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- W4253386370 abstract "Comparisons are made between Co, Cr, Fe and Zn metalloporphyrin redox potentials. For TPPCoClO4, TPPFeClO4, and TPPMnClO4, the redox potentials for the M(III) ⇌ M(II) reductions shift in a negative direction as the coordinating ability of the solvent increases. Comparisons are made between potentials for a series of TPPFeX and OEPFeX complexes. Changing the counter ion from ClO−4 to Cl−, Br−, N−3, or F− reverses the direction of the potential shift with coordinating ability of the solvent. The half-wave potentials for each metal-centered and ring-centered metalloporphyrin reaction also shift upon axial binding of nitrogenous bases. Eleven substituted pyridines were utilized as axial ligands. For Cr, Fe and Zn, U12 shifts in a negative direction as the pKa increases, while Mn shows U12 which shifts positively with the pKa of an axially complexed ligand. Redox tuning of metalloporphyrin reactivity is discussed as a function of axial complexation by solvent, counter-ion and/or nitrogenous base molecules." @default.
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- W4253386370 date "1981-04-01" @default.
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- W4253386370 title "417 - On the tuning of metalloporphyrin redox potentials" @default.
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- W4253386370 doi "https://doi.org/10.1016/0302-4598(81)80042-6" @default.
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