94 nM for paper-based assay using a smartphone-based readout for potential on-field applications in precision agriculture. Bioimaging studies on banana leaf cells using NCQDs revealed the selective staining of stomata openings on leaf lamella. Therefore, this work provides a way for the valorization of biomass waste into functional nanomaterials without using any extra chemicals.

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Section: Introductionmentioning

confidence: 99%

Biomass-Derived Carbon Dots as Nanoprobes for Smartphone–Paper-Based Assay of Iron and Bioimaging Application

Korram,

Koyande,

Mehetre

et al. 2023

ACS Omega

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“…As shown in figure 2(a), two absorption peaks were observed at 238 nm and 340 nm (red curve). The absorption peak at 238 nm was associated with the πconjugated sp 2 carbon core, resulting from the π-π * transition of electrons, while the absorption peak at 340 nm was due to the n-π * electronic transitions take place in non-bonding orbital [46]. In addition, the photoluminescence spectra of CDs showed the strongest emission intensity of CDs at 440 nm (blue curve) under the excitation at 340 nm (black curve).…”

Section: Optical Properties Of Cdsmentioning

confidence: 98%

Portable ratiometric fluorescence detection of Cu²⁺ and thiram

Zhang,

Jia,

Tong

et al. 2024

Methods Appl. Fluoresc.

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Food contaminants pose a danger to human health, but rapid, sensitive and reliable food safety detection methods can offer a solution to this problem. In this study, an optical fiber ratiometric fluorescence sensing system based on carbon dots (CDs) and o-phenylenediamine (OPD) was constructed. The ratiometric fluorescence response of Cu2+ and thiram was carried out by the fluorescence resonance energy transfer (FRET) between CDs and 2,3−diaminophenazine (ox-OPD, oxidized state o-phenylenediamine). The oxidation of OPD by Cu2+ resulted in the formation of ox-OPD, which quenched the fluorescence of CDs and exhibited a new emission peak at 573 nm. The formation of a [dithiocarbamate-Cu2+] (DTC-Cu2+) complex by reacting thiram with Cu2+, inhibits the OPD oxidation reaction triggered by Cu2+, thus turning off the fluorescence signal of OPD-Cu2+. The as-established detection system presented excellent sensitivity and selectivity for the detection of Cu2+ and thiram in the ranges of 1 ∼ 100 μM and 5 ∼ 50 μM, respectively. The lowest detection limits were 0.392 μM for Cu2+ and 0.522 μM for thiram. Furthermore, actual sample analysis indicated that the sensor had the potential for Cu2+ and thiram assays in real sample analysis.

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“…Due to their half-field nature, they frequently take electrons from CNPs surface negative surface groups. Finally, Fe 3+ has a strong affinity for CNPs, which may result in fluorescence intensity quenching [10,92].…”

Section: Possible Quenching Mechanismmentioning

confidence: 99%

“…CNPs have similar luminescence qualities to SQDs with certain advantages like low toxicity, economical production costs, and strong photostability. CNPs exceptional properties make them excellent candidates for a variety of applications, including metal ion detection [7][8][9], fluorescent ink [10,11], optoelectronic applications [12], fluorescent probes [13], bioimaging, biosensing [14], photocatalysis [15], nematic liquid crystals [16], optical thermometry [17][18][19], drug delivery and, nanomedicine [20]. CNPs synthesis strategies are broadly classified as top-down and bottom-up approaches.…”

Section: Introductionmentioning

confidence: 99%

Castor seed-derived luminescent carbon nanoparticles for metal ion detection and temperature sensing applications

Kumar,

Kumar

et al. 2024

Phys. Scr.

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In the current study, castor seeds are used as a first-time natural precursor in the hydrothermal process of making carbon nanoparticles. The produced nanoparticles have a non-uniform size distribution with an average diameter of 13 nm and a roughly spherical shape. They comprise a variety of functional groups containing carbon, nitrogen, and oxygen. Their spectra have peaks at 524 nm and 441 nm for their emission and excitation, respectively. They exhibit temperature-sensitive Photoluminescence (Pl) behavior, high quantum yield value (24%), and excitation-dependent emission. In high salt environments, UV radiation, storage time, and fluorescent light they provide exceptional photostability. They have been used in applications for metal ion and thermal sensing. With a limit of detection (LOD) value of 18 µM, they are found to be both sensitive and selective to Fe3+ ions. Additionally, a nanothermosensor with good recovery and a broad temperature range (5-85°C) has also been demonstrated with a thermal sensitivity of 0.54% °C-1 based on their temperature-sensitive behavior.

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Fluorescent N-doped carbon quantum dots: A selective detection of Fe3+ and understanding its mechanism

Cited by 14 publications

References 27 publications

Biomass-Derived Carbon Dots as Nanoprobes for Smartphone–Paper-Based Assay of Iron and Bioimaging Application

Biomass-Derived Carbon Dots as Nanoprobes for Smartphone–Paper-Based Assay of Iron and Bioimaging Application

Portable ratiometric fluorescence detection of Cu²⁺ and thiram

Castor seed-derived luminescent carbon nanoparticles for metal ion detection and temperature sensing applications

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Fluorescent N-doped carbon quantum dots: A selective detection of Fe3+ and understanding its mechanism

Cited by 14 publications

References 27 publications

Biomass-Derived Carbon Dots as Nanoprobes for Smartphone–Paper-Based Assay of Iron and Bioimaging Application

Biomass-Derived Carbon Dots as Nanoprobes for Smartphone–Paper-Based Assay of Iron and Bioimaging Application

Portable ratiometric fluorescence detection of Cu2+ and thiram

Castor seed-derived luminescent carbon nanoparticles for metal ion detection and temperature sensing applications

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Product

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Portable ratiometric fluorescence detection of Cu²⁺ and thiram