One-pot green synthesis of optical fluorescent sensor for selective detection of Ni2+ ions and hydro gel studies

Celestina, J. Jone; Tharmaraj, P.; Sheela, C.D.; Alphonse, L.; Shakina, J.

doi:10.1016/j.optmat.2020.110444

Cited by 14 publications

(4 citation statements)

References 55 publications

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“…Moreover, nickel was primarily found as Ni 2+ at pH 7. The NiOH + , Ni(OH) 2 , and Ni(OH)̅ 3 species were gradually dominated over Ni 2+ with a growing pH …”

Section: Resultsmentioning

confidence: 99%

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Ultratrace Detection of Nickel(II) Ions in Water Samples Using Dimethylglyoxime-Doped GQDs as the Induced Metal Complex Nanoparticles by a Resonance Light Scattering Sensor

et al. 2021

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This study aimed to synthesize dimethylglyoxime (DMG) (N-source)-doped graphene quantum dots (N-GQDs) via simultaneous pyrolysis of citric acid and 1.0% (w/v) DMG. The maximum excitation wavelength (λ max , ex = 380 nm) of the N-GQD solution (49% quantum yield (QY)) was a red shift with respect to that of bare GQDs (λ max , ex = 365 nm) (46% QY); at the same maximum emission wavelength (λ max , em = 460 nm), their resonance light scattering (RLS) intensity peak was observed at λ max , ex/em = 530/533 nm. FTIR, X-ray photoelectron spectroscopy, XRD, energy-dispersive X-ray spectroscopy, and transmission electron microscopy analyses were performed to examine the synthesized materials. The selective and sensitive detection of Ni 2+ using the RLS intensity was performed at 533 nm under the optimum conditions consisting of both 25 mg L –1 N-GQDs and 2.5 mg L –1 DMG in the ammonium buffer solution of pH 9.0. The linearity of Ni 2+ was 50.0–200.0 μg L –1 with a regression line, y = 5.031 x – 190.4 ( r 2 = 0.9948). The limit of detection (LOD) and the limit of quantitation (LOQ) were determined to be 20.0 and 60.0 μg L –1 , respectively. The method precision expressed as % RSDs was 4.90 for intraday ( n = 3 × 3) and 7.65 for interday ( n = 5 × 3). This developed method afforded good recoveries of Ni 2+ in a range of 85–108% when spiked with real water samples. Overall, this innovative method illustrated the identification and detection of Ni 2+ as a DMG complex with N-GQDs, and the detection was highly sensitive and selective.

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“…Moreover, nickel was primarily found as Ni 2+ at pH 7. The NiOH + , Ni(OH) 2 , and Ni(OH)̅ 3 species were gradually dominated over Ni 2+ with a growing pH …”

Section: Resultsmentioning

confidence: 99%

“…The NiOH + , Ni(OH) 2 , and Ni(OH)̅ 3 species were gradually dominated over Ni 2+ with a growing pH. 49 2.7. Effect of Incubation Time.…”

Section: Effect Of Concentration Of N-gqdsmentioning

confidence: 98%

Ultratrace Detection of Nickel(II) Ions in Water Samples Using Dimethylglyoxime-Doped GQDs as the Induced Metal Complex Nanoparticles by a Resonance Light Scattering Sensor

et al. 2021

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“…As compared to other biologically essential metals, Ni is found to be limited in eukaryotes. 95 Nickel usually exists in Ni(0) and Ni(II) states while Ni(I) and Ni(IV) are hardly observed. Only a few nickelbased metalloenzymes including urease, nickel-superoxide dismutase (Ni-SOD) and [Ni-Fe] hydrogenase have been explored, so far.…”

Section: Probes For Ni(ii) Ionsmentioning

confidence: 99%

Fluorescent and chromogenic organic probes to detect group 10 metal ions: design strategies and sensing applications

Goswami,

Naithani,

Mangalam

et al. 2023

Dalton Trans.

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“…The red shift of emission wavelength by 41 nm of HMPM in the presence of Pd 2+ addition may be attributed to one of the recognized sensing mechanisms, an ICT (internal charge transfer) [59][60][61] process and/or the inhibition of the ESIPT (excited state intramolecular proton transfer) 45,46 process due to the deprotonation of -OH protons during complexation with Pd 2+ . The enhancement of the fluorescence intensity at 548 nm may also be attributed as chelation enhancement fluorescence (CHEF) 62,63 in the HMPM-Pd 2+ complex. A feasible binding mode of HMPM with Pd 2+ is presented in the diagram below (Scheme 2).…”

Section: Mechanism Of Pd 2+ Sensingmentioning

confidence: 99%

A new chromone-based fluorescent probe for ratiometric detection of Pd²⁺

et al. 2022

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One-pot green synthesis of optical fluorescent sensor for selective detection of Ni2+ ions and hydro gel studies

Cited by 14 publications

References 55 publications

Ultratrace Detection of Nickel(II) Ions in Water Samples Using Dimethylglyoxime-Doped GQDs as the Induced Metal Complex Nanoparticles by a Resonance Light Scattering Sensor

Ultratrace Detection of Nickel(II) Ions in Water Samples Using Dimethylglyoxime-Doped GQDs as the Induced Metal Complex Nanoparticles by a Resonance Light Scattering Sensor

Fluorescent and chromogenic organic probes to detect group 10 metal ions: design strategies and sensing applications

A new chromone-based fluorescent probe for ratiometric detection of Pd²⁺

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One-pot green synthesis of optical fluorescent sensor for selective detection of Ni2+ ions and hydro gel studies

Cited by 14 publications

References 55 publications

Ultratrace Detection of Nickel(II) Ions in Water Samples Using Dimethylglyoxime-Doped GQDs as the Induced Metal Complex Nanoparticles by a Resonance Light Scattering Sensor

Ultratrace Detection of Nickel(II) Ions in Water Samples Using Dimethylglyoxime-Doped GQDs as the Induced Metal Complex Nanoparticles by a Resonance Light Scattering Sensor

Fluorescent and chromogenic organic probes to detect group 10 metal ions: design strategies and sensing applications

A new chromone-based fluorescent probe for ratiometric detection of Pd2+

Contact Info

Product

Resources

About

A new chromone-based fluorescent probe for ratiometric detection of Pd²⁺