Syntheses, Structures, and Magnetic and Luminescence Properties of a New Dy^III-Based Single-Ion Magnet

Three new Ln^III complexes based on 2,2′-bipyridine [Ln­(hfac)₃(bpy)] (Ln = Dy (<b>1</b>), Tb (<b>2</b>), or Ho (<b>3</b>); hfac = hexafluoroacetylacetonate; and bpy = 2,2′-bipyridine) have been synthesized and characterized structurally and magnetically. Single-crystal X-ray analysis shows that all these complexes contain one [Ln­(hfac)₃(bpy)] unit in which a center Ln^III ion is surrounded with a slightly distorted square-antiprismatic LnO₆N₂ coordination sphere formed by three bischelate hfac anions and one bpy ligand. Both static and dynamic magnetic properties were studied for complex <b>1</b>, which is proved to be a new single-ion magnet. The luminescence characterizations of complexes <b>1</b> and <b>2</b> are also studied in this paper