Publications

Displaying 51 - 75 of 76

Cobalt-Corrin Catalyzed Photoreduction of CO 2

March 1, 2000

Author(s)

J Grodkowski, Pedatsur Neta

A first attempt to use cobalt corrins (B 12) as homogeneous catalysts for photoreduction of CO 2 to CO and formic acid demonstrates that the corrins act as catalysts for this process and that they are much more efficient than cobalt porphyrins.

Development of Oxygen Scavenger Additives for Future Jet Fuels. A Role for Electron-Transfer-Initiated Oxygenation (ETIO) of 1,2,5-Trimethylpyrrole?

March 1, 2000

Author(s)

B Beaver, V Sharief, Y Teng, R DeMunshi, J P. Guo, E Katondo, D Gallagher, David M. Bunk, J Grodkowski, Pedatsur Neta

Model autoxidative, radiolytic and product studies are presented which explore the potential of 1,2,5-trimethylpyrrole (TMP) as an oxygen scavenger additive for future jet fuels. The results are consistent with a mechanism for the initial stages of the

Chemistry of Reactive Oxygen Species

December 1, 1999

Author(s)

Robert E. Huie, Pedatsur Neta

Ionizing Radiation Induced Degredation of Tetrachlorobiphenyl in Transformer Oil

December 1, 1999

Author(s)

M Chaychian, Joseph Silverman, M I. Al-Sheikhly, Dianne L. Poster, Pedatsur Neta

Oxidative Coupling of Small Oligothiophenes and Oligopyrroles in Water in the Presence of Cyclodextrin. Pulse Radiolysis Investigations

December 1, 1999

Author(s)

L Guyard, P Hapiot, M Jouini, J -. Lacrois, C Lagrost, Pedatsur Neta

Ionizing Radiation Induced Degradation of a Tetrachlorobiphenyl in Transformer Oil

November 1, 1999

Author(s)

M Chaychian, Joseph Silverman, M I. Al-Sheikhly, Dianne L. Poster, Pedatsur Neta

Complete degradation of 2,2',6,6'-tetrachlorobiphenyl (PCB 54) in transformer oil is achieved by ionizing radiation without degradation of the oil. Gamma irradiation of transformer oil containing PCB 54 (0.27 mg/g) with a dose of 200 kGy results in

Oxidative Coupling of Small Oligothiophenes and Oligopyrroles in Water in the Presence of Cyclodextrin. Pulse Radiolysis Investigations

November 1, 1999

Author(s)

L Guyard, P Hapiot, M Jouini, J -. Lacroix, C Lagrost, Pedatsur Neta

The oxidation of small oligothiophenes and oligopyrroles (bipyrroles) has been investigated by pulse radiolysis in aqueous solutions containing hydroxypropyl-Β-cyclodextrin. Oxidation by the N 3 , Cl 2 .-, or Br 2 - radicals produces the corresponding

Reduction Potentials of SO 3 -, SO 5 .-, And S 4 O 6 . 3- Radicals in Aqueous Solution

November 1, 1999

Author(s)

T N. Das, Robert E. Huie, Pedatsur Neta

Reduction potentials of the SO- 3 -, SO 5 -, and S 4O 6 3- radicals in aqueous solutions are measured by pulse radiolysis at 294 K. These radicals are produced by reaction of OH or N 3 radicals with sulfite, peroxymonosulfate, and thiosulfate anions

p-Terphenyl Sensitized Photoreduction of CO 2 With Cobalt- and Iron-Porphyrins. Interaction Between CO and Reduced Metalloporphyrins

July 1, 1999

Author(s)

T Dhanasekaran, J Grodkowski, Pedatsur Neta, P Hambright, E Fujita

Iron and cobalt porphyrins (FeP and CoP) are utilized as electron-transfer mediators to effect photochemical reduction of CO 2 in homogeneous solutions. The species that activate and reduce CO 2 are the Fe 0P and Co 0P formed by reduction of the starting

Reduction Potential of the Sulfhydryl Radical. Pulse Radiolysis and Laser Flash Photolysis Studies of the Formation and Reactions of SH and HSSH in Aqueous Solutions

July 1, 1999

Author(s)

T N. Das, Robert E. Huie, Pedatsur Neta, S Padmaja

Formation and reactions of the SH/ S and HSSH /HSS 2- radicals in aqueous solutions have been studied by excimer laser flash photolysis and by pulse radiolysis. Acidic H 2S solutions with 193-nm laser pulses produce a transient species with λ max at 240 nm

Kinetics and Mechanism of the Reaction of NH 2 with O 2 in Aqueous Solutions

July 15, 1998

Author(s)

B Laszlo, Z B. Alfassi, Pedatsur Neta, Robert E. Huie

The reaction of NH 3 with OH or SO 4 radicals produces the aminyl radical, NH 2. Pulse radiolysis and laser flash photolysis techniques were utilized to study the formation of this radical, its absorption spectrum, its reaction with O 2, and the mechanism

Mechanisms of Oxidation of 1,2,5-Trimethylpyrrole: Kinetic, Spectroscopic, and Electrochemical Studies

July 1, 1998

Author(s)

B Beaver, Y Teng, P Guiriec, P Hapiot, Pedatsur Neta

Reduction Potentials of Naphthoxyl and Pyridoxyl Radicals in Aqueous Solutions

June 19, 1998

Author(s)

T N. Das, Pedatsur Neta

Reduction potentials of 1- and 2-naphthoxyl, 2-, 3-, and 4-pyridoxyl, and 4-phenylphenoxyl radicals in alkaline aqueous solutions were determined by pulse radiolysis. The potential of 1-naphthoxyl was determined to be 0.59 V vs. NHE from the redox

Cobalt-Porphyrin Catalyzed Reduction of CO2. Radiation Chemical, Photochemical, and Electrochemical Studies

April 1, 1998

Author(s)

D Behar, T Dhanasekaran, Pedatsur Neta, C M. Hosten, D Ejeh, P Hambright, E Fujita

Cobalt-Porphyrin Catalyzed Reduction of CO 2 : Radiation Chemical, Photochemical, and Electrochemical Studies

February 25, 1998

Author(s)

D Behar, T Dhanasekaran, Pedatsur Neta, C M. Hosten, D Ejeh, P Hambright, E Fujita

Several cobalt porphyrins (CoP) have been reduced by radiation chemical, photochemical, and electrochemical methods, in aqueous and organic solvents. In aqueous solutions, the Co IP is also observed in organic solvents even in the presence of CO 2. One