ELECTROCHEMICAL STUDIES ON MASS-TRANSFER OF FERROCENE DERIVATIVES ACROSS A SINGLE-NITROBENZENE-MICRODROPLET WATER INTERFACE/

Mass transfer processes of ferrocene derivatives (FeCp-X) across a sin gle-nitrobenzene-microdroplet/water interface were studied by laser-tr apping and microelectrochemical techniques. Substituent effects of FeC p-X on the mass transfer rate were discussed in terms of the distribut ion coefficient of FeCp-X between the nitrobenzene and water phases as well as of the adsorption rate of FeCp-X on the droplet/water interfa ce. Interfacial mass transfer of ethylferrocene from water to a drople t was limited by diffusion of the molecule in the water phase, while t hat of 1-ferrocenylethanol or (N,N-dimethylamino)methylfenocene was go verned by both adsorption on the droplet/water interface and diffusion in the water phase.