89438-84-6Relevant academic research and scientific papers
Synthetic model approach to the active site of cytochrome c Oxidase: Studies of a heterodinuclear iron(III) porphyrin-copper(II) tripeptide complex
Elliott, C. Michael,Jain, Nemi C.,Cranmer, Brian K.,Hamburg, Arlene W.
, p. 3655 - 3659 (2008/10/08)
The reaction in THF of iron(II) meso-tetraphenylporphyrin, FeIITPP, with CuIII(aib3), where aib3 is the tripeptide of α-amino-isobutyric acid, results in the formation of a neutral heterodinuclear complex, [FeIII(TPP)CuII(aib3)] (1). Optical, conductance, electrochemical, magnetic, EPR, and Mo?ssbauer data are reported for the dinuclear complex 1. Isosbestic behavior is exhibited at 600, 525, and 415 nm by solutions of FeIITPP to which varying amounts of CuIII(aib3) are added, indicating the formation of 1. EPR and Mo?ssbauer spectra provide evidence for the presence of a high-spin (S = 5/2) iron(III) and (S = 1/2) copper(II) in complex 1. A weak antiferromagnetic interaction between the iron and copper is evident from the EPR measurements. While the magnetic interaction is weak, electrochemical and conductometric results indicate that the anionic CuII(aib3)- complex is moderately strongly bound to the FeIIITPP+.
