A study of the redox potentials and electron transfer rates of several naturally occurring and synthetic iron porphyrins in DMF

摘要: Abstract The reduction potentials and formal electron transfer rate constants of several iron porphyrins were measured in DMF by the technique cyclic voltammetry. ease each was found to be a function porphyrin ring basicity dependent on type electrode reaction. Greatest effects observed for π anion radical formation while smaller obtained reactions involving central metal. Electron ferric-ferrous reaction also varied with paralled trends redox potentials, that is, most basic yielded difficult reduction, both kinetically thermodynamically, least prophyrin facile kinetic thermodynamic reduction. Based this data mechanism via system is proposed.