Tuning the thermodynamic onset potential of electrocatalytic O2 reduction reaction by synthetic iron-porphyrin complexes

Chem Commun (Camb). 2015 Jun 21;51(49):10010-3. doi: 10.1039/c5cc01938a.

Abstract

A porphyrin ligand with two β-pyrrolic electron withdrawing ester groups is synthesized and its Co complex is crystallographically characterized. The iron complex of this porphyrin ligand shows an ∼200 mV positive shift in its Fe(III/II) potential in organic as well as aqueous solvents and in the onset potential of ORR relative to that of an unsubstituted porphyrin.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Electrochemistry
  • Iron / chemistry*
  • Ligands
  • Metalloporphyrins / chemical synthesis
  • Metalloporphyrins / chemistry*
  • Models, Molecular
  • Molecular Conformation
  • Oxidation-Reduction
  • Oxygen / chemistry*
  • Solvents / chemistry
  • Thermodynamics

Substances

  • Ligands
  • Metalloporphyrins
  • Solvents
  • Iron
  • Oxygen