Structure of porphyrins in relation to reversible oxidation and reduction reactions

F. J. Ryan*, R. A. Bambara, P. A. Loach

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A variety of porphyrin derivatives were synthesized in order to determine the effect of certain structural features on the oxidation-reduction properties of these complexes. It was found that a fifth ring, such as the isocyclic ring of chlorins was without significant effect on the one-electron oxidation properties of a magnesium tetrahydroporphyrin (bacteriochlorophyll), Fe(II) porphyrin complexes, or Fe(II) chlorin complexes. On the other hand, large positive shifts of the midpoint potentials for oxidation of Fe(II) derivatives were found when the porphyrin ring was reduced to a chlorin structure.

Original languageEnglish (US)
Pages (from-to)44-58
Number of pages15
JournalBioorganic Chemistry
Issue number1
StatePublished - Sep 1972

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Drug Discovery
  • Organic Chemistry


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