Structure of porphyrins in relation to reversible oxidation and reduction reactions

F. J. Ryan; R. A. Bambara; Paul A Loach

doi:10.1016/0045-2068(73)90006-0

Structure of porphyrins in relation to reversible oxidation and reduction reactions

F. J. Ryan^*, R. A. Bambara, Paul A Loach

^*Corresponding author for this work

Molecular Biosciences

Research output: Contribution to journal › Article

5 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	44-58
Number of pages	15
Journal	Bioorganic Chemistry
Volume	2
Issue number	1
DOIs	https://doi.org/10.1016/0045-2068(73)90006-0
State	Published - Jan 1 1972

ASJC Scopus subject areas

Biochemistry
Molecular Biology
Drug Discovery
Organic Chemistry

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Ryan, F. J., Bambara, R. A., & Loach, P. A. (1972). Structure of porphyrins in relation to reversible oxidation and reduction reactions. Bioorganic Chemistry, 2(1), 44-58. https://doi.org/10.1016/0045-2068(73)90006-0

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AB - 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.

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