The first tryptophan based turn-off chemosensor for Fe2+ ion detection

Nagarajan, Rajendran; Vanjare, Balasaheb D.; Lee, Ki Hwan

doi:10.1016/j.saa.2021.120103

Cited by 11 publications

(14 citation statements)

References 37 publications

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“…Some reported fluorophores having pyrimidine, oxadiazole, dansyl‐styryl quinoline, arene, spirocyclic, dicyanomethylene and 8‐hydroxyquinoline moiety in the detection of Fe 2+ ion in buffer medium are using fluorescence technique [12–18] . The LOD value of the reported fluorophores is lesser than the fluorophore with −CH=N− moiety [10] . Especially, −CH=N− containing bidentate fluorophores exhibit very good fluorescence response and high capability to interact with metal ions in the chemosensor study [19] …”

Section: Introductionmentioning

confidence: 99%

“…The insufficiency of Fe 2 + ions causes kidney failure, anaemia, liver damage and Huntington's disease. [7][8][9][10] Similarly, the overage of Fe 2 + ions promotes diabetes, osteoporosis, and hemochromatosis diseases. [11] Therefore, developing sensitive chemosensors for the selective detection of iron is crucial.…”

Section: Introductionmentioning

confidence: 99%

“…[12][13][14][15][16][17][18] The LOD value of the reported fluorophores is lesser than the fluorophore with À CH=NÀ moiety. [10] Especially, À CH=NÀ containing bidentate fluorophores exhibit very good fluorescence response and high capability to interact with metal ions in the chemosensor study. [19] In our work, we have reported an azine monomer and its three oligoesters with different degrees of substituents and their chemosensor application of detecting Fe 2 + ions.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe²⁺ ion detection

et al. 2023

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Azine‐based monomer and its three oligoesters were synthesized, characterized with IR, UV, GC‐MS, GPC, 1H NMR, 13C{1H} NMR, 31P NMR and applied to chemosensor applications. In the chemosensor study, fluorophores show selective and sensitive responses with Fe2+ ions in the DMF/H2O solution (1 : 1, pH: 7.4, fluorophore: 5 μM). The quenching of fluorescence intensity with the addition of Fe2+ ion gives the correlation coefficient (R2) value above 0.99286, exhibiting good binding stoichiometry nature of fluorophores with Fe2+ than the oligoesters. The high detecting capability of oligoesters is further ascertained by its higher LOD than the monomer (5.05×10−7). The binding constant values of fluorophores obtained from the Benesi‐Hildebrand plot show that the oligoesters have a higher binding ability (1.0012–1.0025 M−1) with Fe2+ ion than the monomer (1.0011 M−1). The conductivity nature of the oligoester gradually increased with the contact time of iodine. After 96hr of iodine doping, EMDAP exhibits higher conductivity (1.98×10−3 Scm−1) than the other oligoesters due to higher electron‐density nitrogen atoms in the structure. The EMDOP shows high dielectric constant value because of its π‐π interaction, loosely attached π electrons and high dipole moment values. All these experimental results are validated with the theoretical (DFT) approach by optimizing the structure of the fluorophore with B3LYP/6‐311++G(d,p) level basis set. The DFT approach also explains the mechanism of fluorescence quenching and the exact binding sites of fluorophores with Fe2+ ions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe²⁺ ion detection

et al. 2023

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“…[5][6][7] The key for the effective colorimetric depends on the emerging highly selective and sensitive chromogenic chemosensors developed in this study and other studies for the determination of heavy metal ions. [8][9][10][11][12][13][14][15] The common oxidation states of iron are divalent and trivalent. According to the WHO standards, the concentration of Fe(II) cations in drinking water shall not exceed 5.35 μM, while water, which will be used for agricultural irrigation, shall not exceed 89.5 μM iron cations.…”

Section: Introductionmentioning

confidence: 99%

“…[ 5–7 ] The key for the effective colorimetric depends on the emerging highly selective and sensitive chromogenic chemosensors developed in this study and other studies for the determination of heavy metal ions. [ 8–15 ]…”

Section: Introductionmentioning

confidence: 99%

Tannic acid as a chemosensor for colorimetric detection of Fe(II) and Au(III) ions in environmental water samples

Lin

Hsieh

Chang

et al. 2022

J Chinese Chemical Soc

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A simple and efficient method to detect and quantify Fe(II) and Au(III) cations in environmental water samples was developed. The detection principle is based on the 1:1 mol‐ratio complex formation between the probe molecule (tannic acid, TA) and Fe(II)/or Au(III), which yields visual color change and strong light absorbance at 518 nm and 534 nm, respectively. The association constant Ka for Fe(II) and Au(III) cations 4.01 × 104 and 4.13 × 104 M−1, respectively, was determined from Benesi–Hildebrand plot, indicating strong interactions between TA and target ions. This TA probe performed well in 50 mM phosphate buffer (PB, pH 9.0) solution and demonstrated an outstanding selectivity over 16 potential interfering metal ions and a good selectivity over Fe(III). The linear range in this study for Fe(II) and Au(III) cations was 0.25–100 μM and 1.0–100 μM, respectively. The detection limit of the TA probe for Fe(II) and Au(III) cations was found to be 0.080 and 0.50 μM, respectively. The spike recovery for both metal ions in three environmental aqueous samples (spring water and pond water) was ranged 90.2%–117.2%. This study demonstrated that the TA probe is a simple and convenient detection method for analyzing water samples obtained from fresh water sources.

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Coumarin‐Oxazolyl‐Based Chemosensor for Selective Detection of Fe²⁺ Ions: Preparation, Spectral Characterization, Theoretical Studies and Cellular Bioimaging

Kalaiarasi,

Ranjani,

Aswathy

et al. 2023

ChemistrySelect

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New coumarin‐oxazolyl derived receptor (E)‐3(2‐(2‐(1‐(2‐oxo‐2H‐chromen‐3‐yl)ethylidene)hydrazinyl)oxazol‐4‐yl)‐2H‐chromen‐2‐one (AOX) was designed, synthesised from the reaction of 3‐acetyl‐coumarin semicarbazone with 3‐bromoacetyl coumarin in chloroform/ethanol and the formation of AOX was confirmed by using different spectroscopic methods. The interaction of the AOX with different metal ions was investigated using photometric titrations and its selectively detected the Fe2+ ions.

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The first tryptophan based turn-off chemosensor for Fe2+ ion detection

Cited by 11 publications

References 37 publications

Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe²⁺ ion detection

Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe²⁺ ion detection

Tannic acid as a chemosensor for colorimetric detection of Fe(II) and Au(III) ions in environmental water samples

Coumarin‐Oxazolyl‐Based Chemosensor for Selective Detection of Fe²⁺ Ions: Preparation, Spectral Characterization, Theoretical Studies and Cellular Bioimaging

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The first tryptophan based turn-off chemosensor for Fe2+ ion detection

Cited by 11 publications

References 37 publications

Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe2+ ion detection

Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe2+ ion detection

Tannic acid as a chemosensor for colorimetric detection of Fe(II) and Au(III) ions in environmental water samples

Coumarin‐Oxazolyl‐Based Chemosensor for Selective Detection of Fe2+ Ions: Preparation, Spectral Characterization, Theoretical Studies and Cellular Bioimaging

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Product

Resources

About

Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe²⁺ ion detection

Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe²⁺ ion detection

Coumarin‐Oxazolyl‐Based Chemosensor for Selective Detection of Fe²⁺ Ions: Preparation, Spectral Characterization, Theoretical Studies and Cellular Bioimaging