A Cu(<scp>ii</scp>) mediated approach for colorimetric detection of aqueous fluoride in ppm level with a Schiff base receptor

Das, Rituraj; Bharati, Sudhanshu P; Borborah, Abhishek; Sarma, Plaban Jyoti; Das, Bhargab; Choudhury, Samarjit; Chakrabarty, Gaurango; Mahanta, Sanjeev P.

doi:10.1039/c8nj00331a

Cited by 16 publications

(4 citation statements)

References 63 publications

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“…To investigate the mechanism of the copper complexation and oxidation state of Cu, 1 H NMR, EPR, CV and computational studies were employed. 56 As shown in Fig. 4A , Cu 2+ in solution shows peaks at 0.098 mV, 0.066 mV and −0.110 mV vs. Ag/AgCl ( Fig.…”

Section: Resultsmentioning

confidence: 69%

A label-free fluorescent peptide probe for sensitive and selective determination of copper and sulfide ions in aqueous systems

Zhang

Cai

et al. 2021

RSC Adv.

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Section: Resultsmentioning

confidence: 69%

A label-free fluorescent peptide probe for sensitive and selective determination of copper and sulfide ions in aqueous systems

Zhang

Cai

et al. 2021

RSC Adv.

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“…[36][37][38] Besides, a majority of the colorimetric and fluorescent Schiff's base-based chemosensors for fluoride ions are capable of detecting fluoride in the solution state but are ineffective in the solid state owing to their weak or quenched emission in the solid state. [39][40][41] Thus, development of Schiff's bases that exhibit efficient solid-state emission would be ideal for applications in materials science and biology. Herein we report the synthesis, aggregation induced emission and mechanofluorochromic properties of the Schiff's base 1 (Figure 1A) which further showed high selectivity towards fluoride anion both in solution and in thin films with ppm-level detection limits in solution and in cellular conditions.…”

Section: Introductionmentioning

confidence: 99%

“…However, only a handful of Schiff's bases are known to detect anions due to the bulkier size of anions and the poor stability of imines over a wide range of pH [36–38] . Besides, a majority of the colorimetric and fluorescent Schiff's base‐based chemosensors for fluoride ions are capable of detecting fluoride in the solution state but are ineffective in the solid state owing to their weak or quenched emission in the solid state [39–41] . Thus, development of Schiff's bases that exhibit efficient solid‐state emission would be ideal for applications in materials science and biology.…”

Section: Introductionmentioning

confidence: 99%

Aggregation‐Induced Emission, Mechanofluorochromism, and Selective Fluoride Detection by a Tripodal Salicylaldimine

Marandi¹,

Tyagi²,

Neelakandan³

2022

ChemPlusChem

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Fluoride ions are indispensable in biology and environmental science and hence the selective and sensitive detection of fluoride is important. This work reports the design and synthesis of a tripodal Schiff's base 1 through a simple condensation reaction between a commercially available aldehyde and an amine. Single crystal X‐ray crystallography revealed that compound 1 is a planar entity with the three salicylidene derivatives on the three arms of the central phenyl moiety linked by imine groups. Compound 1 forms a molecular dimer that resembles a six‐petal flower and is stabilized through multiple intermolecular interactions such as C−H.π and π.π interactions. Compound 1 exhibited moderately good emission in the solid state with aggregation induced emission and reversible mechanofluorochromic properties. Moreover, 1 was observed to selectively detect fluoride among various anions with a limit of detection of ∼9 ppm. Compound 1 was also capable of detecting fluoride under a variety of conditions such as in thin films and under cellular conditions.

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“…So designing a fluoride responsive material is very much desired. In recent times, several groups have designed and synthesized various kinds of colorimetric, fluorescent, phosphorescent, chemiluminescent, gel‐based sensors for the quantitative detection of fluoride ion . In this present work, a new colorimetric fluoride sensor has been developed based on a fluorenone derivative.…”

Section: Introductionmentioning

confidence: 99%

2,4,7‐Triaminofluorenone as a Multi‐Analyte Colorimetric Sensor of Fluoride, Acetone Vapor, and Other Harmful Compounds

Mohar

2019

ChemistrySelect

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2,4,7‐Triaminofluorenone, a fluorenone derived multi‐analyte colorimetric chemosensor, has been synthesized via an extremely cost‐effective synthetic pathway. The sensor molecule can detect various analytes such as fluoride ion, acetone vapor, and picric acid. The violet solution of the sensor molecule becomes deep blue in the presence of fluoride ion. It can detect fluoride down to 120 ppb level. The compound in the solid state shows vapochromism only in the presence of acetone. The grey colored solid coating of the sensor molecule becomes blue in the presence of acetone vapor. This property was utilized to sense acetone vapor. Color Grab, an android based app, was utilized to detect acetone in real time down to 10 ppm level. Apart from that, the same sensor molecule was also tested for sensing different electron deficient nitro aromatic compounds due to its electron rich framework. The sensor was found to detect picric acid selectively. The sensor compound also shows acid‐base induced color change. The violet solution of the sensor molecule becomes brown in the presence of carboxylic as well as mineral acid. This reaction is reversible. Hence, the brown solution becomes violet again in the presence of aliphatic amines as well as ammonia. Utilizing this property, a method has been described to detect two widely used highly volatile chemicals HCl and NH3 in different industries.

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A Cu(ii) mediated approach for colorimetric detection of aqueous fluoride in ppm level with a Schiff base receptor

Abstract: Inspired by the importance of fluoride detection in aqueous environment, a new methodology is demonstrated by employing the synergistic reaction of fluoride and Cu(ii) salts with a designed Schiff base receptor.

Cited by 16 publications

References 63 publications

A label-free fluorescent peptide probe for sensitive and selective determination of copper and sulfide ions in aqueous systems

A label-free fluorescent peptide probe for sensitive and selective determination of copper and sulfide ions in aqueous systems

Aggregation‐Induced Emission, Mechanofluorochromism, and Selective Fluoride Detection by a Tripodal Salicylaldimine

2,4,7‐Triaminofluorenone as a Multi‐Analyte Colorimetric Sensor of Fluoride, Acetone Vapor, and Other Harmful Compounds

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