ABSTRACT
The structure and dynamics of the liquid-liquid interface have been the focus of considerable research activity [1]. In addition to fundamental interest, the charge transfer (CT) reactions occurring at the liquid-liquid interface, that is, electron transfer (ET), simple ion transfer (IT), and facilitated IT, are relevant to important technological systems from chemical sensors to drug delivery in pharmacology to solvent extraction in hydrometallurgy [1,2]. At the interface between two immiscible electrolyte solutions (ITIES), one can conduct reactions that cannot occur at solid electrodes,
8.1 Introduction .......................................................................................................................... 191 8.2 Electron Transfer .................................................................................................................. 192
8.2.1 Electron Transfer at the Clear ITIES ........................................................................ 192 8.2.1.1 Principles of SECM/ITIES Measurements ............................................... 192 8.2.1.2 SECM Apparatus and Procedure ............................................................... 195 8.2.1.3 Separation of ET from IT and Solute Partitioning Processes .................... 196 8.2.1.4 Potential Drop across a Nonpolarized ITIES ............................................ 198 8.2.1.5 Potential Dependence of Heterogeneous Rate Constant of
ET at the ITIES .......................................................................................... 199 8.2.1.6 ET Rate as a Function of the Standard Potential Difference .....................202
