Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 4422-4429 |
| Seitenumfang | 8 |
| Fachzeitschrift | Chemistry - a European journal |
| Jahrgang | 9 |
| Ausgabenummer | 18 |
| Publikationsstatus | Veröffentlicht - 22 Sept. 2003 |
| Extern publiziert | Ja |
Abstract
The magnetism of a series of tetranuclear complexes of the [Fe II4L4](X)8 [2 × 2]-grid-type was investigated, revealing the occurrence of spin transition behavior within this class of compounds. The phenomenon depends directly on the nature of the substituent R1 in the 2-position on the central pyrimidine group of the ligand L. All FeII ions in compounds with R1 substituents favoring strong ligand fields (R1 = H; OH) remain completely in the diamagnetic low-spin state. Only complexes bearing R 1 substituents attenuating the ligand field by steric (and to a lesser extent electronic) effects (R1 = Me; Ph) exhibit spin transition behavior triggered by temperature. In general, gradual and incomplete transitions without hysteresis were observed for magnetically active complexes. The systems described provide approaches to the development of (supra)molecular spintronics.
ASJC Scopus Sachgebiete
- Chemische Verfahrenstechnik (insg.)
- Katalyse
- Chemie (insg.)
- Organische Chemie
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in: Chemistry - a European journal, Jahrgang 9, Nr. 18, 22.09.2003, S. 4422-4429.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Supramolecular spintronic devices
T2 - Spin transitions and magnetostructural correlations in [Fe4IIL4]8+ [2 × 2]-grid-type complexes
AU - Ruben, Mario
AU - Breuning, Esther
AU - Lehn, Jean Marie
AU - Ksenofontov, Vadim
AU - Renz, Franz
AU - Gütlich, Philip
AU - Vaughan, Gavin B.M.
PY - 2003/9/22
Y1 - 2003/9/22
N2 - The magnetism of a series of tetranuclear complexes of the [Fe II4L4](X)8 [2 × 2]-grid-type was investigated, revealing the occurrence of spin transition behavior within this class of compounds. The phenomenon depends directly on the nature of the substituent R1 in the 2-position on the central pyrimidine group of the ligand L. All FeII ions in compounds with R1 substituents favoring strong ligand fields (R1 = H; OH) remain completely in the diamagnetic low-spin state. Only complexes bearing R 1 substituents attenuating the ligand field by steric (and to a lesser extent electronic) effects (R1 = Me; Ph) exhibit spin transition behavior triggered by temperature. In general, gradual and incomplete transitions without hysteresis were observed for magnetically active complexes. The systems described provide approaches to the development of (supra)molecular spintronics.
AB - The magnetism of a series of tetranuclear complexes of the [Fe II4L4](X)8 [2 × 2]-grid-type was investigated, revealing the occurrence of spin transition behavior within this class of compounds. The phenomenon depends directly on the nature of the substituent R1 in the 2-position on the central pyrimidine group of the ligand L. All FeII ions in compounds with R1 substituents favoring strong ligand fields (R1 = H; OH) remain completely in the diamagnetic low-spin state. Only complexes bearing R 1 substituents attenuating the ligand field by steric (and to a lesser extent electronic) effects (R1 = Me; Ph) exhibit spin transition behavior triggered by temperature. In general, gradual and incomplete transitions without hysteresis were observed for magnetically active complexes. The systems described provide approaches to the development of (supra)molecular spintronics.
KW - Iron
KW - Magnetic susceptibility
KW - Mossbauer spectroscopy
KW - N ligands
KW - Spin transition
KW - Supramolecular chemistry
UR - http://www.scopus.com/inward/record.url?scp=0141645232&partnerID=8YFLogxK
U2 - 10.1002/chem.200304933
DO - 10.1002/chem.200304933
M3 - Article
C2 - 14502629
AN - SCOPUS:0141645232
VL - 9
SP - 4422
EP - 4429
JO - Chemistry - a European journal
JF - Chemistry - a European journal
SN - 0947-6539
IS - 18
ER -