Interpreting diffusion coefficients of electrochemical probes in oil‐in‐water microemulsions

Abstract

Abstract The relationship between apparent diffusion coefficients, D ′, of electroactive probe and thc microstructure of an oil‐in‐water anionic microemulsion, sodium dodecyl sulfate (SDS)/dodecane/I‐pentanol/0.1M NaCI aq has been investigated. Three probes, ferrocene (Fc), Fe(CN) and methyl viologen (MV 2+ ) allowed the effect of ditrerent microstructure and interactions on the D ′‐values to be investigated. The results indicate that the droplet as well as hicontinuous microemulsion structures can be identified and point to the effects of cross‐ phase exchange, partitioning, and multiple binding on the D ′‐values.