A pulse-radiolysis study on the kinetics of reaction of PW12O404- heteropolytungstate blue with Np(VI) ions in aqueous acid solutions

Data on the kinetics of redox reactions with the participation of heteropoly compounds may be of interest in photochemistry, radiation chemistry, catalysis, and other branches of physical chemistry. The structure of heteropoly blues is the same as that of the initial heteropoly compounds. Because of this, the oxidation of blues by metal ions can proceed quite readily. Presently, data on the interaction of blues with 5f-element ions is lacking. As a part of a systematic study on the reactivity of free radicals and excited species to actinide ions, the authors used a pulse-radiolysis technique to determine the rate constant of the reaction: Np(VI) + PW12O404- → Np(V) + PW12O403-, k1 = ? The ions of Np(VI) were chosen as oxidizing agents because of their relatively high redox potential (1.13 V), and the resemblance of the structure of Np(VI) and Np(V) ions