The Utilization of Ferrocyanide/Ferricyanide as a New Redox-Pair in the Drop Electrode System

Abstract

Ion transfer voltammetry at liquid-liquid interfaces supported on a metallic electrode has been investigated to evaluate ferrocyanide/ferricyanide (K3Fe(CN)6 /K4Fe(CN)6) as a new redox pair in the aqueous droplet immersed into the organic phase 1,2-DCE. To this purpose, the drop system has been extended to the adsorption-desorption processes associated with the complex formation between aqueous cations and the phospholipid dipalmitoylposphatidylcholine (DPPC) at the polarizable water/1,2-DCE interface in the drop electrode system. From the cyclic voltammetry experiments, the redox couple ferrocyanide/ferricyanide has been shown to be a useful candidate for ion transfer voltammetry application in liquid-liquid soft interfaces.