Periodate oxidation of dicyano-bis-(1, 10-phenanthroline) iron(II) dihydrate in aqueous sodium dodecyl sulphate (SDS)

摘要

Periodate oxidation of bis-(1,10-phenanthroline)-dicyano iron(II) ([Fe(C12H8N2)(CN)2]), known also as ferrocyphen, in SDS surfactant was studied in aqueous and acidic medium. The redox reaction is catalysed 124-fold in 1.220 × 10?4 mol dm?3 H2SO4 acid. The catalytic factor is much lower in absence of acid. The higher rates in acid-micelle solution are the reverse to what is observed in surfactant-free medium where acid inhibits the reaction. The results are interpreted in terms of electrostatic attraction between the protonated species and the anionic surfactant aggregates.