Iron(II) Spin Transition Complexes with Dendritic Ligands, Part I

Autor:	Joachim Kusz, C. Matthias Grunert, Prashant Sonar, Yongli Wei, Philipp Gütlich, A. Dieter Schlüter
Rok vydání:	2008
Předmět:	Inorganic Chemistry Crystallography Thermogravimetric analysis Spin states Spin crossover Stereochemistry Chemistry Mössbauer spectroscopy Spin transition Spectroscopy Trifluoromethanesulfonate Magnetic susceptibility
Zdroj:	European Journal of Inorganic Chemistry. 2008:1613-1622
ISSN:	1099-0682 1434-1948
DOI:	10.1002/ejic.200700822
Popis:	The ligands G1- and G2-oligo (benzyl ether) (PBE) dendrons and their iron(II) complexes [Fe(Gn-PBE)3]A2·xH2O (with n = 1, 2 and A = triflate, tosylate) were prepared. The magnetic properties of the complexes were investigated by a SQUID magnetometer. All complexes exhibit gradual spin transition below room temperature. At very low temperatures the magnetic behaviour reflects zero-field splitting (ZFS) effects. 57Fe-Mossbauer spectroscopy was performed to distinguish between ZFS of high spin species and spin state conversion into the low spin state. Further characterisation was carried out by thermogravimetric analysis (TGA) and FT-IR spectroscopy. Structural features have been determined by powder XRD measurements.
Databáze:	OpenAIRE
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