Fluorescence Quenching of a Benzimidazolium-based Probe for Selective Detection of Picric Acid in Aqueous Medium

2016 ◽  
Vol 1 (8) ◽  
pp. 1756-1762 ◽  
Author(s):  
Sunita Joshi ◽  
Santosh Kumari ◽  
Eduardo Chamorro ◽  
Debi D. Pant ◽  
Rajeev Sakhuja
Keyword(s):  
Fluorescence Quenching ◽  
Aqueous Medium ◽  
Picric Acid ◽  
Selective Detection

Charge-Transfer-Induced Fluorescence Quenching of Anthracene Derivatives and Selective Detection of Picric Acid

2016 ◽  
Vol 22 (6) ◽  
pp. 2012-2019 ◽  
Author(s):  
Dines Chandra Santra ◽  
Manas Kumar Bera ◽  
Pradip Kumar Sukul ◽  
Sudip Malik
Keyword(s):  
Charge Transfer ◽  
Fluorescence Quenching ◽  
Picric Acid ◽  
Selective Detection ◽  
Anthracene Derivatives

Dy(III)-Based Metal–Organic Framework as a Fluorescent Probe for Highly Selective Detection of Picric Acid in Aqueous Medium

2019 ◽  
Vol 58 (23) ◽  
pp. 16065-16074 ◽  
Author(s):  
Richa Rajak ◽  
Mohit Saraf ◽  
Sanjay K. Verma ◽  
Ravinder Kumar ◽  
Shaikh M. Mobin
Keyword(s):  
Aqueous Medium ◽  
Fluorescent Probe ◽  
Picric Acid ◽  
Metal Organic Framework ◽  
Selective Detection ◽  
Metal Organic ◽  
Organic Framework

Synthesis of Fluorescent Nitrogen-Doped Carbon Quantum Dots for Selective Detection of Picric Acid in Water Samples

2018 ◽  
Vol 18 (12) ◽  
pp. 8111-8117 ◽  
Author(s):  
Min Tian ◽  
Yingte Wang ◽  
Yong Zhang
Keyword(s):  
Fluorescence Quenching ◽  
Fluorescence Probe ◽  
Picric Acid ◽  
Fluorescence Emission ◽  
Excitation Wavelength ◽  
Selective Detection ◽  
Blue Fluorescence ◽  
Nitrogen Doped ◽  
Relative Standard ◽  
Nitrogen Doped Carbon

In this work, fluorescent nitrogen-doped carbon dots (N-CDs) were pyrolysis synthesized using edetic acid and acrylamide as precursors without further surface modication. The as-prepared N-CDs were mono-dispersed spherical nanoparticles with an average diameter of 3.25 nm. The blue fluorescence emission was dependent of the excitation wavelengths, releasing stable and strong blue fluorescence under the maximum excitation wavelength. More strikingly, after adding picric acid (PA), the fluorescence of N-CDs aqueous solution gave rise to the obviously fluorescence quenching due to the inner filter effect. Under the optimum conditions, the fluorescence probe can be used for the selective detection of PA with a wide linear relationship in the range of 0.01–32 μM and the detection as low as 0.046 μM. Depending on the fluorescence quenching phenomenon, the resultant fluorescent probe for accurate and selective monitor of PA in Fenhe river samples was explored. The recoveries fell in the range of 97.13%–106.21% and the relative standard deviation was below 3% with satisfactory results.

Investigations on sensing of picric acid in aqueous medium via fluorescence quenching of quinine sulfate

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040040
Author(s):  
Prashant A. Kulkarni ◽  
Mahendra A. More ◽  
Vinod Nandre ◽  
Anupa Kumbhar
Keyword(s):  
Fluorescence Quenching ◽  
Aqueous Medium ◽  
Computational Analysis ◽  
Picric Acid ◽  
Quinine Sulfate ◽  
Dynamic Quenching ◽  
Quenching Mechanism ◽  
Temperature Dependent ◽  
Operational Temperature ◽  
Energy Of Interaction

This research describes systematic investigations on sensing of high explosives such as picric acid (PA), RDX, NTO, and trinitrotoluene (TNT) in aqueous medium via fluorescence quenching of quinine sulfate (QS). Although all the explosives exhibit fluorescence quenching of QS, highest response is observed for PA. Fluorescence quenching of [Formula: see text][Formula: see text]50% (in contrast to pristine QS) at [Formula: see text][Formula: see text]390 nm is observed for 10 nm (2.29 [Formula: see text]g of PA dissolved in 20 [Formula: see text]l of distilled water). The analysis of the Stern–Volmer (SV) plot implies dominance of static quenching mechanism in comparison to dynamic quenching mechanism. Furthermore, the effect of operational temperature on fluoresce quenching response for PA has been investigated, and values of enthalpy, entropy, and Gibbs free energy of interaction at various temperatures are estimated. The temperature-dependent studies reveal that fluorescence quenching is due to formation of strong hydrogen bonds, complemented by computational analysis.

Highly cross-linked fluorescent poly(cyclotriphosphazene-co-curcumin) microspheres for the selective detection of picric acid in solution phase

2015 ◽  
Vol 3 (8) ◽  
pp. 4604-4611 ◽  
Author(s):  
Wei Wei ◽  
Rongjie Lu ◽  
Shuyuan Tang ◽  
Xiaoya Liu
Keyword(s):  
Fluorescence Quenching ◽  
Picric Acid ◽  
Solution Phase ◽  
Selective Detection ◽  
Acid Base ◽  
Base Interaction ◽  
One Step ◽  
Acid Base Interaction

Poly(cyclotriphosphazene-co-curcumin) microspheres were facilely prepared by a one-step precipitation copolymerization and exhibited a highly selective fluorescence quenching response toward picric acid due to the unique acid–base interaction.

scholarly journals Selective Detection of nano-molar range Noxious Anions in Water by a Luminescent Metal-Organic Framework

2021 ◽  
Author(s):  
Sudip Kumar Mondal ◽  
Partha Mahata ◽  
Pooja Daga ◽  
Sourav Sarkar ◽  
Prakash Majee ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Metal Organic Framework ◽  
Selective Detection ◽  
Recognition Ability ◽  
Oxo Anions ◽  
Metal Organic ◽  
Organic Framework

A new metal-organic framework (MOF) showed excellent recognition ability towards five toxic oxo-anions viz. arsenate (HAsO42-), phosphate (PO43-), permanganate (MnO4-), chromate (CrO42-) and dichromate (Cr2O72-) in aqueous medium upon irradiation...

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