Charge transfer phase transition and ferromagnetism in a mixed-valence iron complex, (n-C3H7)4N[FeIIFeIII(dto)3] (dto=C2O2S2)

Kojima, Naoya; Aoki, Wataru; Itoi, M; Ono, Yoshiyuki; Seto, Makoto; Kobayashi, Yasuhiro; Maeda, Yoko

doi:10.1016/s0038-1098(01)00366-0

Cited by 71 publications

(55 citation statements)

References 12 publications

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“…(89,90) Since the ligand field at the [FeS 6 ] site is much stronger than that at the [FeO 6 ] site, the iron ion surrounded by sulfur atoms is characterized by low-spin state, while that surrounded by oxygen atoms shows high-spin state. As shown in figure 24, (88) (78,79) the whole [FeO 6 ][FeS 6 ] system by the electron transfer, this phenomenon seems to be, at first glance, spin crossover. However, this is not the case, because the spin state at a given site always remains either HS-or LS-state when the electron transfer occurs.…”

Section: Spin State Conversion Due To Electron-transfer In the Mixed-mentioning

confidence: 94%

“…(87) As schematically drawn in figure 23, (88) two kinds of iron ions are anticipated to be octahedrally coordinated by six O atoms, [FeO 6 ], and six S atoms, [FeS 6 ], from the analogy of similar oxalato complexes. (89,90) Since the ligand field at the [FeS 6 ] site is much stronger than that at the [FeO 6 ] site, the iron ion surrounded by sulfur atoms is characterized by low-spin state, while that surrounded by oxygen atoms shows high-spin state.…”

Section: Spin State Conversion Due To Electron-transfer In the Mixed-mentioning

confidence: 99%

“…(92) The anomaly at T = 122.4 K obviously arises from the electron transfer phenomenon, because the transition temperature agrees well with the temperature where the anomly is observed in the magnetic susceptibility. (88) Although the phase transition at T = 122.4 K does not occur isothermally, this should be regarded as a first-order phase transition because supercooling has been observed.…”

Section: Spin State Conversion Due To Electron-transfer In the Mixed-mentioning

confidence: 99%

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Calorimetric investigations of phase transitions in which electrons are directly involved

Sorai

2002

The Journal of Chemical Thermodynamics

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Section: Spin State Conversion Due To Electron-transfer In the Mixed-mentioning

confidence: 94%

Section: Spin State Conversion Due To Electron-transfer In the Mixed-mentioning

confidence: 99%

Section: Spin State Conversion Due To Electron-transfer In the Mixed-mentioning

confidence: 99%

See 1 more Smart Citation

Calorimetric investigations of phase transitions in which electrons are directly involved

Sorai

2002

The Journal of Chemical Thermodynamics

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“…This strategy produced a large series of multifunctional molecular materials where the magnetic ordering of the bimetallic layers coexists or even interacts with other properties arising from the cationic layers, such as paramagnetism [2,[76][77][78][79][80], non-linear optical properties [2,81,82], metal-like conductivity [83,84], photochromism [2,81,85,86], photoisomerism [87], spin crossover [88][89][90][91][92][93], chirality [94][95][96][97], or proton conductivity [2,98,99]. Moreover, it is well-established that the ordering temperatures of these layered magnets are not sensitive to the separation determined by the cations incorporated between the layers, which slightly affects the magnetic properties of the resulting hybrid material, by emphasizing its 2D magnetic character [2,[75][76][77][78][79][80]95,100,101]. The most effective way to tune the magnetic properties of such systems is to act directly on the exchange pathways within the bimetallic layers.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances on Anilato-Based Molecular Materials with Magnetic and/or Conducting Properties

et al. 2017

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Abstract:The aim of the present work is to highlight the unique role of anilato-ligands, derivatives of the 2,5-dioxy-1,4-benzoquinone framework containing various substituents at the 3 and 6 positions (X = H, Cl, Br, I, CN, etc.), in engineering a great variety of new materials showing peculiar magnetic and/or conducting properties. Homoleptic anilato-based molecular building blocks and related materials will be discussed. Selected examples of such materials, spanning from graphene-related layered magnetic materials to intercalated supramolecular arrays, ferromagnetic 3D monometallic lanthanoid assemblies, multifunctional materials with coexistence of magnetic/conducting properties and/or chirality and multifunctional metal-organic frameworks (MOFs) will be discussed herein. The influence of (i) the electronic nature of the X substituents and (ii) intermolecular interactions i.e., H-Bonding, Halogen-Bonding, π-π stacking and dipolar interactions, on the physical properties of the resulting material will be also highlighted. A combined structural/physical properties analysis will be reported to provide an effective tool for designing novel anilate-based supramolecular architectures showing improved and/or novel physical properties. The role of the molecular approach in this context is pointed out as well, since it enables the chemical design of the molecular building blocks being suitable for self-assembly to form supramolecular structures with the desired interactions and physical properties.Keywords: benzoquinone derivatives; molecular magnetism; multifunctional molecular materials; spin-crossover materials; metal-organic frameworks General IntroductionThe aim of the present work is to highlight the key role of anilates in engineering new materials with new or improved magnetic and/or conducting properties and new technological applications. Only homoleptic anilato-based molecular building blocks and related materials will be discussed. Selected examples of para-/ferri-/ferro-magnetic, spin-crossover and conducting/magnetic multifunctional materials and MOFs based on transition metal complexes of anilato-derivatives, on varying the substituents at the 3,6 positions of the anilato moiety, will be discussed herein, whose structural features or physical properties are peculiar and/or unusual with respect to analogous compounds reported in the literature up to now. Their most appealing technological applications will be also reported.

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“…Iron mixed-valence complex, (n- This complex also shows a ferromagnetic transition at 7 K with LTP spin state [1] [2].…”

Section: Introductionmentioning

confidence: 99%

Structural Analysis of Iron Mixed-Valence Complex (n-C₃H₇)₄N[Fe^IIFe^III(dto)₃] (dto = C₂O₂S₂) under High Pressure

et al. 2007

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Iron mixed-valence complex, (n-C 3 H 7 )4N[Fe II Fe III (dto) 3 ] shows an electron-transfer between Fe(II) and Fe(III) ion accompanied by a spin transition, i.e. a charge-transfer (CT) phase transition at 122.4 K. The pressure dependence of CT phase transition is evaluated by a x-ray structural analysis under high pressure. We report the structural changes of the CT transition under high pressure.

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Charge transfer phase transition and ferromagnetism in a mixed-valence iron complex, (n-C3H7)4N[FeIIFeIII(dto)3] (dto=C2O2S2)

Cited by 71 publications

References 12 publications

Calorimetric investigations of phase transitions in which electrons are directly involved

Calorimetric investigations of phase transitions in which electrons are directly involved

Recent Advances on Anilato-Based Molecular Materials with Magnetic and/or Conducting Properties

Structural Analysis of Iron Mixed-Valence Complex (n-C₃H₇)₄N[Fe^IIFe^III(dto)₃] (dto = C₂O₂S₂) under High Pressure

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Charge transfer phase transition and ferromagnetism in a mixed-valence iron complex, (n-C3H7)4N[FeIIFeIII(dto)3] (dto=C2O2S2)

Cited by 71 publications

References 12 publications

Calorimetric investigations of phase transitions in which electrons are directly involved

Calorimetric investigations of phase transitions in which electrons are directly involved

Recent Advances on Anilato-Based Molecular Materials with Magnetic and/or Conducting Properties

Structural Analysis of Iron Mixed-Valence Complex (n-C3H7)4N[FeIIFeIII(dto)3] (dto = C2O2S2) under High Pressure

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Structural Analysis of Iron Mixed-Valence Complex (n-C₃H₇)₄N[Fe^IIFe^III(dto)₃] (dto = C₂O₂S₂) under High Pressure