Novel terbium luminescent complexes with o-phosphorylated phenolate ligands

Lanthanide complexes with ortho-phosphorylated phenolate ligands LnL3 (Ln = Eu, Tb, Lu; HL1 = 2-di(p-tolyl)phosphorylphenol; HL2 = 2-diphenylphosphoryl-4-ethylphenol) were synthesized for the first time and characterized by elemental analysis, FTIR, 1H, 31P NMR spectroscopy, LDI-TOF mass-spectrometry. The energy gap between the triplet energy level and the corresponding resonance level of a lanthanide ion (5D1 for Eu3+ and 5D4 for Tb3+) is optimal for luminescence sensitization of only terbium ions. Bright green photo- and electroluminescence of terbium complexes was demonstrated.

The interaction between phosphorylated phenols (HL) and sodium hydroxide leads to formation of sodium phosphorylated phenolate (NaL). Reaction between sodium phosphorylated phenolate and inorganic salts of lanthanides (LnCl3·nH2O) leads to formation of lanthanide complexes LnL3.Figure optionsDownload as PowerPoint slideHighlights
► Lanthanide complexes of aromatic o-phosphorylated phenols were synthesized.
► Luminescent and volatility properties of lanthanide complexes were investigated.
► Thin film of terbium complex was tested as an active layer of OLED.