Heterometallic lanthanide-centred [NiLn^III] rings

Area of Science:

• Coordination Chemistry
• Materials Science
• Magnetism

Background:

• Single-molecule magnets (SMMs) are crucial for developing high-density data storage and quantum computing.
• Designing novel molecular architectures with enhanced magnetic properties remains a significant challenge.

Purpose of the Study:

• To synthesize and characterize a novel heptanuclear metal complex with a unique {Ni6} ring structure.
• To investigate the magnetic properties, particularly the single-molecule magnet behavior, of the synthesized complex.
• To understand the influence of the central lanthanide ion on the magnetic properties.

Main Methods:

• Synthesis of a [NiII6DyIII] heptanuclear complex.
• Magnetic susceptibility measurements.
• Direct current (dc) and alternating current (ac) magnetic field studies.

Main Results:

• The complex exhibits a rare six-membered {NiII6} metal ring surrounding a central Dy(III) ion.
• Single-molecule magnet behavior was observed for the [NiII6DyIII] complex under zero external dc field.
• Replacing Dy(III) with Yb(III) or Gd(III) ions provided insights into the magnetic behavior.

Conclusions:

• The synthesized heptanuclear complex demonstrates promising single-molecule magnet behavior.
• The structural motif and the central lanthanide ion play critical roles in dictating the magnetic properties.
• This work contributes to the design principles for novel SMMs.