A reversible fluorescence “off–on–off” sensor for sequential detection of aluminum and acetate/fluoride ions

Gupta, Vinod K.; Mergu, Naveen; Kumawat, Lokesh Kumar; Singh, Ashok Kumar

doi:10.1016/j.talanta.2015.05.053

Cited by 349 publications

(85 citation statements)

References 65 publications

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“…However, in presence of Zn 2+ ion, the m/z peak was found to be at 425.10 which correspond to [H 10 L+Zn 2+ +Acetate] + (calculated: 425.02). So, these mass spectra also confirmed the binding nature of H 10 L to Zn 2+ as 1:1 stoichiometry [70][71][72]. …”

Section: H Nmr Titration and Mass Analysissupporting

confidence: 67%

A new coumarin based dual functional chemosensor for colorimetric detection of Fe3+ and fluorescence turn-on response of Zn2+

Nayan

Dutta

Mondal

et al. 2016

Sensors and Actuators B: Chemical

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Section: H Nmr Titration and Mass Analysissupporting

confidence: 67%

A new coumarin based dual functional chemosensor for colorimetric detection of Fe3+ and fluorescence turn-on response of Zn2+

Nayan

Dutta

Mondal

et al. 2016

Sensors and Actuators B: Chemical

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“…This is a vital point in polluting the environment in different ways . There are various polluting agents known to humans, and heavy metals are among the serious ones . Heavy metals, such as cobalt(II) (Co(II)), can be released into water and soil resources and then introduced to the food chain .…”

Section: Introductionmentioning

confidence: 99%

Developing a highly selective method for preconcentration and determination of cobalt in water and nut samples using 1‐(2‐pyridylazo)‐2‐naphthol and UV–visible spectroscopy

et al. 2020

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BACKGROUND Heavy metal contamination in water and agricultural products is a major concern that causes risks for human health. This article describes a highly selective approach to preconcentrate cobalt(II) (Co(II)) ions based on the standard UV–visible measurement of Co(II)–1‐(2‐pyridylazo)‐2‐naphthol complex at λ = 628 nm in water and nut samples. In this method, magnetic silica (mSiO2) was utilized as a practical sorbent and 1‐(2‐pyridylazo)‐2‐naphthol was employed as a complexing agent in the elution step. The adsorbent was characterized via X‐ray diffraction spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy. The effects of the main variables (pH, adsorption time, sorbent amount, pH of eluent, ligand volume, and desorption time) were investigated and established. RESULTS The maximum recovery was achieved at pH 7 ± 0.3, adsorption time of 60 min, sorbent amount of 40 mg, eluent pH 8 ± 0.2, ligand volume of 2 mL (16.95 × 10−4 mol L−1) and desorption time of 30 min. The linearity of dynamic range (10–500 μg L−1), limit of detection (0.32 μg L−1), relative standard deviation (3.04%), and preconcentration factor (25) show the reliability of the method. The sorbent was reusable 12 times. Selectivity and the effect of interference ions were successfully examined. The adsorption process of Co(II) ions on mSiO2 was investigated based on Langmuir and Freundlich isotherms. The Freundlich model was fitted with the system and the maximum capacity adsorption of mSiO2 for Co(II) adsorption is 2.35 mg g−1. Then, the kinetics study revealed that the adsorption process of Co(II) ions on the mSiO2 follows the pseudo‐first‐order model. The thermodynamics parameters ΔG, ΔS, and ΔH were calculated. CONCLUSION The method was fruitfully applied to preconcentrate Co(II) ions in water and nut samples. This method offers high selectivity and precision for determining Co(II) ions. © 2020 Society of Chemical Industry

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“…Fluorescence chemosensors provide many advantages including operational ease, high selectivity, low cost, and real-time monitoring. [42][43][44][45][46] Rhodamine derivatives exist in equilibrium between two different forms. [10][11][12][13][14][15][16][17] When these chemosensors encounter a metal ion in solution (organic or aqueous solution), a change in their optical characteristic is observed, such as a change in wavelength, a change in emission intensity, or the appearance of a novel fluorescence band.…”

Section: Introductionmentioning

confidence: 99%

Rhodamine‐based Colorimetric and Fluorescent Chemosensors for the Detection of Cu²⁺ Ions and its Application to Bioimaging

Park

Mergu

et al. 2018

Bulletin Korean Chem Soc

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The rhodamine based receptors were developed as colorimetric and fluorescent chemosensor towards Cu 2+ . By using UV-Vis and fluorescence spectroscopy techniques, their selectivity and photophysical properties towards various metal ions were determined. The obvious color change from colorless to pink (under normal light) and non-fluorescent to yellowish-green fluorescent (under UV light) were observed upon the copper addition. The metal binding structures were proposed based on analysis data of proton NMR and Job's plot. Cell imaging experiments were conducted to determine if the chemosensors could be used in biological systems. The results showed that cell viability did not decrease below 80% at any concentrations. Chemosensors and Cu 2+ were added to the cells for cell imaging and fluorescence images. Overall, it was found that the chemosensors were cell-permeable, non-toxic, and functional in the cells.

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A reversible fluorescence “off–on–off” sensor for sequential detection of aluminum and acetate/fluoride ions

Cited by 349 publications

References 65 publications

A new coumarin based dual functional chemosensor for colorimetric detection of Fe3+ and fluorescence turn-on response of Zn2+

A new coumarin based dual functional chemosensor for colorimetric detection of Fe3+ and fluorescence turn-on response of Zn2+

Developing a highly selective method for preconcentration and determination of cobalt in water and nut samples using 1‐(2‐pyridylazo)‐2‐naphthol and UV–visible spectroscopy

Rhodamine‐based Colorimetric and Fluorescent Chemosensors for the Detection of Cu²⁺ Ions and its Application to Bioimaging

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A reversible fluorescence “off–on–off” sensor for sequential detection of aluminum and acetate/fluoride ions

Cited by 349 publications

References 65 publications

A new coumarin based dual functional chemosensor for colorimetric detection of Fe3+ and fluorescence turn-on response of Zn2+

A new coumarin based dual functional chemosensor for colorimetric detection of Fe3+ and fluorescence turn-on response of Zn2+

Developing a highly selective method for preconcentration and determination of cobalt in water and nut samples using 1‐(2‐pyridylazo)‐2‐naphthol and UV–visible spectroscopy

Rhodamine‐based Colorimetric and Fluorescent Chemosensors for the Detection of Cu2+ Ions and its Application to Bioimaging

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Rhodamine‐based Colorimetric and Fluorescent Chemosensors for the Detection of Cu²⁺ Ions and its Application to Bioimaging