Preparation and electrochemical behavior of a macrocyclic heterodinuclear Fe IIICo III complex

Abstract

A new macrocyclic heterodinuclear Fe IIICo III complex, prepared by the condensation of 2,6-diformylpyridine N-oxide with 1,3-diaminopropane in the presence of FeCl 2.4H 2O and CoCl 2.6H 2O, and formulated as FeCoLCl 6.C 2H 5OH.8H 2O, was characterized by elemental analyses, IR and Mössbauer spectra and investigated electrochemically on an ultramicrodisk platinum electrode. The results show that the electrode reaction can be thought as a nearly reversible transfer process. The diffusion coefficient is 1.93×10 -6 m 2 s -1 and E o ̄ is −0.229V (versus s.c.e) and α=0.877. The average electron transfer rate constant k o′ is 3.21×10 -3 cm s -1.