Models for cytochromes c′: Observation of an extremely labile spin state in monoimidazole complexes of saddle-shaped iron(III) porphyrinates

Akira Ikezaki; Masashi Takahashi; Mikio Nakamura

doi:10.1002/anie.200902224

Models for cytochromes c′: Observation of an extremely labile spin state in monoimidazole complexes of saddle-shaped iron(III) porphyrinates

Akira Ikezaki, Masashi Takahashi, Mikio Nakamura

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Saddle in a spin: The saddle-shaped octaethyltetraphenylporphyrin-imidazole complex [Fe^III (oetpp)(HIm)]⁺ adopts an essentially pure intermediate-spin state between 298 and 173 K in CD₂Cl₂ solution, the conditions under which the NMR spectra are recorded. This complex has shown, however, a novel spin transition from S=3/2 to S=5/2 and S=1/2 below 70 K. Thus, the complex exists as an equilibrium mixture of three spin isomers at 4 K.

Original language	English
Pages (from-to)	6300-6303
Number of pages	4
Journal	Angewandte Chemie - International Edition
Volume	48
Issue number	34
DOIs	https://doi.org/10.1002/anie.200902224
Publication status	Published - 2009 Aug 10
Externally published	Yes

Keywords

Cytochromes
Imidazoles
Iron
Porphyrinoids
Spin states

ASJC Scopus subject areas

Catalysis
Chemistry(all)

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10.1002/anie.200902224

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abstract = "Saddle in a spin: The saddle-shaped octaethyltetraphenylporphyrin-imidazole complex [FeIII (oetpp)(HIm)]+ adopts an essentially pure intermediate-spin state between 298 and 173 K in CD2Cl2 solution, the conditions under which the NMR spectra are recorded. This complex has shown, however, a novel spin transition from S=3/2 to S=5/2 and S=1/2 below 70 K. Thus, the complex exists as an equilibrium mixture of three spin isomers at 4 K.",

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AU - Takahashi, Masashi

AU - Nakamura, Mikio

PY - 2009/8/10

Y1 - 2009/8/10

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AB - Saddle in a spin: The saddle-shaped octaethyltetraphenylporphyrin-imidazole complex [FeIII (oetpp)(HIm)]+ adopts an essentially pure intermediate-spin state between 298 and 173 K in CD2Cl2 solution, the conditions under which the NMR spectra are recorded. This complex has shown, however, a novel spin transition from S=3/2 to S=5/2 and S=1/2 below 70 K. Thus, the complex exists as an equilibrium mixture of three spin isomers at 4 K.

KW - Cytochromes

KW - Imidazoles

KW - Iron

KW - Porphyrinoids

KW - Spin states

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Models for cytochromes c′: Observation of an extremely labile spin state in monoimidazole complexes of saddle-shaped iron(III) porphyrinates

Abstract

Keywords

ASJC Scopus subject areas

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