Saddle-shaped six-coordinate iron(III) porphyrin complexes showing a novel spin crossover between S = 1/2 and S = 3/2 spin states

Takahisa Ikeue, Yoshiki Ohgo, Tatsuya Yamaguchi, Masashi Takahashi, Masuo Takeda, Mikio Nakamura

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

The field strength of the axial ligands determines the spin state of saddled iron(III) porphyrin complexes (see picture). Strong axial ligands (L), such as imidazole and 4-dimethylaminopyridine, lead to the formation of complexes with a pure S = 1/2 state, while weak ligands, such as THF, give complexes with a pure S = 3/2 state. Intermediate strength ligands, such as pyridine and 4-cyanopyridine, give complexes that show a novel spin crossover between the S = 1/2 and S = 3/2 states.

Original languageEnglish
Pages (from-to)2617-2620
Number of pages4
JournalAngewandte Chemie - International Edition
Volume40
Issue number14
DOIs
Publication statusPublished - 2001 Jul 16

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Keywords

  • Iron
  • Magnetic properties
  • Moessbauer spectroscopy
  • Porphyrinoids
  • Spin crossover

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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