Crystal structures and Mössbauer spectra of mixed-valence dinuclear iron(II,III) complexes: detrapped valence states †

Manago, Teruaki; Hayami, Shinya; Oshio, Hiroki; Osaki, Susumu; Hasuyama, H.; Herber, Rolf H.; Maeda, Yonezo

doi:10.1039/a808069k

Cited by 23 publications

(17 citation statements)

References 47 publications

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“…A 10 mCi 57 Co source diffused into palladium foil was used. The spectra were fitted by a Lorentzian line shape using the software of IGOR Pro (WaveMetrics, Inc.) on a personal computer, and the velocity scales and isomer shifts were normalized to iron foil at room temperature 8…”

Section: Experimental Partmentioning

confidence: 99%

Charge/Discharge Properties of Organometallic Batteries Fabricated with Ferrocene–Containing Polymers

Tamura

Akutagawa

Satoh

et al. 2008

Macromol. Rapid Commun.

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A group of ferrocene‐containing polymers were synthesized from vinylferrocene, ethynylferrocene and 1,1′‐dibromoferrocene, and properties of the formed polymers were examined to clarify their potential as a new class of cathode‐active, charge‐storage materials for rechargeable batteries. Vinylferrocene polymerized with 2,2′‐azoisobutyronitrile (AIBN) to give a polymer with number‐average molecular weights of 2 200–5 100 g · mol−1 in 12–41% yields, while ethynylferrocene and 1,1′‐dibromoferrocene polymerized with Rh catalysts and by step‐growth mechanism, respectively, to provide insoluble polymers in 71–96% yields. The capacities of organometallic rechargeable cells fabricated with poly(vinylferrocene), poly(ethynylferrocene), and poly(ferrocene) reached 105, 105, and 95 Ah · kg−1, respectively. In particular, poly(vinylferrocene) displayed completely reversible charge/discharge processes featuring a constant voltage of around 3.5 V.magnified image

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Section: Experimental Partmentioning

confidence: 99%

Charge/Discharge Properties of Organometallic Batteries Fabricated with Ferrocene–Containing Polymers

Tamura

Akutagawa

Satoh

et al. 2008

Macromol. Rapid Commun.

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“…This unusual valence state of complex 1 is also reflected in the temperature dependence of 6 and A as shown in Figures 4a and 4b. Temperature dependence of 6 and A of complexes 2 and 3 exhibits typical behavior of valence trapped process between 80 K and 295 K. 16 The 6 of high-spin FeIII usually decrease with increasing temperature except for complexes which experience a phase transition in the temperature measured, but 6 of FeIII site in complex 1 increases with increase in temperature, and the A of high-spin FeIII are usually invariant with increase in temperature. However the A of complex I increase with increase in temperature.…”

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confidence: 99%

“…16 The Mossbauer spectra of complex 4 are shown in Figure 6. Compared to the Mossbauer spectra of complexes 1 -3, the spectra of complex 4 are considerably different.…”

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confidence: 99%

M^|^ouml;ssbauer Spectroscopy

Maeda¹

2006

J. Nucl. Radiochem. Sci.

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Mossbauer effect spectroscopy is one of the most important techniques for observing the dynamic phenomena of electronic states in solid. The Mossbauer spectra of mixed valence compounds show relaxation spectra if the electronic states are changed dynamically between Fe2+ and Fe3+. The dynamic electronic states of mixed valence compounds are discussed in connection with Mossbauer spectra of [Fe2(bpmp)(ppa)2]X2 as examples. The absorption spectra and cyclic voltammograms of the compounds were measured. The electronic states of the mixed compounds are dependent on the species of their anions in the solid state.

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“…57 Fe Mössbauer spectroscopy can help to determine whether iron atoms are Fe(II), Fe(III) [22][23][24][25] or mixedvalence [26][27][28][29][30][31][32][33][34][35]. The room-temperature Mössbauer powder spectrum of the sample (Fig.…”

Section: Fe Mössbauer Spectrometrymentioning

confidence: 99%

Solvothermal synthesis, structure and Mössbauer spectroscopy of a new mixed-valence iron aluminophosphate [FeII(H2O)2 Fe0.8IIIAl1.2(PO4)3]·H3O

Peng

et al. 2005

Comptes Rendus. Chimie

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Crystal structures and Mössbauer spectra of mixed-valence dinuclear iron(II,III) complexes: detrapped valence states †

Cited by 23 publications

References 47 publications

Charge/Discharge Properties of Organometallic Batteries Fabricated with Ferrocene–Containing Polymers

Charge/Discharge Properties of Organometallic Batteries Fabricated with Ferrocene–Containing Polymers

M^|^ouml;ssbauer Spectroscopy

Solvothermal synthesis, structure and Mössbauer spectroscopy of a new mixed-valence iron aluminophosphate [FeII(H2O)2 Fe0.8IIIAl1.2(PO4)3]·H3O

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