New family of 2D Coordination Polymers Based on 3d-4f 15-Metallacrown-5 Units: Synthesis, Structural and Single-Molecule Magnet Behavior

A new family of 2D coordination polymers based on 3d-4f 15-metallacrown-5 (MC) units were designed and characterized. The connection of the 15-metallacrown-5 subunits by the coordination of Cu-II and ligand led to the formation of 2D network of metallacrowns. Analysis of the magnetic properties of these coordination polymers reveals that the Gd-III (1), Tb-III (2), and Dy-III (3) complexes exhibit slow magnetic relaxation and under 1000 Oe dc field, and the Dy-III (3) complex exhibits single-molecule magnet behavior.