Fluorescence quenching of boronic acid derivatives by aniline in alcohols – A Negative deviation from Stern–Volmer equation

Geethanjali, H.S.; Nagaraja, D.; Melavanki, Raveendra; Kusanur, Raviraj

doi:10.1016/j.jlumin.2015.06.040

Cited by 71 publications

(28 citation statements)

References 22 publications

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“…The fluorescence images presented in Figure A further confirm this result. Next, to investigate the sensitivity of PTCA‐C6 towards PA, Stern–Volmer plots versus PA concentration were fitted (Figure B,C) . It is interesting to note that both emission peaks at 495 and 520 nm can be used for PA detection.…”

Section: Resultsmentioning

confidence: 99%

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A Facilely Synthesized Dual‐State Emission Platform for Picric Acid Detection and Latent Fingerprint Visualization

et al. 2020

Chemistry A European J

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To achieve a highly efficient, dual‐state emission platform for picric acid (PA) detection and latent fingerprint (LFP) visualization, flexible alkyl chains have been facilely attached to the commercial organic dye 3,4,9,10‐perylenetetracarboxylic dianhydride to provide the target perylenetetracarboxylate molecules PTCA‐C4, PTCA‐C6, and PTCA‐C12. Interestingly, all these molecules exhibited impressive fluorescence characteristics with high photoluminescence quantum yields (PLQYs) of around 93.0 % in dilute solution. Also, emissive features were observed in the solid state because close molecular packing is prevented by the alkyl chains, especially for PTCA‐C6, which has a high PLQY value of 49.0 %. Benefiting from its impressive fluorescence performance in both solution and as aggregates, PTCA‐C6 was used as a dual‐state emission platform for PA detection and also LFP visualization. For example, double‐responsive fluorescence quenching in solution was observed in PA detection studies, resulting in high quenching constants (KSV) and also low limit‐of‐detection values. Furthermore, the fingerprint powder based on PTCA‐C6 also presented an impressive performance on various substrates in terms of fluorescence intensity and resolution, clearly providing the specific fine details of latent fingerprints. These results demonstrate that the facilely synthesized PTCA‐C6 with efficient dual‐state emission exhibits great potential in the real‐world applications of PA detection and LFP visualization.

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Section: Resultsmentioning

confidence: 99%

“…Next, to investigate the sensitivity of PTCA-C6t owards PA,S tern-Volmer plots versus PA concentration were fitted ( Figure 3B,C). [44,45] It is interesting to note that both emission peaks at 495 and 520 nm can be used for PA detection. For the fluorescence peak at 495 nm, ah igh quenching constant (K SV )o f3 .31 10 4 m À1 was determined.…”

Section: Resultsmentioning

confidence: 99%

A Facilely Synthesized Dual‐State Emission Platform for Picric Acid Detection and Latent Fingerprint Visualization

et al. 2020

Chemistry A European J

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“…But from Figure LH K SV is found to be increasing with the increase in viscosity of the solvent mixture. Hence it can be inferred from inverse dependency of diffusion‐limited rate constant k d on viscosity of the solvents that quenching is not merely controlled by material diffusion . The value of LH K SV increases with decrease in dielectric constant of the medium.…”

Section: Resultsmentioning

confidence: 99%

“…Fluorescence quenching plays a sensory role by molecular identification which serves numerous categories of beneficiary including biology as well as chemical investigations . In biochemistry, fluorescence quenching has been used for (a) analysing accessibility of fluorophores to quenchers, (b) exploration of availability and localization of probes in a membrane or protein, (c) detecting the presence of multiple emitting species and many more. Molecular biology researchers are striving to develop new methods for gene discovery and expression analysis based on fluorescence quenching studies .…”

Section: Introductionmentioning

confidence: 99%

Effect of viscosity and dielectric constant variation on fractional fluorescence quenching analysis of coumarin dye in binary solvent mixtures

Bhavya¹,

Melavanki

Kusanur³

et al. 2018

Luminescence

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Photo physical properties of fluorescent organic compounds give an immense improved knowledge on characteristics of excited state that is beneficial to devise innovate molecules and understand their performance in particular applications. Coumarin derivatives have been extensively investigated in this regard. This article narrates steady state fluorescence quenching measurements of a coumarin derivative namely 3-hydroxy-3-[2-oxo-2-(3-oxo-3H-benzo[f]chromen-2-yl)-ethyl]-1,3-dihydro-indol-2-one (3HBCD) in a binary mixture of acetonitrile and 1,4-dioxane. Aniline is used as quencher. Fluorescence intensity is large in acetonitrile and decreases as the percentage of 1,4-dioxane in the solvent mixture increases. With modest quencher concentration a deviation towards the x axis is noticed in the Stern-Volmer (S-V) plots. This downward curvature is interpreted as due to the presence of 3HBCD in different conformers in the lowest energy level. Ground state intramolecular hydrogen bonding formation is observed due to the conformational changes in the solute. Figured estimations of various quenching parameters recommend that, while dynamic quenching prompts linearity in S-V plot at lower quencher concentration, increasing quenching efficiency with increasing medium viscosity suggests that reaction is not entirely controlled by material diffusion. Stern-Volmer constant increases with decreasing medium dielectric constant.

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“…Quenching constants were calculated using linear Stern-Volmer equation as described (Geethanjali et al 2015). …”

Section: Fluorescence Spectroscopic Measurementsmentioning

confidence: 99%

Interaction of antimutagenic 1,4-dihydropyridine AV-153-Na with DNA and DNA-damaging molecules and its impact on DNA repair activity

Ļeonova

Rostoka

Sauvaigo³

et al. 2017

Preprint

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1,4-dihydropyridines (1,4-DHP) possess important biochemical and pharmacological properties, including antioxidant and antimutagenic activities. Interaction of some 1,4-DHP with DNA was recently reported. AV-153-Na, an antimutagenic and DNA-repair-enhancing compound appeared to be able to interact with DNA by intercalation.The aim of the current study was to characterize DNA's capacity for the binding of AV-153-Na, and using different approaches, to test intracellular distribution of the compound, to test the ability of the compound to scavenge peroxynitrite and hydroxyl radical and to assess the ability of the compound to modify the activity of DNA repair enzymes.The DNA binding activity of AV-153-Na was determined by means of fluorescence assay. Laser confocal scanning fluorescence microscopy demonstrated that within the cells AV-153-Na was found mostly in the cytoplasm; however, a stain in nucleolus was also detected. Binding to cytoplasmic structures might occur due to high affinity of the compound to protein, revealed by fluorescence spectroscopy titration and circular dichroism. Activation of DNA repair enzymes after binding to DNA appears to be the basis for the antimutagenic effects of AV-153-Na.

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Fluorescence quenching of boronic acid derivatives by aniline in alcohols – A Negative deviation from Stern–Volmer equation

Cited by 71 publications

References 22 publications

A Facilely Synthesized Dual‐State Emission Platform for Picric Acid Detection and Latent Fingerprint Visualization

A Facilely Synthesized Dual‐State Emission Platform for Picric Acid Detection and Latent Fingerprint Visualization

Effect of viscosity and dielectric constant variation on fractional fluorescence quenching analysis of coumarin dye in binary solvent mixtures

Interaction of antimutagenic 1,4-dihydropyridine AV-153-Na with DNA and DNA-damaging molecules and its impact on DNA repair activity

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