Pulse radiolysis study of the kinetics and mechanisms of the reactions between manganese(II) complexes and HO/sub 2//O/sub 2//sup -/ radicals. 2. Phosphate complex and an overview

Journal Article · Thu Dec 06 04:00:00 EST 1984 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150669a047· OSTI ID:6121293

Cabelli, D E; Bielski, B H.J.

The reactions between Mn/sup 2 +/-phosphate and HO/sub 2//O/sub 2//sup -/ radicals result in the formation of transient, MnOOH/sup 2 +//MnO/sub 2//sup +/. The nonprotonated species subsequently yields the oxidized metal cation, Mn/sup 3 +/, while the protonated species can react with another Mn/sup 2 +/ to form the dinuclear transient, (MnOOHMn)/sup 4 +/; both mononuclear and dinuclear species subsequently yield Mn/sup 3 +/. Additional studies of the disappearance of MnO/sub 2//sup +/ in both formate and sulfate media established that the MnO/sub 2//sup +/-formate transient disappears by a first-order process while the MnO/sub 2//sup +/-sulfate transient reacts with O/sub 2//sup -/ at a rate about 7 times as fast. These results, along with those reported previously, have led to the formulation of a general mechanism to describe the reactions between Mn/sup 2 +/ complexes and HO/sub 2//O/sub 2//sup -/ radicals.

• Research Organization: Brookhaven National Lab., Upton, NY
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6121293
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 88:25; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400600 -- Radiation Chemistry
BEAMS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DECOMPOSITION
ELECTRON BEAMS
EXPERIMENTAL DATA
HYDROXYL RADICALS
INFORMATION
IRRADIATION
KINETICS
LEPTON BEAMS
MANGANESE COMPOUNDS
MANGANESE PHOSPHATES
NUMERICAL DATA
OXYGEN COMPOUNDS
PARTICLE BEAMS
PEROXY RADICALS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PULSED IRRADIATION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
REACTION KINETICS
TRANSITION ELEMENT COMPOUNDS