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A Rare Octahedral Yb(III) Complex Exhibiting Field-Induced Single-Molecule Magnet Behavior
Georgia P Bakali1, Vipanchi2, Alexandros S Armenis1
1Department of Chemistry, University of Patras, Patras 26504, Greece.
ACS Omega
|February 9, 2026
Summary
This study reports a new Ytterbium-(III) complex exhibiting single-molecule magnetism. Theoretical calculations explain its magnetic relaxation, highlighting ligand contributions to anisotropy.
Area of Science:
- Coordination Chemistry
- Magnetochemistry
- Computational Chemistry
Background:
- Ytterbium-(III) complexes are of interest for molecular magnetism due to unique magnetic properties.
- Developing new complexes with single-molecule magnetism (SMM) behavior is crucial for advancing magnetic technologies.
Purpose of the Study:
- To synthesize and characterize a novel mononuclear Ytterbium-(III) complex.
- To investigate the magnetic properties and relaxation dynamics of the synthesized complex.
- To elucidate the factors governing magnetic anisotropy using theoretical calculations.
Main Methods:
- Synthesis and structural characterization of the Ytterbium-(III) complex [YbI2(OPPh3)4]-(I3).
- Magnetic susceptibility measurements to study magnetic behavior.
- Ab initio calculations and LoProp charge analysis to understand magnetic dynamics and anisotropy.
Main Results:
- A new six-coordinate Ytterbium-(III) complex with distorted octahedral geometry was synthesized.
- The complex exhibits field-induced single-molecule magnetism behavior with slow magnetic relaxation below 7 K.
- Theoretical studies indicate the dominance of the Raman mechanism and highlight the role of iodide ligands in enhancing magnetic anisotropy.
Conclusions:
- The synthesized Ytterbium-(III) complex demonstrates promising single-molecule magnetism properties.
- Ligand environment, particularly axial iodide ions, significantly influences magnetic anisotropy and crystal-field splitting.
- Computational methods effectively explain the observed magnetic relaxation dynamics.
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