Simple colorimetric sensor for Cr(iii) and Cr(vi) speciation using silver nanoparticles as a probe

Elavarasi, M.; Rajeshwari, A.; Alex, Sruthi Ann; Kumar, Deepak; Chandrasekaran, N.; Mukherjee, Amitava

doi:10.1039/c4ay00877d

Cited by 85 publications

(28 citation statements)

References 22 publications

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“…However, it is not only harmful to the environment, but also poses great threat to living organism, especially for human health . Cr 2 O 7 2− has been proven to be carcinogenic and it will cause a variety of side effect or diseases such as allergic reactions, skin allergy and ulcers, renal failure, lung cancer and even gene mutation once long‐term exposure to Cr 2 O 7 2− . MnO 4 − is another strong oxidant that extensively used both in industry and laboratories .…”

Section: Introductionmentioning

confidence: 99%

Water‐Stable Coordination Polymers as Dual Fluorescent Sensors for Highly Oxidizing Anions Cr₂O₇²⁻ and MnO₄⁻

Zhang

Zhao

Chen

et al. 2019

Chemistry An Asian Journal

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Due to their striking opticalp roperties, luminescent coordination polymers as sensors for the detection of hazardous species have drawn interest of researchers in consideration of the control of environmental pollution. In this work, the organic ligand 2-(4-((E)-2-(pyridine-2-yl)vinyl)styryl)pyridine (2-bpeb),w hich possesses al arge p-conjugated system, was employedt or eact with d 10 metal ions to obtain novel luminescentc oordination polymers. Three complexes [Cd(2-bpeb) 0.5 (CNA)(H 2 O)] (CP1), [Cd(2-bpeb) 0.5 (NDC)] (CP2) and [Zn(2-bpeb)(BDC)] (CP3)w ere synthesized successfully by introducing carboxylic acids of 4-carboxycinnamic acid (H 2 CNA), 2,6-naphthalene dicarboxylica cid (H 2 NDC) and 1,4benzenedicarboxylica cid (H 2 BDC) as auxiliary ligands. Because of the existence of the large p-conjugated system and d 10 metal ions, all of these coordinationp olymers exhibit striking fluorescencep roperties.I mpressively,a ll of them can functiona ss ensors for the detection of highly oxidizing anionsM nO 4 À and Cr 2 O 7 2À ,w ith an increased sensitivity for MnO 4 À .Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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Section: Introductionmentioning

confidence: 99%

Water‐Stable Coordination Polymers as Dual Fluorescent Sensors for Highly Oxidizing Anions Cr₂O₇²⁻ and MnO₄⁻

Zhang

Zhao

Chen

et al. 2019

Chemistry An Asian Journal

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“…Therefore, the most frequently used method is the chemical reduction, reducing Cu (II) ions to Cu (I) ions, followed by the stabilisation step for the Cu 2 O nanoparticles in the solution. However, the common reducing reagents, such as polyols, [11] sodium citrate, [12] sodium borohydride [13] or other organic matters, may present biological hazards or environmental toxicity. As the global environment is facing with mounting challenges caused by human activity, it is desirable taking into account to use renewable, nontoxic materials and reagents.…”

Section: Introductionmentioning

confidence: 99%

Green and gentle synthesis of Cu₂O nanoparticles using lignin as reducing and capping reagent with antibacterial properties

2015

Journal of Experimental Nanoscience

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In this work, Cu 2 O nanoparticles of a particular shape were prepared by an ecofriendly, gentle and low-cost synthetic method using lignin as a reducing and capping reagent. Structure and morphology of the Cu 2 O nanoparticles were characterised by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction (XRD) and Fourier-transform (FT-IR) spectroscopy. The results established that Cu 2 O nanoparticles coated by lignin showed a particular shape. The morphology of Cu 2 O nanoparticles presented as some loose accumulation of particles just like broccoli, and the particle size range was between 100 and 200 nm. And, the XRD revealed the structure of crystalline of the Cu 2 O nanoparticles. In addition, the sterilisation of Cu 2 O nanoparticles on Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) was also investigated. The Cu 2 O nanoparticles showed effective bactericidal activity against E. coli and S. aureus. The antibacterial rate could get 100% after 30 min with 4.0 g/L Cu 2 O nanoparticles. Furthermore, the Cu 2 O nanoparticles were confirmed to have low cytotoxicity.

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“…The as-synthesized citrate-capped AgNPs were yellow in color in aqueous solution due to the strong surface plasmon resonance property of the particles, 35 and this was confirmed by UV-visible spectra that gave a maximum absorption intensity peak at 393 nm. The reaction was carried out first without the addition of Hg 2+ (0.0 nM).…”

Section: Detection Of Hg 2+ In Aqueous Solutionmentioning

confidence: 82%

Acetylcholinesterase inhibition-based colorimetric determination of Hg²⁺ using unmodified silver nanoparticles

et al. 2015

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A novel, enzyme-based, indirect detection method for mercury in aqueous solutions has been developed using unmodified silver nanoparticles. The enzyme acetylcholinesterase breaks down acetylthiocholine to thiocholine, which results in the crosslinking of the silver nanoparticles. The presence of mercury in solution prevents the aggregation of the silver nanoparticles by reversibly inhibiting the active site of the enzyme. The UV-visible absorption peak at 393 nm for the unmodified silver nanoparticles was found to decrease in the presence of acetylcholinesterase and acetylthiocholine. Upon adding mercury to the system, a concentration-dependent increase in the primary peak intensity at 393 nm was noted. The designed system was found to have good linearity (R 2 = 0.9799) in the range of 10 to 50 nM of mercury with an excellent limit of detection of 1.18 Â 10 À9 M in aqueous solution. This probe was successfully employed for the detection of mercury in spiked lakewater, groundwater, and seawater samples.

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Simple colorimetric sensor for Cr(iii) and Cr(vi) speciation using silver nanoparticles as a probe

Cited by 85 publications

References 22 publications

Water‐Stable Coordination Polymers as Dual Fluorescent Sensors for Highly Oxidizing Anions Cr₂O₇²⁻ and MnO₄⁻

Water‐Stable Coordination Polymers as Dual Fluorescent Sensors for Highly Oxidizing Anions Cr₂O₇²⁻ and MnO₄⁻

Green and gentle synthesis of Cu₂O nanoparticles using lignin as reducing and capping reagent with antibacterial properties

Acetylcholinesterase inhibition-based colorimetric determination of Hg²⁺ using unmodified silver nanoparticles

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Simple colorimetric sensor for Cr(iii) and Cr(vi) speciation using silver nanoparticles as a probe

Cited by 85 publications

References 22 publications

Water‐Stable Coordination Polymers as Dual Fluorescent Sensors for Highly Oxidizing Anions Cr2O72− and MnO4−

Water‐Stable Coordination Polymers as Dual Fluorescent Sensors for Highly Oxidizing Anions Cr2O72− and MnO4−

Green and gentle synthesis of Cu2O nanoparticles using lignin as reducing and capping reagent with antibacterial properties

Acetylcholinesterase inhibition-based colorimetric determination of Hg2+ using unmodified silver nanoparticles

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Water‐Stable Coordination Polymers as Dual Fluorescent Sensors for Highly Oxidizing Anions Cr₂O₇²⁻ and MnO₄⁻

Water‐Stable Coordination Polymers as Dual Fluorescent Sensors for Highly Oxidizing Anions Cr₂O₇²⁻ and MnO₄⁻

Green and gentle synthesis of Cu₂O nanoparticles using lignin as reducing and capping reagent with antibacterial properties

Acetylcholinesterase inhibition-based colorimetric determination of Hg²⁺ using unmodified silver nanoparticles