Affordable Access

Publisher Website

Electron transfer reaction rates and equilibria of the carbonate and sulfate radical anions

Authors
Journal
International Journal of Radiation Applications and Instrumentation Part C Radiation Physics and Chemistry
1359-0197
Publisher
Elsevier
Publication Date
Volume
38
Issue
5
Identifiers
DOI: 10.1016/1359-0197(91)90065-a

Abstract

Abstract Electron transfer reactions of the carbonate radical anion with azide, bromide, and hypochlorite ions have been studied by pulse radiolysis. From the equilibrium Br .- 2 + CO 2- 3 ⇆ 2Br - + CO .- 3 and the known redox potential for Br .- 2/2Br - = 1.62V vs NHE we derive E = 1.59V for CO .- 3/CO 2- 3. From this value and the equilibrium CO .- 3 + ClO - ⇆ CO 2- 3 + ClO . we derive E = 1.41V for ClO ./ClO -. The equilibrium reaction SO .- 4 + Cl - ⇆ SO 2- 4 + Cl . was studied by laser photolysis, by using 248 nm excitation of S 2O 2- 8 to produce SO .- 4 and examining the rate of reaction of this radical with Cl - in the presence of varying concentrations of SO 2- 4. By modeling the reactions taking place in this system, we derive the rate constant for the reaction of Cl . with SO 2- 4 (2.5 × 10 8dm 3mol -1s -1 at 0.1 mol dm -3 ionic strength), and from the known rate constant for reaction of SO .- 4 with Cl - (4.7 × 10 8dm 3mol -1s -1 at the same ionic strength) we derive the equilibrium constant. From the known redox potential for Clf .- 2/Cl - = 2.41V we derive E = 2.43V for SO .- 4/SO 2- 4.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Theoretical study of simple electron transfer reac...

on Chemical Physics Letters Jan 01, 1990

O-transfer reactions of the carbonate radical anio...

on Radiation Physics and Chemistr... Jan 01, 1978

Electron transfer reactions from proflavin or acri...

on Radiation Physics and Chemistr... Jan 01, 1981

Intrinsic reaction parameters for electron transfe...

on The Journal of Physical Chemis... Sep 08, 2011
More articles like this..