Lanthanoid single-ion magnets with the LnN10 coordination geometry

Area of Science:

• Coordination Chemistry
• Magnetism
• Materials Science

Background:

• Single-ion magnets (SIMs) are molecular materials exhibiting slow magnetic relaxation.
• Developing SIMs with high blocking temperatures is crucial for data storage and quantum computing.

Purpose of the Study:

• To synthesize and characterize novel homoatomic single-ion magnets.
• To investigate the magnetic properties and dynamic magnetic behavior of the synthesized compounds.

Main Methods:

• Synthesis of lanthanide complexes with pentadentate ligands.
• X-ray crystallography for structural determination.
• Dynamic magnetic susceptibility measurements to determine magnetic relaxation properties.

Main Results:

• Two unprecedented single-ion magnets with homoatomic LnN10 coordination geometry were reported.
• The central Ln (Ln = Dy(III) or Er(III)) ion is interlocked by two pentadentate ligands (N5).
• Effective energy barriers of 79(4) K for [Dy(N5)2](3+) and 59(4) K for [Er(N5)2](3+) were determined.

Conclusions:

• The synthesized Dy(III) and Er(III) complexes represent novel single-ion magnets.
• The low symmetry polyhedron and homoatomic coordination contribute to the observed magnetic properties.
• These findings advance the development of molecular magnetic materials.