Multianalyte azo dye as an on-site assay kit for colorimetric detection of Hg2+ions and electrochemical sensing of Zn2+ ions

Dhaka, Gargi; Jindal, Gitanjali; Kaur, Ranjeet; Rana, Shilpa; Gupta, Akhil; Kaur, Navneet

doi:10.1016/j.saa.2019.117869

Cited by 14 publications

(5 citation statements)

References 36 publications

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“…and Hg 2+ could enhance the π-delocalization, thereby reducing the energy of the π-π * transitions accounting for the new observable absorption band and visible colour change. 54 This visible red-shift in absorbance wavelength is proposed to be due to analyte interaction with the acceptor unit in the D-π-A conjugated system. Upon complexation, the electron withdrawing character of the acceptor unit increases, leading to a red-shift in the absorbance spectrum.…”

Section: Synthesis and Characterization Of Azo-compound Ad1mentioning

confidence: 99%

“…[48][49][50][51][52] Literature has reported that the introduction of the azofunctionality to an aromatic heterocyclic structure enhances the chromogenic capabilities of the resultant chemosensor. 53,54 Hence, in light of the importance of colorimetric azo-dyes towards analyte recognition, herein we report a novel coumarin-based sensor labelled AD1 bearing an azo-functionality for the sensitive, selective, and naked-eye colorimetric determination of Hg 2+ in CH 3 CN. Additionally, AD1 exhibited extended optical and environmental applications such as the construction of logic mimicking devices, molecular keypad locks, on-site assay kits, and real-world water analysis.…”

Section: Introductionmentioning

confidence: 99%

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A Coumarin-azo Derived Colorimetric Chemosensor for Hg2+ Detection in Organic and Aqueous Media and its Extended Real-world Applications

2022

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Pollution caused by the release of toxic heavy metals into the environment by industrial and farming processes has been regarded as a major problem worldwide. This has attracted a great deal of attention into restoration and remediation. Mercury is classi ed as a toxic heavy metal which has posed signi cant challenges to public and environmental health. To date, conventional methods for mercury detection rely on expensive, destructive, complex, and highly specialized methods. Evidently, there is a need to develop systems capable of easily identifying and quantifying mercury within the environment. In this way, organic-based colorimetric chemosensors are gaining increasing popularity due to their high sensitivity, selectivity, cost-effectiveness, ease of design, naked-eye, and on-site detection ability. The formation of coumarin-azo derivative AD1 was carried out by a conventional diazotization reaction with coumarinamine 1c and N,N-dimethylaniline. Sensor AD1 displayed remarkable visual colour change upon mercury addition with appreciable selectivity and sensitivity. The detection limit was calculated as 0.24 µM.Additionally, the reversible nature of AD1 allowed for the construction of an IMPLICATION type logic gate and Molecular Keypad Lock. Chemosensor AD1 displayed further sensing applications in real-world water samples and towards on-site assay methods. Herein, we describe a coumarin-derived chemosensor bearing an azo (N = N) functionality for the colorimetric and quantitative determination of Hg 2+ in organic and aqueous media.

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Section: Synthesis and Characterization Of Azo-compound Ad1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Coumarin-azo Derived Colorimetric Chemosensor for Hg2+ Detection in Organic and Aqueous Media and its Extended Real-world Applications

2022

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“…Job's plot confirmed 1:1 stoichiometry between 100 and Hg 2+ . The limit of detection was 8.5 µM, and the sensor was applied for the real water analysis [125]. The ninhydrin-thiosemicarbazone based sensor 101 (Figure 31) was developed for the colorimetric sensing of Hg 2+ in aqueous medium [126].…”

Section: Colorimetric Sensorsmentioning

confidence: 99%

Mercury Toxicity and Detection Using Chromo-Fluorogenic Chemosensors

2021

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Mercury (Hg), this non-essential heavy metal released from both industrial and natural sources entered into living bodies, and cause grievous detrimental effects to the human health and ecosystem. The monitoring of Hg2+ excessive accumulation can be beneficial to fight against the risk associated with mercury toxicity to living systems. Therefore, there is an emergent need of novel and facile analytical approaches for the monitoring of mercury levels in various environmental, industrial, and biological samples. The chromo-fluorogenic chemosensors possess the attractive analytical parameters of low-cost, enhanced detection ability with high sensitivity, simplicity, rapid on-site monitoring ability, etc. This review was narrated to summarize the mercuric ion selective chromo-fluorogenic chemosensors reported in the year 2020. The design of sensors, mechanisms, fluorophores used, analytical performance, etc. are summarized and discussed.

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“…[10] It is also wellestablished in the literature that azo-bonded compounds can increase their chromogenicity by integrating various types of heterocyclic derivatives into their designs. These mono-azo chromophoric derivatives are reactive towards anions (CN À , AcO À ), [11][12][13] cations (Cu + 2 , Fe + 2 and Hg + 2 ), [14][15][16] nitric oxide (NO), [17] picric acid (TNP). [18][19][20][21][22] Hence, these molecules can be used to detect and determine such species present in environmentally polluted samples that affect both the environment and human health.…”

Section: Introductionmentioning

confidence: 99%

Effect of Intramolecular Hydrogen Bonding Interaction of Azo‐Hydrazone Tautomers of 3‐Diethylamino Phenol Based Azo Bonded Molecules and their Biological Potentialities

Krishnamurthy,

Keshavayya,

Noor Zahara

et al. 2023

ChemistrySelect

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The synthesis of novel mono‐azo benzothiazole derivatives using 3‐Diethylaminophenol (3‐DEAP) as a common coupling component is an electrophilic substitution reaction that was influenced by the positive mesomeric effect (+M effect) under appropriate experimental conditions. Various spectroscopic and analytical methods, including UV‐vis, fluorescence, FT‐IR, (1H and 13C) NMR, and HRMS, were used to confirm the structural characteristics of the synthesized molecules. Further, the Gaussian 09, CAM‐B3LYP/LANL2MB functions are used to predict the quantum chemical characteristics and their molecular electrostatic potential region of all the designed mono‐azo derivatives. Based on the investigations of UV‐Vis, interactions between intramolecular hydrogen bonds were observed in a variety of solvents and polarities, with a maximum in the 508–534 nm range. The gram‐positive and two gram‐negative bacterial strains were utilized for antibacterial activity in order to examine the biological effectiveness of the colourants. The coupling component with benzothiazole derivative showed a 14 mm zone of inhibition against the Gram‐negative bacteria Salmonella typhi. When compared to the standard BHT and EDTA as the positive control, the data from the DPPH and FIC assay technique of the titled compounds showed that all colourants have promising anti‐oxidant capabilities.

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Multianalyte azo dye as an on-site assay kit for colorimetric detection of Hg2+ions and electrochemical sensing of Zn2+ ions

Cited by 14 publications

References 36 publications

A Coumarin-azo Derived Colorimetric Chemosensor for Hg2+ Detection in Organic and Aqueous Media and its Extended Real-world Applications

A Coumarin-azo Derived Colorimetric Chemosensor for Hg2+ Detection in Organic and Aqueous Media and its Extended Real-world Applications

Mercury Toxicity and Detection Using Chromo-Fluorogenic Chemosensors

Effect of Intramolecular Hydrogen Bonding Interaction of Azo‐Hydrazone Tautomers of 3‐Diethylamino Phenol Based Azo Bonded Molecules and their Biological Potentialities

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