Green synthesis of fluorescent carbon quantum dots for the detection of mercury(<scp>ii</scp>) and glutathione

Bano, Daraksha; Kumar, Vijay; Singh, Vikas Kumar; Hasan, S. H.

doi:10.1039/c8nj00432c

Cited by 160 publications

(50 citation statements)

References 39 publications

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“…The detection limit of 60 nM was calculated with a rapid response time of 30 s obtained. Bano and co-workers reported carbon quantum dots as sensitive nanoprobes for Hg 2+ monitoring via an 'on-off' mode (Bano et al 2018). All detection operations were done at pH = 7 in the presence of co-existing metal ions.…”

Section: Mercuric (Ii) (Hg 2+ ) Nanoprobesmentioning

confidence: 99%

Fluorescent, colourimetric, and ratiometric probes based on diverse fluorophore motifs for mercuric(II) ion (Hg2+) sensing: highlights from 2011 to 2019

Aderinto

2020

Chem. Pap.

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Though it has not been shown to deliver any biological importance, mercuric(II) ion (Hg 2+) is a deleterious cation which poses grievous effects to the human body and/or the ecosystem, hence, the need for its sensitive and selective monitoring in both environmental and biological systems. Over the years, there has been a great deal of work in the use of fluorescent, colourimetric, and/or ratiometric probes for Hg 2+ recognition. Essentially, the purpose of this review article is to give an overview of the advances made in the constructions of such probes based on the works reported in the period from 2011 to 2019. Discussion in this review work has been tailored to the kinds of fluorophore scaffolds used for the constructions of the probes reported. Selected examples of probes under each fluorophore subcategory were discussed with mentions of the typically determined parameters in an analytical sensing operation, including modulation in fluorescence intensity, optimal pH, detection limit, and association constant. The environmental and biological application ends of the probes were also touched where necessary. Important generalisations and conclusions were given at the end of the review. This review article highlights 196 references. Keywords Mercuric(II) ion (Hg 2+) • Fluorescent probes • Colourimetric probes • Ratiometric probes • Hg 2+-selective probes • Sensing

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Section: Mercuric (Ii) (Hg 2+ ) Nanoprobesmentioning

confidence: 99%

Fluorescent, colourimetric, and ratiometric probes based on diverse fluorophore motifs for mercuric(II) ion (Hg2+) sensing: highlights from 2011 to 2019

Aderinto

2020

Chem. Pap.

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“…A greener synthesis of water-soluble fluorescent carbon quantum dots (~ 260-400 nm) was reported via a simple one-step hydrothermal treatment using Tamarindus indica leaves; these biocompatible carbon quantum dots can be potentially applied in sensing, bioimaging, disease diagnostics, and other analytical applications (Bano et al 2018). Another facile approach for producing fluorescent carbon quantum dots entails the hydrothermal treatment of pineapples (Ananas comosus) and calamansi (Citrofortunella microcarpa) wastes (de Yro et al 2019).…”

Section: Eco-friendly and Sustainable Synthesis Of Carbon Quantum Dotsmentioning

confidence: 99%

“…The produced carbon quantum dots showed an excitation-dependent behavior with a high quantum yield of about 46.6% and could be applied as a very sensitive nanoprobe for the turn-off sensing of Hg 2+ with a minimum limit of detection as low as 6 nM in the dynamic range from 0 to 0.1 μM. Furthermore, it can act as a turnon sensor for glutathione detection with valuable selectivity (Bano et al 2018).…”

Section: Sensorsmentioning

confidence: 99%

Green synthesis, biomedical and biotechnological applications of carbon and graphene quantum dots. A review

2020

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Carbon and graphene quantum dots are prepared using top-down and bottom-up methods. Sustainable synthesis of quantum dots has several advantages such as the use of low-cost and non-toxic raw materials, simple operations, expeditious reactions, renewable resources and straightforward post-processing steps. These nanomaterials are promising for clinical and biomedical sciences, especially in bioimaging, diagnosis, bioanalytical assays and biosensors. Here we review green methods for the fabrication of quantum dots, and biomedical and biotechnological applications.

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“…The obtained self-fluorescent C dots can be tracked inside cells and exploited for imaging in vitro . Water-soluble fluorescent carbon quantum dots (CQDs) (quantum yield 46.6%) were hydrothermally prepared (figure 14) also from Tamarindus indica leaves [138] and applied for Hg 2+ sensing in the range from 0 to 0.1 mM. These bio-compatible CQDs can be potentially applied in diagnostics of diseases, bio-imaging, sensing, etc.…”

Section: Non-metal Elemental Nanoparticlesmentioning

confidence: 99%

Greener synthesis of chemical compounds and materials

et al. 2019

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Modern trends in the greener synthesis and fabrication of inorganic, organic and coordination compounds, materials, nanomaterials, hybrids and nanocomposites are discussed. Green chemistry deals with synthesis procedures according to its classic 12 principles, contributing to the sustainability of chemical processes, energy savings, lesser toxicity of reagents and final products, lesser damage to the environment and human health, decreasing the risk of global overheating, and more rational use of natural resources and agricultural wastes. Greener techniques have been applied to synthesize both well-known chemical compounds by more sustainable routes and completely new materials. A range of nanosized materials and composites can be produced by greener routes, including nanoparticles of metals, non-metals, their oxides and salts, aerogels or quantum dots. At the same time, such classic materials as cement, ceramics, adsorbents, polymers, bioplastics and biocomposites can be improved or obtained by cleaner processes. Several non-contaminating physical methods, such as microwave heating, ultrasound-assisted and hydrothermal processes or ball milling, frequently in combination with the use of natural precursors, are of major importance in the greener synthesis, as well as solventless and biosynthesis techniques. Non-hazardous solvents including ionic liquids, use of plant extracts, fungi, yeasts, bacteria and viruses are also discussed in relation with materials fabrication. Availability, necessity and profitability of scaling up green processes are discussed.

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Green synthesis of fluorescent carbon quantum dots for the detection of mercury(ii) and glutathione

Abstract: On–off–on detection of Hg2+ and GSH using green-synthesized CQDs from T. indica leaves for the first time.

Cited by 160 publications

References 39 publications

Fluorescent, colourimetric, and ratiometric probes based on diverse fluorophore motifs for mercuric(II) ion (Hg2+) sensing: highlights from 2011 to 2019

Fluorescent, colourimetric, and ratiometric probes based on diverse fluorophore motifs for mercuric(II) ion (Hg2+) sensing: highlights from 2011 to 2019

Green synthesis, biomedical and biotechnological applications of carbon and graphene quantum dots. A review

Greener synthesis of chemical compounds and materials

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