DIFFERENTIAL CYCLIC VOLTABSORPTOMETRY AND CHRONOABSORPTOMETRY STUDIESOF ION TRANSFER-REACTIONS AT THE WATER-VERTICAL-BAR-1,2-DICHLOROETHANE INTERFACE

The combination of UV-visible absorption spectroscopy and conventional liquid/liquid electrochemistry is applied to study ion transfer at th e liquid/liquid interface. Two separate examples of ion transfer are i nvestigated. Results for Ru(bpy)(3)(2+) and the dianionic form of Eosi n B transfer from water to 1,2-dichloroethane, obtained using total in ternal reflection absorption spectroscopy, are presented. The techniqu es of differential cyclic voltabsorptometry and chronoabsorptometry ar e investigated and shown both to be specific to individual species and to produce responses analogous to conventional electrochemistry. A si mple theory is presented and found to be an accurate description of th e spectroscopic methodology.