INVESTIGATION OF THE KINETICS OF ION AND ASSISTED ION TRANSFER BY THETECHNIQUE OF AC-IMPEDANCE OF THE MICRO-ITIES

The microhole and micropipette tip-supported interface between two imm iscible electrolyte solutions (TTIES) were used to study the kinetics of ion and assisted ion transfer reactions, respectively, using the te chnique of ac impedance. The ion transfer reaction studied was that of tetramethylammonium transfer between water and 1,2-dichloroethane (1, 2-DCE). The assisted ion transfer process investigated was that of pot assium, facilitated by dibenzo-18-crown-6, between the same solvents. Tn each case, the standard apparent rate constant, k(o), was demonstra ted to be a quantity which is inaccessible to measurement by electroch emical means. Both reactions were illustrated to be controlled by the diffusion of the participating species only.