Reaction of isopropyl(pentaaqua)chromium(III) ion with molecular oxygen in aqueous solution: kinetics of the chain reaction and effects of chain-breaking reagents and of variable ionic strength

1982 ◽  
Vol 104 (3) ◽  
pp. 704-712 ◽  
Author(s):  
Debra Ann Ryan ◽  
James H. Espenson
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Molecular Oxygen ◽  
Chain Reaction ◽  
Chain Breaking ◽  
Kinetics Of ◽  
Solution Kinetics

Meso tetrakis ortho-, meta-, and para-N-alkylpyridiniopor-phyrins: kinetics of copper(II) and zinc(II) incorporation and zinc porphyrin demetalation

2003 ◽  
Vol 07 (03) ◽  
pp. 139-146 ◽  
Author(s):  
Peter Hambright ◽  
Ines Batinić-Haberle ◽  
Ivan Spasojević
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Effective Charge ◽  
Methyl Ethyl ◽  
Ionic Strength Dependence ◽  
Zinc Porphyrin ◽  
Cationic Porphyrin ◽  
Strength Dependence ◽  
Acid Catalyzed ◽  
Kinetics Of

The relative reactivities of the tetrakis( N -alkylpyridinium- X - yl )-porphyrins where X = 4 (alkyl = methyl, ethyl, n -propyl) , X = 3 (methyl) , and X = 2 (methyl, ethyl, n -propyl, n -butyl, n -hexyl, n -octyl) were studied in aqueous solution. From the ionic strength dependence of the metalation rate constants, the effective charge of a particular cationic porphyrin was usually larger when copper(II) rather than zinc(II) was the reactant. The kinetics of ZnOH + incorporation and the acid catalyzed removal of zinc from the porphyrins in 1.0 M HCl were also studied. In general, the more basic 4- (para-) and 3- (meta-) isomers were the most reactive, followed by the less basic 2- (ortho-) methyl to n -butyl derivatives, with the lipophilic ortho n -hexyl and n -octyl porphyrins the least reactive.

The aggregation and reaction with oxygen of the tetrasodium salt of cobalt phthalocyanine-4,4',4'',4'''-tetrasulphonic acid

1973 ◽  
Vol 26 (2) ◽  
pp. 319 ◽  
Author(s):  
LC Gruen ◽  
RJ Blagrove
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Molecular Oxygen ◽  
Absorption Spectra ◽  
Alkaline Solution ◽  
Cobalt Phthalocyanine ◽  
Visible Absorption ◽  
Reversible Addition ◽  
Dimeric Form ◽  
Low Ionic Strength

The reversible addition of molecular oxygen to the tetrasodium salt of cobalt phthalocyanine-4,4?,4?,4??-tetrasulphonic acid in aqueous solution has been confirmed. Visible absorption spectra of the monomeric and dimeric species and of the oxygen adduct have been determined. A monomer-dimer system prevails at neutral pH, low ionic strength, and low dye concentrations. The oxygen adduct and the dimeric form of the dye predominate in alkaline solution.

Kinetics of the reactions between alkyl radicals and molecular oxygen in aqueous solution

1991 ◽  
Vol 95 (11) ◽  
pp. 4440-4441 ◽  
Author(s):  
Adam Marchaj ◽  
Douglas G. Kelley ◽  
Andreja Bakac ◽  
James H. Espenson
Keyword(s):  
Aqueous Solution ◽  
Molecular Oxygen ◽  
Alkyl Radicals ◽  
Kinetics Of

Effect of ionic strength on the kinetics of ionic and micellar reactions in aqueous solution

1982 ◽  
Vol 76 (2) ◽  
pp. 984-996 ◽  
Author(s):  
Mei Hsu Dung ◽  
John J. Kozak
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Kinetics Of

ChemInform Abstract: Stability of N-Chloro-3-aminopropanol in Aqueous Solution. Kinetics of Decomposition and Disproportion of N-Chloro-3-aminopropanol

ChemInform ◽  
1989 ◽  
Vol 20 (33) ◽  
Author(s):  
J. M. ANTELO ◽  
F. ARCE ◽  
J. FRANCO ◽  
P. R. BARRO ◽  
A. VARELA
Keyword(s):  
Aqueous Solution ◽  
Kinetics Of Decomposition ◽  
Kinetics Of ◽  
Solution Kinetics

scholarly journals Kinetics of Adsorptive Removal of Drimarene Brilliant Red from Aqueous Solution Using Untreated Agricultural Residues

2016 ◽  
Vol 59 (1) ◽  
pp. 11-22
Author(s):  
Ch. Tahir Mehmood ◽  
Muhammad Arshad ◽  
Tayyab Ashfaq ◽  
Muhammad Bilal ◽  
Muhammad Shafiq ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rice Husk ◽  
Analytical Data ◽  
Particle Sizes ◽  
Order Model ◽  
Orange Peels ◽  
Pseudo Second Order ◽  
Initial Adsorption ◽  
Kinetics Of ◽  
Solution Kinetics

The potential of untreated banana and orange peels, and rice husk was tested for drimarenebrilliant red (DBR) dye removal from aqueous solution. Kinetics was also studied in a batch experiment.Dose of adsorbents varied from 6 to 12 g/L, particle sizes 0.2 and 0.8 mm and contact time 2–32 h. Highdose and small particle size favoured DBR removal efficiency significantly. The highest adsorption capacitywas shown by rice husk (10 mg/g), then orange peels (9 mg/g) and the lowest by banana peels (4 mg/g).Langmuir isotherm (R2=0.99) and pseudo-second order model (R2=0.99) depicted well the equilibriumand best explained the kinetics for rice husk, respectively. Initial adsorption appeared as pore diffusionin all the cases and film diffusion was controlling the rate, later on. Based upon the analytical data, a simplemodel has been presented that fitted best to describe rice husk adsorption kinetics.

Synthesis, Acid-Base Properties, Kinetics and Mechanism of Cu2+ Incorporation into Water-Soluble Highly Substituted Porphyrins

2017 ◽  
Vol 21 (09) ◽  
pp. 611-621
Author(s):  
Hirofumi Konno ◽  
Jun Takeda
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Kinetics And Mechanism ◽  
Water Soluble ◽  
Acid Base ◽  
Base Equilibrium ◽  
Absorbance Change ◽  
Acid Base Equilibrium ◽  
Kinetics Of ◽  
Base Properties

The synthesis, acid-base properties, and kinetics of Cu[Formula: see text] incorporation into water-soluble highly substituted porphyrins were studied. The basicity increased and the stepwise acid-base equilibrium was clarified by increasing the number of phenyl groups at the [Formula: see text] position, and the basicity of a dodeca-substituted porphyrin increased with the ionic strength. The metalation reaction of the dodeca-substituted porphyrin with Cu[Formula: see text] in aqueous solution revealed a biphasic absorbance change at 453 nm. Plots of [Formula: see text] or[Formula: see text] vs. the Cu[Formula: see text] concentration and of log ([Formula: see text] or[Formula: see text]/[Formula: see text] 0) vs. the ionic strength show that [Formula: see text] is dependent on the Cu[Formula: see text] concentration and ionic strength, while [Formula: see text] is independent of these parameters. These results confirm the stepwise metalation mechanism and the existence of an intermediate in aqueous solution, which is indicated by the biphasic absorbance change at 453 nm.

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