6533b85dfe1ef96bd12bdbdf

RESEARCH PRODUCT

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

Joachim KuszJoachim KuszC. Matthias GrunertPrashant SonarYongli WeiPhilipp GütlichA. Dieter Schlüter

subject

Inorganic ChemistryCrystallographyThermogravimetric analysisSpin statesSpin crossoverStereochemistryChemistryMössbauer spectroscopySpin transitionSpectroscopyTrifluoromethanesulfonateMagnetic susceptibility

description

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.

yearjournalcountryeditionlanguage
2008-03-18European Journal of Inorganic Chemistry
https://doi.org/10.1002/ejic.200700822