Complex-Formation-Enhanced Fluorescence Quenching Effect for Efficient Detection of Picric Acid

2014 ◽  
Vol 20 (38) ◽  
pp. 12215-12222 ◽  
Author(s):  
Aixiang Ding ◽  
Longmei Yang ◽  
Yuyang Zhang ◽  
Gaobin Zhang ◽  
Lin Kong ◽  
...  
Keyword(s):  
Complex Formation ◽  
Fluorescence Quenching ◽  
Picric Acid ◽  
Enhanced Fluorescence ◽  
Quenching Effect ◽  
Efficient Detection

scholarly journals Carbazole-Acenaphthene (Donor-Acceptor) based luminophores for picric acid detection: a combined experimental and theoretical study

2021 ◽  
Author(s):  
Aravind Kajjam ◽  
Kasturi Singh ◽  
Varun Tej R V ◽  
Sivakumar Vaidyanathan
Keyword(s):  
Complex Formation ◽  
Fluorescence Quenching ◽  
Theoretical Study ◽  
Picric Acid ◽  
Donor Acceptor

In the present investigation, carbazole-Acenaphthene based Donor-Acceptor luminophores were designed and synthesized. All the luminophores were showing fluorescence quenching behavior towards nitroaromatics through complex formation. All the luminophores were used...

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+.

scholarly journals Development and validation of a new spectrofluorimetric method for the determination of some beta-blockers through fluorescence quenching of eosin Y. Application to content uniformity test

2016 ◽  
Vol 14 (1) ◽  
pp. 258-266 ◽  
Author(s):  
Sayed M Derayea ◽  
Mahmoud A Omar ◽  
Mohamed Aboel-Kasem Abdel-Lateef ◽  
Ahmed I. Hassan
Keyword(s):  
Fluorescence Quenching ◽  
Beta Blockers ◽  
Dosage Forms ◽  
Ion Pair ◽  
Content Uniformity ◽  
Eosin Y ◽  
Pharmaceutical Dosage Forms ◽  
Quenching Effect ◽  
Spectrofluorimetric Method

AbstractA simple, rapid, sensitive and economic spectrofluorimetric method has been developed and validated for determination of some β-adrenergic blocking agents namely; betaxolol hydrochloride (BTX), carvedilol (CAR), labetalol hydrochloride (LBT), nebivolol hydrochloride (NEB) and propranolol hydrochloride (PRO). The method is based on the quenching effect of the cited drugs on the fluorescence intensity of eosin Y at pH 3.4 (acetate buffer). The fluorescence quenching is due to the formation of an ion-pair complex and was measured without extraction at 545 nm (λex. 301.5 nm). The factors affecting the formation of the ion-pair complex were carefully studied and optimized. Under the optimal conditions, the linear ranges for the relationship between the fluorescence quenching value and the concentration of the investigated drugs were 100-2500, 150-2500 and 50-2250 ng mL-1 for (BTX, CAR), (LBT, NEB) and (PRO) respectively. The method was validated according to ICH guidelines and was applied for determination of the cited drugs in pharmaceutical dosage forms with excellent recoveries. In addition, content uniformity testing of some commercial dosage forms was checked by the proposed method.

Enhanced fluorescence quenching rate of Coumarin 102 in stimulated emission depletion

2020 ◽  
Vol 220 ◽  
pp. 116982
Author(s):  
Wenxuan Zhao ◽  
Wei Zhao ◽  
Nityanand Sharma ◽  
Chen Zhang ◽  
Xiaoqiang Feng ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Stimulated Emission ◽  
Enhanced Fluorescence ◽  
Quenching Rate ◽  
Coumarin 102 ◽  
Stimulated Emission Depletion

Fluorescence quenching of triarylamine functionalized phenanthroline-based probe for detection of picric acid

2020 ◽  
Vol 401 ◽  
pp. 112780
Author(s):  
P.A. Parvathy ◽  
R. Dheepika ◽  
R. Abhijnakrishna ◽  
P.K.M. Imran ◽  
S. Nagarajan
Keyword(s):  
Fluorescence Quenching ◽  
Picric Acid

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

A simple enzyme-catalyzed reaction induced “switch” type fluorescence biosensor based on carbon nitride nanosheets for the assay of alkaline phosphatase activity

The Analyst ◽  
2020 ◽  
Vol 145 (19) ◽  
pp. 6277-6282
Author(s):  
Xi Zhu ◽  
Huifeng Xu ◽  
Yan Zhan ◽  
Wenjing Li ◽  
Yongqiang Dong ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Fluorescence Quenching ◽  
Phosphatase Activity ◽  
Alkaline Phosphatase Activity ◽  
Carbon Nitride ◽  
Quenching Effect ◽  
Fluorescence Switch ◽  
Switch Type ◽  
Fluorescence Biosensor ◽  
Carbon Nitride Nanosheets

An enzyme-catalyzed fluorescence “switch” type sensor was constructed for assay of alkaline phosphatase activity by combining the fluorescence quenching effect of Ag+ on ultrathin g-C3N4 nanosheets with the simple redox reaction of AA and Ag+.

ChemInform Abstract: Efficient Detection und Evaluation of Cyclodextrin Multiple Complex Formation

1986 ◽  
Vol 17 (30) ◽  
Author(s):  
D. W. ARMSTRONG ◽  
F. NOME ◽  
L. A. SPINO ◽  
T. D. GOLDEN
Keyword(s):  
Complex Formation ◽  
Efficient Detection

Photoactive rare earth complexes for fluorescence tuning and sensing cations (Fe3+) and anions (Cr2O72−)

RSC Advances ◽  
2015 ◽  
Vol 5 (9) ◽  
pp. 6752-6757 ◽  
Author(s):  
Xiang Shen ◽  
Bing Yan
Keyword(s):  
Rare Earth ◽  
Coordination Polymer ◽  
Fluorescence Quenching ◽  
Polymer Materials ◽  
Rare Earth Complexes ◽  
Quenching Effect ◽  
Rare Earth Coordination

A series of photoactive rare earth coordination polymer materials RE/Ad/BPDC (Ad = adeninate, BPDC = biphenyl-4,4′-dicarboxylate) with tunable multi-color luminescence are synthesized. Y0.99Eu0.01/Ad/BPDC has a selective fluorescence quenching effect for Fe3+ and Cr2O72−.

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