A pyrene-benzimidazole composed effective fluoride sensor: potential mimicking of a Boolean logic gate

Kushwaha, Archana; Patil, Sagar K.; Das, Dipanwita

doi:10.1039/c8nj01011k

Cited by 23 publications

(6 citation statements)

References 105 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TFA) in order to restore the original properties of the free chemosensors. [134,135] In this context, Banarjee and co-workers have reported a combination of NAND, NOT and NOR logic function for the simple urea-based chemosensor 79 (Fig. 64a) [136].…”

Section: Molecular Logic Gatesmentioning

confidence: 99%

Advances in fluorescent and colorimetric sensors for anionic species

McNaughton

Farès

Picci

et al. 2021

Coordination Chemistry Reviews

110

View full text Add to dashboard Cite

In this review we cover recent developments in fluorescent and colorimetric anion sensors. These systems employ a range of different non-covalent interactions including hydrogen-and halogen-bonding, Lewis acidic boron-based sensors, metal-based sensors, charged systems, compounds that use anion-pi interactions to stabilise complexes, photoswitchable systems, the use of excimers and molecular logic gates in sensing. Recent developments in anion-selective chemodosimeters are also surveyed.

show abstract

Section: Molecular Logic Gatesmentioning

confidence: 99%

Advances in fluorescent and colorimetric sensors for anionic species

McNaughton

Farès

Picci

et al. 2021

Coordination Chemistry Reviews

110

View full text Add to dashboard Cite

show abstract

“…Additionally, the values of the limit of detection (LOD), calculated from absorbance, as well as fluorescence studies, are 0.06 and 0.05 ppm, respectively. The obtained LOD values are well below the recommended limit (1.5 ppm) proposed by WHO, as well as comparably low with respect to the recently reported spectroscopy based sensors. ,, The lower detection limit, faster response time and wider dynamic range of the sensor further make it a promising candidate in the field of fluoride sensing. − However, if the water contains a higher amount of fluoride (>6 ppm), dilution of the sample is recommended.…”

Section: Resultsmentioning

confidence: 52%

Highly Sensitive Optical Sensor for Selective Detection of Fluoride Level in Drinking Water: Methodology to Fabrication of Prototype Device

Chatterjee

Pan

Maji

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Excess consumption of fluoride through drinking water and its detrimental effects on human health have been a serious global concern. Therefore, frequent monitoring as well as quantitative determination of fluoride ion (F -) concentration in aqueous media is of vital importance. Herein, we have developed a facile and highly sensitive spectroscopic technique for selective detection of Fin aqueous media using aluminium phthalocyanine chloride (AlPc-Cl) as a sensor. The absorbance as well as steady-state fluorescence intensity of AlPc-Cl has been found to decrease in presence of Fwhich has been used as a marker for the determination of fluoride ion concentration in water. The structural change in AlPc-Cl after addition of Fhas been thoroughly studied by using 19 F NMR (Nuclear Magnetic Resonance) spectroscopy. Our detailed steady-state as well as time-resolved fluorescence studies reveal that the quenching mechanism is static in nature due to ground state complexation in between Fand AlPc-Cl molecules. The response of the sensor is found to be linear over the Fconcentration regime from 0 to 6 parts per million (ppm) with a detection limit of 0.05 ppm. Additionally, it shows an excellent selectivity as well as an insignificant change in sensitivity even in the presence of interfering iron and aluminium ions. Based on the detailed photophysical study, we have further developed a low cost and portable prototype device which shows an excellent sensitivity with the detection limit of 0.10 ppm. This prototype device has a high prospect for real-time monitoring of fluoride ion concentration especially in remote areas.

show abstract

“…For this, the 3s/k equation was utilized, where s and k are the standard deviation of the blank and the slope of the line of fit in fluorescence titration experiment, respectively. 27 In addition, the binding constants were calculated using the Benesi-Hildebrand equation:…”

Section: Anion Sensingmentioning

confidence: 99%