Electrochemical and spectroscopic monitoring of the interaction between hydrogen peroxide and tungstophosphate heteropolyanion in homogeneous phase and in a polymer matrix

Abstract

AbstractCyclic voltammetry and UV‐visible spectroscopy have‐been used to monitor the reaction of tungstophosphate anion (PW12O3−40, abbreviated PW12 with hydrogen peroxide. The structures of some of the resulting peroxy complexes were also studied by IR spectroscopy. Depending on the experimental conditions, two different series of peroxy compounds are obtained as major products. It is also Shown that these species are easily extracted into a poly(4‐vinylpyridinium) film (PVP). Alternatively, the synthesis of, the peroxy, compounds has been performed directly by contacting a PVP film containing PW12 with an H2O2 solution. The facile entrapping of this series of peroxides in an appropriate polymer matrix creates new assemblies, stable and useful in the detection and study of the true catalytic species in oxygen transfer processes based on heteropolyanion/H2O2 systems.