Field-Induced SMM and Vis/NIR Luminescence on Mononuclear Lanthanide Complexes with 9-Anthracenecarboxylate and 2,2′:6,2-Terpyridine

Five new mononuclear lanthanide complexes are synthesized by adding the several lanthanide nitrate hexahydrate salts, which for lanthanide (Ln) are Eu, Tb, Dy, Er, and Yb, with 9-anthracenecarboxylic acid (9-Hanthc) and 2,2 ':6,2 ''-terpyridine (TPY) in mixed solution of methanol and dimethylformamide (DMF). The general formula is [Eu(9-anthc)(3)(TPY)(DMF)]center dot H2O (1Eu) where Eu(III) is ennea-coordinated or [Ln(9-anthc)(3)(TPY)(H2O)]center dot H2O center dot DMF (Ln = Tb (2Tb), Dy (3Dy), Er (4Er), and Yb (5Yb)) where Ln(III) is octa-coordinated. For compounds 3Dy, 4Er, and 5Yb, the dynamic ac magnetic study indicated field-induced single molecule magnet (SMM) behavior. The photoluminescence studies in the solid state of these complexes show the sensitization of 4f-4f transitions for 4Er and 5Yb in the NIR region.

Automated summary

Five new mononuclear lanthanide complexes were synthesized by adding different lanthanide nitrate hexahydrate salts in a mixed solvent, exhibiting diverse coordination modes and properties, with some compounds showing field-induced single molecule magnet behavior and sensitized 4f-4f transitions in the near-infrared region in solid state photoluminescence studies.