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

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

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.

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.

Formation of CT complexes and electron transfer from excited molecules of anthracene derivatives to methylviologen in aqueous and micellar media

1987 ◽  
Vol 52 (7) ◽  
pp. 1658-1665
Author(s):  
Viktor Řehák ◽  
Jana Boledovičová
Keyword(s):  
Electron Transfer ◽  
Complex Formation ◽  
Fluorescence Quenching ◽  
Rate Constant ◽  
Formation Constants ◽  
Dynamic Quenching ◽  
Micellar Media ◽  
Complex Formation Constants ◽  
Anthracene Derivatives ◽  
Ct Complexes

Disodium 1,5- and 1,8-anthracenedisulphonate (ADS) and 9-acetylanthracene form coloured CT complexes with methylviologen (MV2+) in aqueous and micellar media. The complex formation constants and molar absorptivities were determined by the Benesi-Hildebrandt method. In the fluorescence quenching, its static component plays the major role. The dynamic quenching component is determined by the rate constant of electron transfer from the S1 state of ADS to MV2+.

Fluorescence Quenching of Aminodiphenylamines with Chloromethanes

2002 ◽  
Vol 67 (8) ◽  
pp. 1154-1164 ◽  
Author(s):  
Nachiappan Radha ◽  
Meenakshisundaram Swaminathan
Keyword(s):  
Charge Transfer ◽  
Fluorescence Quenching ◽  
Ground State ◽  
Rate Constants ◽  
Quenching Mechanism ◽  
Quenching Rate ◽  
Charge Transfer Interaction ◽  
Electronically Excited ◽  
A Charge

The fluorescence quenching of 2-aminodiphenylamine (2ADPA), 4-aminodiphenylamine (4ADPA) and 4,4'-diaminodiphenylamine (DADPA) with tetrachloromethane, chloroform and dichloromethane have been studied in hexane, dioxane, acetonitrile and methanol as solvents. The quenching rate constants for the process have also been obtained by measuring the lifetimes of the fluorophores. The quenching was found to be dynamic in all cases. For 2ADPA and 4ADPA, the quenching rate constants of CCl4 and CHCl3 depend on the viscosity, whereas in the case of CH2Cl2, kq depends on polarity. The quenching rate constants for DADPA with CCl4 are viscosity-dependent but the quenching with CHCl3 and CH2Cl2 depends on the polarity of the solvents. From the results, the quenching mechanism is explained by the formation of a non-emissive complex involving a charge-transfer interaction between the electronically excited fluorophores and ground-state chloromethanes.

Tetracoordinate Imidazole-Based Boron Complexes for the Selective Detection of Picric Acid

2016 ◽  
Vol 55 (21) ◽  
pp. 11153-11159 ◽  
Author(s):  
Kunchala Dhanunjayarao ◽  
Vanga Mukundam ◽  
Krishnan Venkatasubbaiah
Keyword(s):  
Picric Acid ◽  
Selective Detection ◽  
Boron Complexes
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