ELECTRON SELF-EXCHANGE IN REDOX POLYMERS - 2 - A STUDY OF ION AGGREGATION AND INTERMOLECULAR INTERACTIONS

The diffusion-migration equation (derived in part 1) is subjected to t he analysis of steady-state current-potential responses and the effect s of intermolecular interaction between neighboring particles and ion association between the electroactive and electroinactive species on m aximal limiting current and the corresponding redox composition are st udied both in the presence and absence of site diluent. The variation of the apparent diffusion coefficient with molar fraction of redox act ive species is analyzed as a function of the ion pairing constant and interaction energetics. The steady-state analysis suggests that the tr ansport equation is valid only for a small region of interaction energ y and breaks down when its value exceeds the order of k(B)T. The possi bility of phase separation in redox polymers is also discussed.