Oh radical reaction of 5-substituted uracils: pulse radiolysis and product studies of a common redox-ambivalent radical produced by elimination of the 5-substituents
Article Abstract:
The redox properties of the intermediate radicals derived from OH radical reactions of 5-substituted uracils 1c-h (R = F, Cl, Br, NO2, NH2, OH) was determined by using a redox titration method in the pulse radiolysis of N2O-saturated phosphate buffer solution. The product study showed that the yield of isobarbituric acid and isodialuric acid increased due to the one-electron reduction of 5-oxyl radical 5 by N,N,N',N'-tetramethyl-p-phenylenediamine and the one electron oxidation of 5-oxo radical by tetranitromethane respectively.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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Comment on "The mechanism of hydrophobic solvation depends on solute radius" J. Phys. Chem. B 2000, 104, 1326
Article Abstract:
Comments on the paper presented by Southall and Dill (S&D) called 'The Mechanism of Hydrophobic Solvation Depends on Solute Radius', based on the Mercedes-Benz model of water is presented, where it is stressed that the Mercedes-Benz model is limited by construction as it is a two-dimensional model and cannot be used to compare molecules, which are three dimensional objects. Correct weightage was not given to the van der Waals energetic interactions between water and nonpolar solutes also.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
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Product and pulse radiolysis studies on radical-ion splitting of N(1)-C(5')-linked dimer hydrates of 5-substituted uracils by one-electron reduction in anoxic aqueous solution
Article Abstract:
Steady state [gamma]-radiolysis, pulse radiolysis and cyclic voltammetry was performed to identify the mechanism by which N(1)-C(5') linked hydrates of 5-substituted uracils undergo radiolytic reductive splitting to regenerate the parent monomers in anoxic aqueous solution. The homodimer hydrate 2b bearing the F-substituent at C(5') undergoes one-electron reduction to eliminate exclusively fluoride ion along the formation of dimer hydrate C(5') radical 2b(-F*) with oxidizing properties.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
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