Strong Magnetic Coupling and Single-Molecule Magnet Behavior in Tetrazinyl Radical-Bridged Metallocenes.

ABSTRACT: Exchange coupling is essential in defining the magnetic behavior of polymetallic lanthanide-based (Ln^III) single-molecule magnets (SMMs), where, thanks to the unpaired electron(s), radical ligands show promise as magnetic bridges between the paramagnetic metal centers. Combining high-performance lanthanide metallocene [Cp*₂Ln]⁺ (Cp* = pentamethylcyclopentadienyl) units with the 3,6-bis(2-pyrimidyl)-1,2,4,5-tetrazine radical ligand (bmtz^•-) yielded two new radical-bridged dinuclear lanthanide metallocenes, [(Cp*₂Ln)₂(bmtz^•-)](BPh₄)·Solvent (Ln = Gd (1), Solvent = THF; Dy (2), Solvent = toluene). The strong magnetic exchange coupling of J_Gd-rad = -12.6 cm^-1 observed in 1, was probed via SQUID magnetometry as well as

SUBMITTER: Bajaj N 

PROVIDER: S-EPMC12271994 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature