Perfluoroalkyl Chain Length Effect on Crystal Packing and [LnO8] Coordination Geometry in Lanthanide-Lithium β-Diketonates: Luminescence and Single-Ion Magnet Behavior

Functionalized perfluoroalkyl lithium beta-diketonates (LiL) react with lanthanide(III) salts (Ln = Eu, Gd, Tb, Dy) in methanol to give heterobimetallic Ln-Li complexes of general formula [(LnL(3))(LiL)(MeOH)]. The length of fluoroalkyl substituent in ligand was found to affect the crystal packing of complexes. Photoluminescent and magnetic properties of heterobimetallic beta-diketonates in the solid state are reported. The effect of the geometry of the [LnO(8)] coordination environment of heterometallic beta-diketonates on the luminescent properties (quantum yields, phosphorescence lifetimes for Eu, Tb, Dy complexes) and single-ion magnet behavior (U-eff for Dy complexes) is revealed.

Automated summary

Functionalized perfluoroalkyl lithium beta-diketonates (LiL) react with lanthanide(III) salts (Ln = Eu, Gd, Tb, Dy) in methanol to give heterobimetallic Ln-Li complexes. The crystal packing of the complexes is influenced by the length of fluoroalkyl substituent in the ligand. The photoluminescent and magnetic properties of the heterobimetallic beta-diketonates in the solid state are reported, along with the effect of coordination environment on their luminescent properties and single-ion magnet behavior.