Fluorinated β‐diketone‐based Sm(III) complexes: spectroscopic and optoelectronic characteristics

The synthesis and characterization of a series of octa‐coordinated Sm(III) complexes with 4,4,4‐trifluoro‐1‐(2‐naphthyl)‐1,3‐butanedione (TFNB) and 2,2′‐bipyridine (Bpy) derivatives as ancillary ligand are described here. The complexes were analyzed by elemental, spectroscopic such as infrared spectroscopy, 1H NMR, and thermogravimetric analyses. The fluorinated TFNB ligand absorbs in the range from 200 to 400 nm. The complexes show the sharp and structured Sm‐based emissions in visible region upon irradiation in UV range. Excitation spectra of complexes show similarity to the absorption spectra of ligands suggesting that excitation energy is transferred from ligands to Sm(III) centre by the antenna effect. Photoluminescence emission spectra and colour parameters affirmed that the complexes show luminescence in orange–red region. These luminous Sm(III) complexes might be applied as emissive layer in organic electroluminescent devices. A series of octa‐coordinated Sm(III) complexes with 4,4,4‐trifluoro‐1‐(2‐naphthyl)‐1,3‐butanedione (TFNB) and 2,2'‐bipyridine (Bpy) derivatives were synthesized. The bathochromic shift of absorption maxima is observed after complexation. The complexes show the sharp and structured Sm‐based emissions in the visible region upon irradiation in the UV range. Upon irradiating in the UV region, the complexes show luminescence, which specifies an effective intramolecular energy transfer to Sm3+ ion via antenna effect.