Syntheses,
Structures, and Magnetic and Luminescence
Properties of a New Dy<sup>III</sup>-Based Single-Ion Magnet
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Abstract
Three
new Ln<sup>III</sup> complexes based on 2,2′-bipyridine
[Ln(hfac)<sub>3</sub>(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)<sub>3</sub>(bpy)] unit
in which a center Ln<sup>III</sup> ion is surrounded with a slightly
distorted square-antiprismatic LnO<sub>6</sub>N<sub>2</sub> 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