Abstract
The spin-crossover behaviors of mixed-valence iron compounds [Fe IIH3L][FeIIIL](NO3)2 (1) and [FeIIH3LMe][FeIIIL Me](NO3)2 (2) have been investigated by 57Fe Mössbauer spectroscopy, where H3L is a hexadentate N6 tripod ligand containing three imidazole groups and H3LMe is its 2-methylimidazole derivative. Deconvolution analyses of the Mössbauer spectra revealed that a two-step SCO (LS Fe II-LS FeIII→HS FeII-LS Fe III→HS FeII-HS FeIII) proceeds in each compound on elevating the temperature. Compound 2 exhibited lower spin-transition temperatures than 1. "Frozen-in effect" was observed below 120 and 50 K for 1 and 2, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 397-402 |
| Number of pages | 6 |
| Journal | Hyperfine Interactions |
| Volume | 166 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - Nov 2005 |
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Keywords
- Hydrogen bonds
- Iron complex
- Mixed-valence
- Mössbauer spectroscopy
- Spin-crossover
- Tripod ligand
- Two-dimensional structure
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
- Nuclear and High Energy Physics
Cite this
Mössbauer studies of mixed-valence spin-crossover iron complexes with a hexadentate tripod ligand. / Iijima, S.; Mizutani, F.; Niwa, O.; Matsumoto, N.; Sunatsuki, Yukinari; Kojima, M.
In: Hyperfine Interactions, Vol. 166, No. 1-4, 11.2005, p. 397-402.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Mössbauer studies of mixed-valence spin-crossover iron complexes with a hexadentate tripod ligand
AU - Iijima, S.
AU - Mizutani, F.
AU - Niwa, O.
AU - Matsumoto, N.
AU - Sunatsuki, Yukinari
AU - Kojima, M.
PY - 2005/11
Y1 - 2005/11
N2 - The spin-crossover behaviors of mixed-valence iron compounds [Fe IIH3L][FeIIIL](NO3)2 (1) and [FeIIH3LMe][FeIIIL Me](NO3)2 (2) have been investigated by 57Fe Mössbauer spectroscopy, where H3L is a hexadentate N6 tripod ligand containing three imidazole groups and H3LMe is its 2-methylimidazole derivative. Deconvolution analyses of the Mössbauer spectra revealed that a two-step SCO (LS Fe II-LS FeIII→HS FeII-LS Fe III→HS FeII-HS FeIII) proceeds in each compound on elevating the temperature. Compound 2 exhibited lower spin-transition temperatures than 1. "Frozen-in effect" was observed below 120 and 50 K for 1 and 2, respectively.
AB - The spin-crossover behaviors of mixed-valence iron compounds [Fe IIH3L][FeIIIL](NO3)2 (1) and [FeIIH3LMe][FeIIIL Me](NO3)2 (2) have been investigated by 57Fe Mössbauer spectroscopy, where H3L is a hexadentate N6 tripod ligand containing three imidazole groups and H3LMe is its 2-methylimidazole derivative. Deconvolution analyses of the Mössbauer spectra revealed that a two-step SCO (LS Fe II-LS FeIII→HS FeII-LS Fe III→HS FeII-HS FeIII) proceeds in each compound on elevating the temperature. Compound 2 exhibited lower spin-transition temperatures than 1. "Frozen-in effect" was observed below 120 and 50 K for 1 and 2, respectively.
KW - Hydrogen bonds
KW - Iron complex
KW - Mixed-valence
KW - Mössbauer spectroscopy
KW - Spin-crossover
KW - Tripod ligand
KW - Two-dimensional structure
UR - http://www.scopus.com/inward/record.url?scp=33845723616&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33845723616&partnerID=8YFLogxK
U2 - 10.1007/s10751-006-9299-0
DO - 10.1007/s10751-006-9299-0
M3 - Article
VL - 166
SP - 397
EP - 402
JO - Hyperfine Interaction
JF - Hyperfine Interaction
SN - 0304-3843
IS - 1-4
ER -