Metal ion-coupled electron transfer of a nonheme oxoiron(IV) complex: remarkable enhancement of electron-transfer rates by Sc3+

J Am Chem Soc. 2011 Jan 26;133(3):403-5. doi: 10.1021/ja109056x. Epub 2010 Dec 15.

Abstract

Rates of electron transfer from a series of one-electron reductants to a nonheme oxoiron(IV) complex, [(N4Py)Fe(IV)(O)](2+), are enhanced as much as 10(8)-fold by addition of metal ions such as Sc(3+), Zn(2+), Mg(2+), and Ca(2+); the metal ion effect follows the Lewis acidity of metal ions. The one-electron reduction potential of [(N4Py)Fe(IV)(O)](2+) is shifted to a positive direction by 0.84 V in the presence of Sc(3+) ion (0.20 M).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Electron Spin Resonance Spectroscopy
  • Electron Transport
  • Heme / chemistry
  • Iron Compounds / chemistry*
  • Metals / chemistry*
  • Scandium / chemistry*

Substances

  • Iron Compounds
  • Metals
  • Heme
  • Scandium