MAGNETIC SUPRAMOLECULAR GRID STRUCTURES: INTRAMOLECULAR COUPLING OF FOUR SEPARATE SPINS

摘要

The magnetization of novel tetranuclear supramolecular grid structures and their mononuclear analogues was measured. In the tetranuclear complexes with Co~(2+) or Ni~(2+) ions an intramolecular antiferromagnetic coupling of the four metal centers is observed. The isotropic coupling strength was determined to be J = -8 K for the Ni~(2+) grids, and J= -2 K for the Co~(2+) grids.