In Situ XANES of an Iron Porphyrin Irreversibly Adsorbed on an Electrode Surface

Sunghyun Kim, Marnita Sandifer, Daniel Alberto Scherson, In Tae Bae, Mark R. Antonio, Philip N. Ross, Roger Carr, Joseph Woicik

研究成果: Article査読

39 被引用数 (Scopus)

抄録

In situ iron K-edge X-ray absorption near edge structure, XANES, has been employed to examine the axial coordination of (µ-OXO)bis [iron meso-tetrakis(4-methoxyphenyl)porphyrin] (FeTMPP) 2 O, irreversibly adsorbed on a high area carbon substrate, Black Pearl (BP), as a function of applied potential. Analysis of the XANES provides conclusive evidence that the coordination about Fe 3+ in the supported, fully oxidized macrocycle is remarkably different from that about Fe 2+ in the corresponding fully reduced macrocycle. In the adsorbed, oxidized state, (FeTMPP) 2 O retains its µ-OXO character and it undergoes a two-electron reduction to yield predominantly four-coordinate square-planar FeTMPP without axial ligation.

本文言語English
ページ(範囲)9063-9066
ページ数4
ジャーナルJournal of the American Chemical Society
113
24
DOI
出版ステータスPublished - 1991 11 1
外部発表はい

ASJC Scopus subject areas

  • 触媒
  • 化学 (全般)
  • 生化学
  • コロイド化学および表面化学

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