Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 332-338 |
| Seitenumfang | 7 |
| Fachzeitschrift | Chemical papers |
| Jahrgang | 51 |
| Ausgabenummer | 6 |
| Publikationsstatus | Veröffentlicht - 1997 |
Abstract
The magnetic properties of a hexacoordinated Fe(II) complex with the bidentate ligand 2-(2-pyridyl)benzimidazole (pybzim) - [Fe(pybzim)3](ClO4)2 · H2O have been investigated by AC susceptometer measurements. The temperature dependence of the AC magnetic susceptibility for a powder sample showed essentially diamagnetic behaviour below 85 K and paramagnetism (μeff/μB = 4.5-5.3, S = 2) above 160 K, obeying the Curie - Weiss law. Spin crossover behaviour can be found within the temperature range of 90 to 160 K; it is centred at 141 K. The complex is ESR silent in X-band mode: neither the powder sample (77 K and 300 K) nor a methanol solution exhibit an ESR signal. The spin-crossover transition of a freshly prepared powder sample is complete. However, time evolution causes (within months) an increasing admixture of iron(III), which was proved by magnetic susceptibility measurement, ESR, and electron spectra of the complex.
ASJC Scopus Sachgebiete
- Biochemie, Genetik und Molekularbiologie (insg.)
- Biochemie
- Chemie (insg.)
- Chemische Verfahrenstechnik (insg.)
- Ingenieurwesen (insg.)
- Wirtschaftsingenieurwesen und Fertigungstechnik
- Werkstoffwissenschaften (insg.)
- Werkstoffchemie
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in: Chemical papers, Jahrgang 51, Nr. 6, 1997, S. 332-338.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Complete spin crossover in the [Fe(pybzim)3](ClO4)2 · H2O complex
AU - Dlháň, L.
AU - Linert, W.
AU - Renz, F.
AU - Boča, R.
PY - 1997
Y1 - 1997
N2 - The magnetic properties of a hexacoordinated Fe(II) complex with the bidentate ligand 2-(2-pyridyl)benzimidazole (pybzim) - [Fe(pybzim)3](ClO4)2 · H2O have been investigated by AC susceptometer measurements. The temperature dependence of the AC magnetic susceptibility for a powder sample showed essentially diamagnetic behaviour below 85 K and paramagnetism (μeff/μB = 4.5-5.3, S = 2) above 160 K, obeying the Curie - Weiss law. Spin crossover behaviour can be found within the temperature range of 90 to 160 K; it is centred at 141 K. The complex is ESR silent in X-band mode: neither the powder sample (77 K and 300 K) nor a methanol solution exhibit an ESR signal. The spin-crossover transition of a freshly prepared powder sample is complete. However, time evolution causes (within months) an increasing admixture of iron(III), which was proved by magnetic susceptibility measurement, ESR, and electron spectra of the complex.
AB - The magnetic properties of a hexacoordinated Fe(II) complex with the bidentate ligand 2-(2-pyridyl)benzimidazole (pybzim) - [Fe(pybzim)3](ClO4)2 · H2O have been investigated by AC susceptometer measurements. The temperature dependence of the AC magnetic susceptibility for a powder sample showed essentially diamagnetic behaviour below 85 K and paramagnetism (μeff/μB = 4.5-5.3, S = 2) above 160 K, obeying the Curie - Weiss law. Spin crossover behaviour can be found within the temperature range of 90 to 160 K; it is centred at 141 K. The complex is ESR silent in X-band mode: neither the powder sample (77 K and 300 K) nor a methanol solution exhibit an ESR signal. The spin-crossover transition of a freshly prepared powder sample is complete. However, time evolution causes (within months) an increasing admixture of iron(III), which was proved by magnetic susceptibility measurement, ESR, and electron spectra of the complex.
UR - http://www.scopus.com/inward/record.url?scp=0031498370&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0031498370
VL - 51
SP - 332
EP - 338
JO - Chemical papers
JF - Chemical papers
SN - 0366-6352
IS - 6
ER -