Analytical Sciences

Abstract − Analytical Sciences, 20(11), 1613 (2004).

Voltammetric Study of Interfacial Electron Transfer between Bis(cyclopentadienyl)iron in Organic Solvents and Hexacyanoferrate in Water
Hirosuke TATSUMI and Hajime KATANO
Department of Bioscience, Fukui Prefectural University, Matsuoka, Fukui 910-1195, Japan
The electron-transfer reaction between bis(cyclopentadienyl)iron(II) ([FeII(C5H5)2]) in nitrobenzene and a hexacyanoferrate redox couple ([FeII/III(CN)6]-4/3-) in water at the nitrobenzene | water interface was studied using normal pulse voltammetry. The voltammetric results indicate that the electron-transfer reaction takes place by way of a so-called ion-transfer (IT) mechanism, of which the forward and backward rate constants of the homogeneous electron-transfer reaction between [FeII/III(C5H5)2]0/+ and [FeII/III(CN)6]4-/3- in the water phase have been determined. The electron-transfer reaction between [FeII(C5H5)2] in 1,2-dichloroethane and [FeII/III(CN)6]4-/3- in water at the 1,2-dichloroethane | water interface was shown to also take place by the IT-mechanism.