Interesting static quenching of fluorescent hydrogel caused by immobilization of Cd2+ ions within interstitial morphology

2021 ◽  
Vol 331 ◽  
pp. 129419
Author(s):  
Nira Parshi ◽  
Dipika Pan ◽  
Biswaji Jana ◽  
Jhuma Ganguly
Keyword(s):  
Static Quenching

scholarly journals A study of the binding between radicicol and four proteins by means of spectroscopy and molecular docking

2021 ◽  
pp. 174751982199306
Author(s):  
Ya Gan ◽  
Ning Bai ◽  
Xitong Li ◽  
Shuiting Gao ◽  
Ruiyong Wang
Keyword(s):  
Molecular Docking ◽  
Human Serum ◽  
Serum Protein ◽  
Binding Constant ◽  
Inhibitory Effect ◽  
Experimental Results ◽  
Static Quenching ◽  
Spectroscopic Techniques ◽  
Quenching Process ◽  
Human Serum Protein

The interactions between radicicol and four proteins (catalase, trypsin, pepsin, and human serum protein) are investigated by spectroscopic techniques and molecular docking. A static quenching process is confirmed. The binding constant value between radicicol and human serum protein is the largest among the four proteins. Results reveal changes in the micro-environment of the protein by the addition of radicicol. It is found that radicicol shows an inhibitory effect on the activity of proteins (catalase, trypsin, and pepsin). Molecular docking results are consistent with the thermodynamic experimental results. This work provides clues to the elucidation of the mechanisms of the interactions between radicicol and proteins.

A Fluorescence Quenching Analysis of the Binding of Fluoroquinolones to Humic Acid

2017 ◽  
Vol 71 (11) ◽  
pp. 2512-2518 ◽  
Author(s):  
Ryan P. Ferrie ◽  
Gregory E. Hewitt ◽  
Bruce D. Anderson
Keyword(s):  
Humic Acid ◽  
Fluorescence Quenching ◽  
Water Solubility ◽  
Binding Constants ◽  
High Water ◽  
Static Quenching ◽  
Temperature Range ◽  
Equilibrium Binding ◽  
Quenching Analysis ◽  
High Water Solubility

Fluorescence quenching was used to investigate the interaction of six fluoroquinolones with humic acid. Static quenching was observed for the binding of ciprofloxacin, enoxacin, fleroxacin, levofloxacin, norfloxacin, and ofloxacin to humic acid. The equilibrium binding constants were found from Stern–Volmer plots of the data. The quenching experiments were repeated over a temperature range of 25–45 ℃ and van’t Hoff plots were generated. From these linear plots, thermodynamic values were calculated for Δ H, Δ G, and Δ S for each of the fluoroquinolones. The equilibrium binding constants were found to be <1 for all the antibiotics studied. The calculated ΔH values were all negative and ranged from −9.5 to −27.6 kJ/mol. The high water solubility of the antibiotics and low ΔH of binding suggests that the antibiotics will be transported easily through the environment. Finally, whether the fluoroquinolones are in a protonated, deprotonated, or partially protonated state is found to correlate to the strength of binding to humic acid.

An ultra-sensitive “turn-off” fluorescent sensor for the trace detection of rifampicin based on glutathione-stabilized copper nanoclusters

The Analyst ◽  
2020 ◽  
Vol 145 (4) ◽  
pp. 1227-1235 ◽  
Author(s):  
Xiao-Man Wu ◽  
Jun-Hua Zhang ◽  
Zi-Shuo Feng ◽  
Wen-Xin Chen ◽  
Fei Zhang ◽  
...  
Keyword(s):  
Fluorescent Sensor ◽  
Inner Filter Effect ◽  
Static Quenching ◽  
Sensitive Detection ◽  
Trace Detection ◽  
Copper Nanoclusters ◽  
Filter Effect

A “turn-off” fluorescent sensor based on glutathione-stabilized copper nanoclusters (GSH-Cu NCs) was prepared for the sensitive detection of RFP via a static quenching strategy caused by the inner filter effect (IFE).

Microwave-assisted synthesis of nitrogen-rich carbon dots as effective fluorescent probes for sensitive detection of Ag+

2019 ◽  
Vol 3 (12) ◽  
pp. 2751-2758 ◽  
Author(s):  
Jie Feng ◽  
Xiaoran Zhao ◽  
Wei Bian ◽  
Xinjing Tang
Keyword(s):  
Fluorescent Probes ◽  
Carbon Dots ◽  
Static Quenching ◽  
Sensitive Detection ◽  
Microwave Assisted Synthesis ◽  
Quenching Effect ◽  
Microwave Assisted

Highly fluorescent N-dots are rationally designed and synthesized through microwave-assisted reaction of 2-azidoimidazole with glycerol crosslinker and are employed as an effective chemosensor for Ag+ analysis via the static quenching effect.

Coordination Polymer Nanoarchitecture for Nitroaromatic Sensing by Static Quenching Mechanism

2015 ◽  
Vol 119 (51) ◽  
pp. 28544-28550 ◽  
Author(s):  
Yue Li ◽  
Kun Liu ◽  
Wen-Juan Li ◽  
An Guo ◽  
Fang-Yao Zhao ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Static Quenching ◽  
Quenching Mechanism
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