Back to Search
Start Over
Ising-type Magnetic Anisotropy and Slow Relaxation of the Magnetization in Four-Coordinate Amido-Pyridine Fe II Complexes.
- Source :
-
Inorganic chemistry [Inorg Chem] 2016 Nov 07; Vol. 55 (21), pp. 10968-10977. Date of Electronic Publication: 2016 Oct 26. - Publication Year :
- 2016
-
Abstract
- A family of four-coordinate Fe <superscript>II</superscript> complexes formed with N,N'-chelating amido-pyridine ligands was synthesized, and their magnetic properties were investigated. These distorted tetrahedral complexes exhibit significant magnetic anisotropy with zero-field splitting parameter D ranging between -17 and -12 cm <superscript>-1</superscript> . Ab initio calculations enabled identification of the structural factors that control the nature of the magnetic anisotropy and the rationalization of the variation of D in these complexes. It is shown that a reduced N-Fe-N angle involving the chelating nitrogen atoms of the ligands is at the origin of the negative D value and that the torsion between the two N-Fe-N planes imposed by steric hindrances further increases the |D| value. Field-induced slow relaxation of magnetization was observed for the three compounds, and a single-molecule magnet behavior with an energy barrier for magnetization flipping (U <subscript>eff</subscript> ) of 27 cm <superscript>-1</superscript> could be evidenced for one of them.
Details
- Language :
- English
- ISSN :
- 1520-510X
- Volume :
- 55
- Issue :
- 21
- Database :
- MEDLINE
- Journal :
- Inorganic chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 27783500
- Full Text :
- https://doi.org/10.1021/acs.inorgchem.6b01512