Abrupt spin transition with thermal hysteresis of iron(III) complex [FeIII(Him)2(hapen)]AsF6 (Him = Imidazole, H2hapen = N, N ′-Bis(2-hydroxyacetophenylidene)ethylenediamine)

Takeshi Fujinami; Masataka Koike; Naohide Matsumoto; Yukinari Sunatsuki; Atsushi Okazawa; Norimichi Kojima

doi:10.1021/ic402947u

Abrupt spin transition with thermal hysteresis of iron(III) complex [Fe^III(Him)₂(hapen)]AsF₆ (Him = Imidazole, H₂hapen = N, N ′-Bis(2-hydroxyacetophenylidene)ethylenediamine)

Takeshi Fujinami, Masataka Koike, Naohide Matsumoto, Yukinari Sunatsuki, Atsushi Okazawa, Norimichi Kojima

Advanced Science Research Center

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

21 Citations (Scopus)

Abstract

The solvent-free spin crossover iron(III) complex [Fe^III(Him) ₂(hapen)]AsF₆ (Him = imidazole, H₂hapen = N,N′-bis(2-hydroxyacetophenylidene)ethylenediamine), exhibiting thermal hysteresis, was synthesized and characterized. The Fe^III ion has an octahedral coordination geometry, with N₂O₂ donor atoms of the planar tetradentate ligand (hapen) and two nitrogen atoms of two imidazoles at the axial positions. One of two imidazoles is hydrogen-bonded to the phenoxo oxygen atom of hapen of the adjacent unit to give a hydrogen-bonded one-dimensional chain, while the other imidazole group is free from hydrogen bonding. The temperature dependencies of the magnetic susceptibilities and Mössbauer spectra revealed an abrupt spin transition between the high-spin (S = 5/2) and low-spin (S = 1/2) states, with thermal hysteresis.

Original language	English
Pages (from-to)	2254-2259
Number of pages	6
Journal	Inorganic Chemistry
Volume	53
Issue number	4
DOIs	https://doi.org/10.1021/ic402947u
Publication status	Published - Feb 17 2014

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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Abrupt spin transition with thermal hysteresis of iron(III) complex [Fe^III(Him)₂(hapen)]AsF₆ (Him = Imidazole, H₂hapen = N, N ′-Bis(2-hydroxyacetophenylidene)ethylenediamine). / Fujinami, Takeshi; Koike, Masataka; Matsumoto, Naohide et al.

In: Inorganic Chemistry, Vol. 53, No. 4, 17.02.2014, p. 2254-2259.

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

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title = "Abrupt spin transition with thermal hysteresis of iron(III) complex [FeIII(Him)2(hapen)]AsF6 (Him = Imidazole, H2hapen = N, N ′-Bis(2-hydroxyacetophenylidene)ethylenediamine)",

abstract = "The solvent-free spin crossover iron(III) complex [FeIII(Him) 2(hapen)]AsF6 (Him = imidazole, H2hapen = N,N′-bis(2-hydroxyacetophenylidene)ethylenediamine), exhibiting thermal hysteresis, was synthesized and characterized. The FeIII ion has an octahedral coordination geometry, with N2O2 donor atoms of the planar tetradentate ligand (hapen) and two nitrogen atoms of two imidazoles at the axial positions. One of two imidazoles is hydrogen-bonded to the phenoxo oxygen atom of hapen of the adjacent unit to give a hydrogen-bonded one-dimensional chain, while the other imidazole group is free from hydrogen bonding. The temperature dependencies of the magnetic susceptibilities and M{\"o}ssbauer spectra revealed an abrupt spin transition between the high-spin (S = 5/2) and low-spin (S = 1/2) states, with thermal hysteresis.",

author = "Takeshi Fujinami and Masataka Koike and Naohide Matsumoto and Yukinari Sunatsuki and Atsushi Okazawa and Norimichi Kojima",

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AU - Fujinami, Takeshi

AU - Koike, Masataka

AU - Matsumoto, Naohide

AU - Sunatsuki, Yukinari

AU - Okazawa, Atsushi

AU - Kojima, Norimichi

PY - 2014/2/17

Y1 - 2014/2/17

N2 - The solvent-free spin crossover iron(III) complex [FeIII(Him) 2(hapen)]AsF6 (Him = imidazole, H2hapen = N,N′-bis(2-hydroxyacetophenylidene)ethylenediamine), exhibiting thermal hysteresis, was synthesized and characterized. The FeIII ion has an octahedral coordination geometry, with N2O2 donor atoms of the planar tetradentate ligand (hapen) and two nitrogen atoms of two imidazoles at the axial positions. One of two imidazoles is hydrogen-bonded to the phenoxo oxygen atom of hapen of the adjacent unit to give a hydrogen-bonded one-dimensional chain, while the other imidazole group is free from hydrogen bonding. The temperature dependencies of the magnetic susceptibilities and Mössbauer spectra revealed an abrupt spin transition between the high-spin (S = 5/2) and low-spin (S = 1/2) states, with thermal hysteresis.

AB - The solvent-free spin crossover iron(III) complex [FeIII(Him) 2(hapen)]AsF6 (Him = imidazole, H2hapen = N,N′-bis(2-hydroxyacetophenylidene)ethylenediamine), exhibiting thermal hysteresis, was synthesized and characterized. The FeIII ion has an octahedral coordination geometry, with N2O2 donor atoms of the planar tetradentate ligand (hapen) and two nitrogen atoms of two imidazoles at the axial positions. One of two imidazoles is hydrogen-bonded to the phenoxo oxygen atom of hapen of the adjacent unit to give a hydrogen-bonded one-dimensional chain, while the other imidazole group is free from hydrogen bonding. The temperature dependencies of the magnetic susceptibilities and Mössbauer spectra revealed an abrupt spin transition between the high-spin (S = 5/2) and low-spin (S = 1/2) states, with thermal hysteresis.

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Abrupt spin transition with thermal hysteresis of iron(III) complex [Fe^III(Him)₂(hapen)]AsF₆ (Him = Imidazole, H₂hapen = N, N ′-Bis(2-hydroxyacetophenylidene)ethylenediamine)

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