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

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 NaCIaq has been investigated. Three probes, ferrocene (Fc), Fe(CN) and methyl viologen (MV2+) 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.