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Search Publications by: Pedatsur Neta (Fed)

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Displaying 26 - 50 of 76

Rate Constants for Reactions of Phenoxyl Radicals in Solution

March 1, 2005
Author(s)
Pedatsur Neta, J Grodkowski
Absolute rate constants for reactions of phenoxyl radicals in solution have been compiled and evaluated from the literature. Rate constants are included for phenoxyl radicals bearing various substituents, including semiquinone radicals and radical ions, as

Radiolytic Reactions of Monochloramine in Aqueous Solutions

September 1, 2003
Author(s)
G A. Poskrebyshev, Robert E. Huie, Pedatsur Neta
Monochloramine reacts with hydrated electrons very rapidly, k(NH 2CI + e aq-) = (2.2 0.2) x 10 10 L mol -1, to produce oNH 2 radicals. It reacts with oOH radicals more slowly, k(NH 2Cl + oOH) = (5.2 0.6) x 10 8 L mol -1 s -1, to produce oNHCl radicals

Spectrum and Reactivity of the Solvated Electron in the Ionic Liquid

January 1, 2003
Author(s)
James F. Wishart, Pedatsur Neta
st pulse radiolysis transient absorption experiments were conducted on the ionic liquid methyltributylammonium bis(tribluoromethylsulfonyl)imide (R 4NNTf 2). The solvated electron was observed to have a very broad absorption band peaking at 1400 nm (ε = 2

Radiolytic Dechlorination of Polychlorinated Biphenyls in Transformer Oil and in Marine Sediment

November 1, 2002
Author(s)
M Chaychian, C A. Jones, Dianne L. Poster, Joseph Silverman, Pedatsur Neta, Robert E. Huie, M I. Al-Sheikhly
Radiolytic dechlorination of PCBs in transformer oil and in marine sediments has been studied. At low PCB concentrations, complete degradation of the PCBs in transformer oil was achieved without degradation of the oil. Addition of an organic base

Temperature Dependence of the Acid Dissociation Constant of the Hydroxyl Radical

November 1, 2002
Author(s)
G A. Poskrebyshev, Pedatsur Neta, Robert E. Huie
The acid dissociation constant of the hydroxyl radical in aqueous solution was determined by pulse radiolysis from the pH dependence of the rate constant for reaction of the OH/O - radical with benzoate ions. The rate constant and the pKa( OH) values were

Reduction of Cobalt and Iron Corroles and Catalyzed Reduction of CO 2

May 1, 2002
Author(s)
J Grodkowski, Pedatsur Neta, E Fujita, A Mahammed, L Simkhovich, Z Gross
The role of cobalt and iron corroles in catalytic CO 2 reduction has been studied. Chemical, electrochemical, and photochemical reductions of the stable metal corroles Ph 3PCo III(tpfc) (tpfc = 5,10,15-tris(pentafluorophenyl)corrole), ClFe^IV^(tpfc), and

Reaction Kinetics in Ionic Liquids as Studied by Pulse Radiolysis: Redox Reactions in the Solvents Methyltributylammonium Bis(trifluoroniethyl-sulfonyl)imide and N-Butylpyridinium Tetrafluoroborate

April 1, 2002
Author(s)
D Behar, Pedatsur Neta, C R. Schultheisz
Rate constants for several reduction and oxidation reactions were determined by pulse radiolysis in three ionic liquids and compared with rate constants in other solvents. Radiolysis of the ionic liquids methyltributylammonium bis(trifluoromethylsulfonyl

Copper-Catalyzed Radiolytic Reduction of CO 2 to CO in Aqueous Solutions

May 1, 2001
Author(s)
J Grodkowski, Pedatsur Neta
Radiolysis of aqueous solutions containing CO 2 and Cu(II) ions under reducing conditions leads first to reduction of the Cu(II) and then to formation of CO. Experiments under various conditions show that although Cu(II) was often reduced to colloidal Cu(0

Manganese(III) Biliverdin IX Dimethyl Ester: A Powerful Catalytic Scavenger of Superoxide Employing the Mn(III)/Mn(IV) Redox Couple

February 1, 2001
Author(s)
I Spasojevic, I Batinic-Haberle, R D. Stevens, P Hambright, A N. Thorpe, J Grodkowski, Pedatsur Neta, I Fridovich
A manganese(III) complex of biliverdin IX dimethyl ester, Mn IIIBVDME} 2 was prepared and characterized by elemental analysis, uv/vis spectroscopy, cyclic voltammetry, chronocoulometry, electrospray mass spectrometry, freezing-point depression, magnetic

Reduction of Cobalt and Iron Phthalocyanines and the Role of the Reduced Species in Catalyzed Photoreduction of CO 2

December 1, 2000
Author(s)
J Grodkowski, T Dhanasekaran, Pedatsur Neta, P Hambright, Bruce S. Brunschwig, K Shinozaki, E Fujita
The role of cobalt and iron phthalocyanines in catalytic CO 2 reduction has been studied. Chemical, photochemical, and radiolytic reductions of the metal phthalocyanines (Pc) have been carried out in organic solvents, and reduction of their tetrasulfonated