Cyan color-emitting nitrogen-functionalized carbon nanodots (NFCNDs) from <i>Indigofera tinctoria</i> and their catalytic reduction of organic dyes and fluorescent ink applications

Kumar, Jothi Vinoth; Ganesan, K.; Arulmozhi, R.; Arul, Velusamy; Abirami, N.

doi:10.1039/d1ra04351j

Cited by 24 publications

(9 citation statements)

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“…The adsorption peak of C. quadrangularis stem extract showed up at 266 nm, indicating the π–π* transition of polyphenols in the extract. 55 The peak appearing around 271 nm is related to the π–π* transition of aromatic conjugated C=C, and the shoulder peak at 310 nm is due to the C=O chromophore of different functional groups in the structure of the N-CDs. 56 The inset figure shows the blue luminescence of synthesized N-CDs when they are irradiated under UV–vis light at 365 nm.…”

Section: Resultsmentioning

confidence: 99%

“… where and are the quantum yields for N-CDs and quinine sulphate, while and stand for fluorescence emission intensities of the reference and sample, respectively, , is the measured absorbance, and denotes the refractive index of the solvent used. 55 …”

Section: Experimental Sectionmentioning

confidence: 99%

“…The selected standard reference is quinine sulfate with 54% of quantum yield because of its similar excitation and emission wavelengths to the synthesized N-CDs. Quinine sulfate with an excitation wavelength of 370 nm in 0.1 M H 2 SO 4 and N-CDs in DI were dissolved. where and are the quantum yields for N-CDs and quinine sulphate, while and stand for fluorescence emission intensities of the reference and sample, respectively, , is the measured absorbance, and denotes the refractive index of the solvent used …”

Section: Experimental Sectionmentioning

confidence: 99%

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Novel Metal-Free Fluorescent Sensor Based on Molecularly Imprinted Polymer N-CDs@MIP for Highly Selective Detection of TNP

et al. 2021

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In this article, we designed a fluorometric sensor based on nitrogen-passivated carbon dots infused with a molecularly imprinted polymer (N-CDs@MIP) via a reverse microemulsion technique using 3-aminopropyltriethoxysilane as a functional monomer, tetraethoxysilane as a cross-linker, and 2,4,6-trinitrophenol (TNP) as a template. The synthesized probe was used for selective and sensitive detection of trace amounts of TNP. The infusion of N-CDs (QY-21.6 percent) with a molecularly imprinted polymer can increase the fluorescent sensor sensitivity to detect TNP. Removal of template molecules leads to the formation of a molecularly imprinted layer, and N-CDs@MIP fluorescence response was quenched by TNP. The developed fluorescence probe shows a fine linear range from 0.5 to 2.5 nM with a detection limit of 0.15 nM. The synthesized fluorescent probe was used to analyze TNP in regular tap and lake water samples.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

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Novel Metal-Free Fluorescent Sensor Based on Molecularly Imprinted Polymer N-CDs@MIP for Highly Selective Detection of TNP

et al. 2021

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“…Nowadays, increasing awareness on green chemistry and other biological processes has led to the development of an ecofriendly approach for the synthesis of carbon dots from plants rich in carbon content. 23,24 Lourenco et al constructed manganese-doped cobaltite using the zeolitic-imidazolate framework 67 (ZIF-67) as a template, which gives an overpotential of 338 mV at 10 mA/cm 2 . 25 Yang et al reported Co and Fe-codoped CDs, a novel electrocatalyst, which showed a lower overpotential of 308 mV at 10 mA/cm 2 .…”

Section: ■ Introductionmentioning

confidence: 99%

“…Teak is also used for many folklore medicines and treating inflammatory swelling, and extract from various parts of the teak shows a healing capacity for biliousness, bronchitis, hyperacidity, diabetes, leprosy, astringent, and dysentery. Nowadays, increasing awareness on green chemistry and other biological processes has led to the development of an eco-friendly approach for the synthesis of carbon dots from plants rich in carbon content. , Lourenço et al constructed manganese-doped cobaltite using the zeolitic-imidazolate framework 67 (ZIF-67) as a template, which gives an overpotential of 338 mV at 10 mA/cm 2 . Yang et al reported Co and Fe-codoped CDs, a novel electrocatalyst, which showed a lower overpotential of 308 mV at 10 mA/cm 2 …”

Section: Introductionmentioning

confidence: 99%

A Facile Synthesis of a Fusiform-Shaped Three-Dimensional Co/Mn@CNDs-MOF Nanocomposite as an Efficient Electrocatalyst for Oxygen Evolution Reaction in Alkaline Medium

et al. 2022

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A facile synthesis of a bimetallic metal–organic framework (MOF) codoped with carbon nanodots (CNDs) (Co/Mn@CNDs-MOF) via solvothermal treatment is reported. In this study, we prepared a composite material with nanofusiform-like structures as an efficient earth-abundant oxygen evolution reaction (OER) electrocatalyst, its morphology was confirmed by high-resolution transmission electron microscopy, and the calculated average particle size of the Co/Mn@CNDs-MOF was 10.5 nm. Electrochemical methods were performed to examine the catalytic OER of the Co/Mn@CNDs-MOF electrode. The MOF composite revealed high current densities of 50 and 100 mA/cm2 at 280 and 320 mV overpotentials, respectively, with a low Tafel slope of 140 mV dec–1 in a 1 M KOH aqueous electrolyte toward OER. Here, the incorporation of CNDs into a bimetallic MOF increases the surface area, active sites, and moreover the electrocatalytic activity of the composite, revealing almost equal properties when compared to a commercial catalyst, ruthenium oxide (RuO2). This research provides an outstanding avenue to realize multifunctional electrocatalysts.

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Multifunctional Carbon Nanodot‐Based Advanced Diagnostics and Therapeutics

Kapat,

Semwal,

Chillarge

et al. 2023

Advanced Therapeutics

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Carbon nanodots (CNDs) are an emerging class of zero‐dimensional carbon nanomaterials that accumulated immense interest from researchers in the past two decades due to their facile synthesis and unique photo‐physical and ‐chemical properties. In particular, their long wavelength fluorescence emission, enhanced tissue penetration depth, excellent water dispersibility, tuneable surface chemistry, charge transfer properties, and biocompatibility have unveiled newer avenues for advanced application in therapeutics, diagnostics, theranostics, and tissue regeneration.The review typically emphasizes CNDs, excluding the other members of the carbon dots (CDs) family, which has not been covered before. After introducing CNDs in the carbon nanomaterial hierarchy, their synthesis, general properties, functionalization, and characterization are subsequently discussed. The following section elaborates on mechanisms of CNDs fluorescence, quenching, and associated factors based on the latest theories and models. The diagnostic, theranostic, and therapeutic applications of red/NIR‐emitting CNDs are thoroughly reviewed to cover the latest developments, including in vitro/in vivo bioimaging, thermoelectric and piezoelectric biosensing, and various soft and hard tissue regeneration. Overall, this work will enlighten passionate readers about the present status and futuristic aspects of CNDs in healthcare management, besides reported toxicities and challenges associated with their bench‐to‐bedside translation.This article is protected by copyright. All rights reserved

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Cyan color-emitting nitrogen-functionalized carbon nanodots (NFCNDs) from Indigofera tinctoria and their catalytic reduction of organic dyes and fluorescent ink applications

Abstract: The present study reports the synthesis of nitrogen-functionalized carbon nanodots (NFCNDs) by a low-cost hydrothermal method using the leaf extract of Indigofera tinctoria as a novel carbon precursor.

Cited by 24 publications

References 61 publications

Novel Metal-Free Fluorescent Sensor Based on Molecularly Imprinted Polymer N-CDs@MIP for Highly Selective Detection of TNP

Novel Metal-Free Fluorescent Sensor Based on Molecularly Imprinted Polymer N-CDs@MIP for Highly Selective Detection of TNP

A Facile Synthesis of a Fusiform-Shaped Three-Dimensional Co/Mn@CNDs-MOF Nanocomposite as an Efficient Electrocatalyst for Oxygen Evolution Reaction in Alkaline Medium

Multifunctional Carbon Nanodot‐Based Advanced Diagnostics and Therapeutics

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