Spin-spin interactions in iron(III) porphyrin radical cations with ruffled and saddled structure

Souhei Kouno, Akira Ikezaki, Takahisa Ikeue, Mikio Nakamura

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Oxidation of essentially pure intermediate-spin iron(III) porphyrinates such as ruffled Fe(TiPrP)ClO4 and saddled Fe(OETPP)ClO4 produces the corresponding six-coordinate iron(III) porphyrin(por) radical cations [Fe(Por)(ClO4)2], where TiPrP and OETPP are dianions of 5,10,15,20-tetraisopropylporphyrin and 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrin, respectively. Spin-spin interactions in these complexes are very much different; while ruffled [Fe(TiPrP)(ClO4)2] exhibits no antiferromagnetic coupling, saddled [Fe(OETPP)(ClO4)2] does exhibit it. The difference in magnetic behaviors has been explained in terms of the deformation mode and electron configuration of these complexes.

Original languageEnglish
Pages (from-to)718-721
Number of pages4
JournalJournal of Inorganic Biochemistry
Volume105
Issue number5
DOIs
Publication statusPublished - 2011 May
Externally publishedYes

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Porphyrins
Cations
Iron
perchlorate
Electrons
Oxidation

Keywords

  • Iron(III)
  • One-electron oxidation
  • Porphyrin complexes
  • Radical cation
  • Spin state

ASJC Scopus subject areas

  • Biochemistry
  • Inorganic Chemistry

Cite this

Spin-spin interactions in iron(III) porphyrin radical cations with ruffled and saddled structure. / Kouno, Souhei; Ikezaki, Akira; Ikeue, Takahisa; Nakamura, Mikio.

In: Journal of Inorganic Biochemistry, Vol. 105, No. 5, 05.2011, p. 718-721.

Research output: Contribution to journalArticle

Kouno, Souhei ; Ikezaki, Akira ; Ikeue, Takahisa ; Nakamura, Mikio. / Spin-spin interactions in iron(III) porphyrin radical cations with ruffled and saddled structure. In: Journal of Inorganic Biochemistry. 2011 ; Vol. 105, No. 5. pp. 718-721.
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N2 - Oxidation of essentially pure intermediate-spin iron(III) porphyrinates such as ruffled Fe(TiPrP)ClO4 and saddled Fe(OETPP)ClO4 produces the corresponding six-coordinate iron(III) porphyrin(por) radical cations [Fe(Por)(ClO4)2], where TiPrP and OETPP are dianions of 5,10,15,20-tetraisopropylporphyrin and 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrin, respectively. Spin-spin interactions in these complexes are very much different; while ruffled [Fe(TiPrP)(ClO4)2] exhibits no antiferromagnetic coupling, saddled [Fe(OETPP)(ClO4)2] does exhibit it. The difference in magnetic behaviors has been explained in terms of the deformation mode and electron configuration of these complexes.

AB - Oxidation of essentially pure intermediate-spin iron(III) porphyrinates such as ruffled Fe(TiPrP)ClO4 and saddled Fe(OETPP)ClO4 produces the corresponding six-coordinate iron(III) porphyrin(por) radical cations [Fe(Por)(ClO4)2], where TiPrP and OETPP are dianions of 5,10,15,20-tetraisopropylporphyrin and 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrin, respectively. Spin-spin interactions in these complexes are very much different; while ruffled [Fe(TiPrP)(ClO4)2] exhibits no antiferromagnetic coupling, saddled [Fe(OETPP)(ClO4)2] does exhibit it. The difference in magnetic behaviors has been explained in terms of the deformation mode and electron configuration of these complexes.

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