Kinetics of radiation. Chemical processes in isopolymolybdates and isopolytungstates

Abstract

The kinetics of radiation reduction of Mo(VI) and W(VI) in aqueous formic acid or acidified methanol solutions has been studied. The rate constants of radiation-chemical processes have been measured by pulse radiolysis technique. It has been shown that the reduction of polytungstates in aqueous formic acid solutions, contrary to polymolybdates whose reduction proceeds via lower oxidation states, leads directly to W(V) compounds. In acidified aqueous methanol solutions the isopolymetallate blues are the only optically detected products of the reduction.