Co-solvent effects on the redox potentials of manganese-substituted alpha-Keggin-type silicon polyoxotungstate K6SiW11O39Mn(H2O): First electrochemical generation of the manganese(V) redox system in an aqueous environment
M. Sadakane et E. Steckhan, Co-solvent effects on the redox potentials of manganese-substituted alpha-Keggin-type silicon polyoxotungstate K6SiW11O39Mn(H2O): First electrochemical generation of the manganese(V) redox system in an aqueous environment, ACT CHEM SC, 53(10), 1999, pp. 837-841
In the electrochemistry of the manganese-substituted alpha-Keggin silicon t
ungstate [K6SiW11O39Mn(II)(H2O)] in phosphate buffer, co-solvents influence
the redox potential of the manganese incorporated in the heteropolyanion.
Thus, the redox potentials of SiW11O39Mn(III/II) (H2O) and SiW11O39 Mn [(IV
)(OH)/(III)(H2O)] shift to more negative potentials on increasing the amoun
t of organic co-solvents. The organic solvents stabilize the more highly ox
idized complex. By use of this stabilization, the generation of the pentava
lent manganese-substituted silicon polyoxotungstate could be detected elect
rochemically for the first time.