Turn-on fluorescence sensor for selective detection of fluoride ion and its molecular logic gates behavior

Two simple chemosensors with urea (L1) and thiourea (L2) groups were synthesized and studied by different spectroscopic techniques. Both receptors can sense acetate (Ac – ), dihydrogen phosphate (H 2 PO 4 – ), and fluoride (F – ) anions, accompanied by changes in UV–vis and 1 H NMR spectra, and an optical response is observed as a color change of the solutions due to deprotonation and hydrogen-bonding processes. Also, L1 and L2 were supported on TentaGel resins (R1 and R2), and their fluoride-sensing properties in DMSO and water solutions were studied. Interestingly, R2 can sense fluoride ions in sample solutions of 100% water.

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“…This can be translated as a color change of solution that can be perceived by the naked eye when anions are present. 12 − 14 …”

Section: Introductionmentioning

confidence: 99%

Optical Anion Receptors with Urea/Thiourea Subunits on a TentaGel Support

et al. 2021

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“…This indicated that the NDP is a highly selective fluoride anion sensor with no interference from other anions. Other highly sensitive and selective fluoride chemosensors based on diketopyrrolopyrrole ( Qu et al, 2012 ; Zhang et al, 2013 ), loutonin ( Mohanasundaram et al, 2020 ), carbon dots ( Liu et al, 2021 ), and so on have been manufactured.…”

Section: High Sensitivity and Selectivitymentioning

confidence: 99%

Hydrogen-Bonded Colorimetric and Fluorescence Chemosensor for Fluoride Anion With High Selectivity and Sensitivity: A Review

et al. 2021

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In recent years, the wide application of fluoride materials has grown rapidly, therefore excessive discharge in the surrounding environment, especially in drinking water and organic effluent, has become a potential hazard to humans, and has even resulted in fluorosis disease. The development of a highly effective and convenient method to recognize fluoride anions in surrounding environments seems necessary and urgent. Among which, the development of a colorimetric and fluorescence fluoride chemosensor with obvious color changing allowing for naked-eye detection with high sensitivity and selectivity is more interesting and challenging. In this minireview, current novel colorimetric and fluorescence chemosensors for fluoride anions by hydrogen-bond interaction are introduced, including obvious color changing by naked-eye detection, high sensitivity and selectivity, non-pollution and fluoride extraction ability, aqueous detection, and other additional functions. Finally, the perspective of the fluoride chemosensor design concept and potential evolution trends are pointed out.

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“…Here the ligand (3), intruding ion Fe 3 + and molecule EDTA was taken as the sequential logic functions of molecular keypad, which helped to generate the various combinational inputs to identify the best output order of the keypad lock. [39] These inputs of ligand (3), Fe 3 + ions and EDTA were assigned as 'C', 'F' and 'E' keys of keypad, respectively and ChemistrySelect CFE, CEF, FCE, FEC, ECF, EFC were taken as the possible combinations for the inputs. Out of all the electronic keys of keypad only one unique input of order CFE were able to open the keypad lock which also represents the only minimum fluorogenic output.…”

Section: Molecular Keypad Lockmentioning

confidence: 99%

“…To apply the shelf results in the practical field and potential utility of ligand (3)strip test kits were made according to reported method. [39] By submerging the Whatman filter papers into ACN/H 2 O (1 : 1, v/v) solution of ligand (3) (10 À 2 M) and then ventilate them to dry for 2 h in oven at 50-60 °C. Further, the paper strips adhering to the ligand (3) were used to reveal the presence of Fe 3 + ion, (10 À 3 M) for 30 seconds in spiked samples.…”

Section: Practical Applicationmentioning

confidence: 99%

A Schiff‐Base Molecular Keypad LockandTurn‐On Sensor for Selective Detection of Fe³⁺ with INHIBIT Logic Behaviour

et al. 2021

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A novel emissive Schiff-base (3)has been synthesized through single-step condensation of sulfanilamide and fluorogenic 3formylchromone. Compound (3) senses Fe 3 + ion in semiaqueous media. Both fluorogenic and colorimetrical changes were observed in the presence of Fe 3 + ions. Interestingly, on introduction of EDTA into the putative complex, [(3) + Fe 3 + ], the spectroscopic changes were reversed. The ligand detects Fe 3 + ions sensitively as the limit of detection for Fe 3 + ion was 9.3 × 10 À 7 M. The probe performs molecular logic operation (INHIBIT) as well as function of a three-input keypad lock. Further, the ligand (3)was successfully incorporated into Whatman filter paper as the test strips and aluminium coated silica gel plates, which showed a great selectivity for Fe 3 + ions.

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Turn-on fluorescence sensor for selective detection of fluoride ion and its molecular logic gates behavior

Cited by 45 publications

References 54 publications

Optical Anion Receptors with Urea/Thiourea Subunits on a TentaGel Support

Optical Anion Receptors with Urea/Thiourea Subunits on a TentaGel Support

Hydrogen-Bonded Colorimetric and Fluorescence Chemosensor for Fluoride Anion With High Selectivity and Sensitivity: A Review

A Schiff‐Base Molecular Keypad LockandTurn‐On Sensor for Selective Detection of Fe³⁺ with INHIBIT Logic Behaviour

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Turn-on fluorescence sensor for selective detection of fluoride ion and its molecular logic gates behavior

Cited by 45 publications

References 54 publications

Optical Anion Receptors with Urea/Thiourea Subunits on a TentaGel Support

Optical Anion Receptors with Urea/Thiourea Subunits on a TentaGel Support

Hydrogen-Bonded Colorimetric and Fluorescence Chemosensor for Fluoride Anion With High Selectivity and Sensitivity: A Review

A Schiff‐Base Molecular Keypad LockandTurn‐On Sensor for Selective Detection of Fe3+ with INHIBIT Logic Behaviour

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A Schiff‐Base Molecular Keypad LockandTurn‐On Sensor for Selective Detection of Fe³⁺ with INHIBIT Logic Behaviour