Gamma radiolysis of aqueous solutions of. cap alpha. -cobalt(III) nitrilotriacetate

Journal Article · Mon Aug 01 04:00:00 EDT 1977 · Radiat. Res.; (United States)

DOI:https://doi.org/10.2307/3574676· OSTI ID:7282846

Bhattacharyya, S N; Srisankar, E V

Aqueous solutions of ..cap alpha..-cobalt(III) nitrilotriacetate (N) at pH 6 were irradiated with cobalt-60 ..gamma.. rays. Upon radiolysis Co(III) is reduced to Co(II) and G(-N), the reduction yield, was determined under various conditions of radiolysis. The reduction has been ascribed to direct interaction of both H and e/sup -//sub aq/ with the central metal ion. The reaction of the OH radical with N leads to the formation of iminodiacetic acid and glyoxalic acid. The degradation of the ligand has been argued as due to the possible oxidation of cobalt(III) to cobalt(IV) by the OH radical followed by oxidation of the ligand. Effects of various scavengers, e.g., t-butanol, HCOO/sup -/, NO/sub 3//sup -/, N/sub 2/O and O/sub 2/ were also studied. Competition kinetic studies were carried out by using both NO/sub 3//sup -/ and HCOO/sup -/; from the former k(e/sup -//sub aq/ + N) was found to be 9.0 x 10/sup 9/ M/sup -1/ sec/sup -1/ and from the latter k(OH + N) was found to be 3.0 x 10/sup 8/ M/sup -1/ sec/sup -1/.

• Research Organization: Saha Institute of Nuclear Physics, Calcutta
• OSTI ID: 7282846
• Journal Information: Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 71:2; ISSN RAREA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
AMINO ACIDS
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CHELATING AGENTS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
COBALT COMPLEXES
COMPLEXES
DECOMPOSITION
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
G VALUE
GAMMA RADIATION
IONIZING RADIATIONS
KINETICS
LEPTONS
LIGANDS
MIXTURES
NTA
ORGANIC ACIDS
ORGANIC COMPOUNDS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOLYSIS
REACTION KINETICS
SCAVENGING
SOLUTIONS
SOLVATED ELECTRONS
TRANSITION ELEMENT COMPLEXES