Do equilibrium and rate constants of intramicellar reactions depend on micelle size ?

2021 ◽  
Author(s):  
Tim Kohlmann ◽  
Martin Goez
Keyword(s):  
Rate Constants ◽  
Methyl Viologen ◽  
Alkyl Sulfate ◽  
Dynamic Quenching ◽  
Micelle Size ◽  
Static And Dynamic Quenching

We have studied the combined static and dynamic quenching of pyrene by methyl viologen in sodium alkyl sulfate micelles varying in volume by a factor of more than 4. Size...

Static and dynamic quenching of phenanthrene excited triplet state by Cu (II) ions

1990 ◽  
Vol 46 (5) ◽  
pp. 311-318 ◽  
Author(s):  
N.P. Gritsan ◽  
V.V. Korolev ◽  
D.G. Sushkov ◽  
I.V. Khmelinski ◽  
N.M. Bazhin
Keyword(s):  
Triplet State ◽  
Excited Triplet State ◽  
Dynamic Quenching ◽  
Excited Triplet ◽  
Static And Dynamic Quenching

Static and dynamic quenching of luminescent species in polymer media

1994 ◽  
Vol 4 (4) ◽  
pp. 327-330 ◽  
Author(s):  
Paul Hartmann ◽  
Marc J. P. Leiner ◽  
Max E. Lippitsch
Keyword(s):  
Dynamic Quenching ◽  
Static And Dynamic Quenching

scholarly journals Iron(III) hydroxocomplex - methyl viologen dication system as a prospective tool for determination of hydroxyl radical reaction rate constants with environmental pollutants

2021 ◽  
Author(s):  
Yuliya Tyutereva ◽  
Vyacheslav P. Grivin ◽  
Jing Xu ◽  
Feng Wu ◽  
Victor Plyusnin ◽  
...  
Keyword(s):  
Hydroxyl Radical ◽  
Hydroxyl Radicals ◽  
Rate Constants ◽  
Reaction Rate ◽  
Methyl Viologen ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Radical Reaction ◽  
Reaction Rate Constants ◽  
Wide Range

Abstract Reactivity of oxidative species with target pollutants is one of the crucial parameters for application of any system based on advanced oxidation processes (AOPs). This work presents new useful approach how to determine the hydroxyl radical reaction rate constants (kOH) using UVA laser flash photolysis technique. Fe(III) hydroxocomplex at pH 3 was applied as a standard source of hydroxyl radicals and methyl viologen dication (MV2+) was used as selective probe for •OH radical. Application of MV2+ allows to determine kOH values even for compounds which do not generate themselves optically detectable transient species in reaction with hydroxyl radicals. Validity of this approach was tested on a wide range of different persistent pesticides and its main advantages and drawbacks in comparison with existing steady-state and time-resolved techniques were discussed.

scholarly journals Fluorescence Quenching of DMB by Aniline in Benzene-Acetonitrile Mixture

2016 ◽  
Vol 65 ◽  
pp. 32-36 ◽  
Author(s):  
Ashok H. Sidarai ◽  
Vani R. Desai ◽  
Shirajahammad M. Hunagund ◽  
Mahantesha Basanagouda ◽  
Jagadish S. Kadadevarmath
Keyword(s):  
Fluorescence Quenching ◽  
Room Temperature ◽  
Solvent Mixture ◽  
Static Quenching ◽  
Solvent Mixtures ◽  
Dynamic Quenching ◽  
Approximation Model ◽  
Positive Deviation ◽  
Coumarin Dye ◽  
Static And Dynamic Quenching

The fluorescence quenching of coumarin dye namely 4-(2,6-dibromo-4-methyl-phenoxymethyl)-benzo[h]chromen-2-one [DMB] has been studied by aniline, in a different solvent mixture of benzene (BN) and acetonitrile (AN) at room temperature. The quenching is found to be appreciable and shows positive deviation from linearity in the Stern-Volmer (S-V) plots for all the solvent mixtures. The various rate parameters responsible for fluorescence quenching have been determined using a sphere of action static quenching model and finite sink approximation model. The magnitudes of these rate parameters indicate that positive deviation in the S-V plot is due to both static and dynamic quenching processes.

Static and Dynamic Quenching of Tryptophan Fluorescence in Various Proteins by a Chromium (III) Complex

2011 ◽  
Vol 44 (5) ◽  
pp. 369-374 ◽  
Author(s):  
Heather F. Crouse ◽  
Elyse M. Petrunak ◽  
Ashley M. Donovan ◽  
Anna C. Merkle ◽  
Brandi L. Swartz ◽  
...  
Keyword(s):  
Tryptophan Fluorescence ◽  
Dynamic Quenching ◽  
Static And Dynamic Quenching

Fluorescence Quenching of the Europium Tetracycline Hydrogen Peroxide Complex by Copper (II) and other Metal Ions

2005 ◽  
Vol 59 (10) ◽  
pp. 1209-1216 ◽  
Author(s):  
Clara Cano-Raya ◽  
María. D. Fernández Ramos ◽  
Luís. F. Capitán Vallvey ◽  
Otto S. Wolfbeis ◽  
Michael Schäferling
Keyword(s):  
Hydrogen Peroxide ◽  
Luminescence Intensity ◽  
Single Photon ◽  
Photon Counting ◽  
Dynamic Quenching ◽  
Copper Determination ◽  
Time Resolved ◽  
Europium Tetracycline ◽  
Static And Dynamic Quenching ◽  
The Eu

The europium–tetracycline complex [Eu(Tc)] is known to show only weak fluorescence with an emission maximum at 615 nm. On addition of hydrogen peroxide (HP), the strongly fluorescent [Eu(Tc)(HP)] complex is formed, which displays a 15-fold stronger luminescence intensity. This study describes the decrease in luminescence intensity of the [Eu(Tc)(HP)] complex in aqueous solution in the presence of Cu2+, Fe3+, Ag+, Al3+, Zn2+, Co2+, Ni2+, Mn2+, Ca2+, and Mg2+. Static and dynamic quenching can be induced by Cu2+, and these processes were quantified by means of their quenching constants. Stern–Volmer plots were also derived from lifetime imaging measurements accomplished by the rapid lifetime determination (RLD) technique based on microwell plate assays, and also by the time-correlated single photon counting (TCSPC) technique. According to those data, a time-resolved fluorescent method for copper determination can be proposed that is based on dynamic quenching of the [Eu(Tc)(HP)] complex by Cu2+ ions. The response to copper concentrations is linear up to 1.6 μmol L−1, providing a detection limit of 0.2 μmol L−1.

Static and Dynamic Quenching of Ru(II) Polypyridyl Excited States by Iodide

2006 ◽  
Vol 45 (1) ◽  
pp. 362-369 ◽  
Author(s):  
Andras Marton ◽  
Christopher C. Clark ◽  
Ramya Srinivasan ◽  
Robert E. Freundlich ◽  
Amy A. Narducci Sarjeant ◽  
...  
Keyword(s):  
Excited States ◽  
Dynamic Quenching ◽  
Static And Dynamic Quenching
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