The one-electron reduction of a multi-centred iron(III) polyoxometallate. A pulse radiolysis study

The single electron reduction of the complex [P8W48O184Fe16(OH)28(H2O)4]20− by the hydrated electron yields the mixed-valence complex [P8W48O184FeIIFeIII15(OH)28–(H2O)4]21− which has an intervalence charge transfer band in the near I.R. This result points out that there is a strong interaction between the iron centres. The formation of [P8W48O184FeIIFeIII15–(OH)28(H2O)4]21− is followed by the loss of the FeII centre and the rearrangement of the remaining Fe15III cluster.