Magnetic behaviour of a spin-canted asymmetric lanthanide quinolate trimer

Area of Science:

• Coordination Chemistry
• Magnetochemistry
• Quantum Magnetism

Background:

• Dysprosium complexes are investigated for single-molecule magnet (SMM) applications.
• Understanding magnetic interactions in polynuclear lanthanide complexes is crucial for designing advanced magnetic materials.

Purpose of the Study:

• To synthesize and characterize a novel asymmetrical dysprosium trimer.
• To investigate the magnetic properties and understand the underlying magnetic interactions in the synthesized complex.

Main Methods:

• Reflux reaction using Dy(NO3)3·nH2O and 8-quinolinoline.
• Magnetic susceptibility measurements.
• Sub-Kelvin magnetic measurements (μSQUID).
• Complete Active Space Self-Consistent Field (CASSCF) calculations.

Main Results:

• An asymmetrical dysprosium trimer, [Dy(hq)(hqH)(NO)(HO)], was successfully synthesized.
• The complex exhibits single-molecule magnet (SMM) behavior, confirmed by magnetic susceptibility and μSQUID studies.
• Intramolecular antiferromagnetic interactions and non-collinear spin arrangements (spin canting) were identified as key factors influencing the magnetic properties.

Conclusions:

• The synthesized dysprosium trimer displays SMM characteristics.
• Spin canting and intramolecular interactions are crucial for the observed non-trivial magnetic behavior in this SMM.
• The findings contribute to the rational design of lanthanide-based molecular magnets.