The same type of conversion is true for other metal ions capable of oxidizing HQ to BQ via SQ formation. Being a strong oxidizing agent,KMnO4 has tremendous capability of oxidizing HQ to BQ in the same fashion as true in case of Cu(II), however the role of Mn(VII) in DNA damage has not been reported so far.
Fig. 2 describes the conversion of 1gml−1 aqueous HQ into HQ (λmax, 288nm), SQ (λmax, 222nm) and BQ (λmax, 245.5nm) in the absence and presence of KMnO4 solution. It is evident from the figure that after dissolution of HQ in water, the formation of SQ radical occurs which is due to photo-oxidation of HQ. BQ is also formed but after a very long time