Synthesis and characterization a novel europium(III)-β-diketonate complex with carbazole and triphenylamine moieties

A novel beta-diketonate ligand with triphenylamine and carbazole moieties named: 1-(4-diphenylamino-phenyl)-3-(9-ethyl-9H-carbazol-3-yl)-propane-1,3-dione (HL), was synthesized by the Claisen condensation reaction and its corresponding europium complex Eu(L)(3)phen was prepared. The structures of the ligand and complex were characterized by IR spectra, H-1 NMR, elemental analysis (EA), UV-Vis spectra and ESI-MS. The photoluminescence (PL) spectra shows that the ligand has an excellent antenna effect to sensitize the Eu3+ and the complex has good quantum efficiency which indicates that the complex is a good candidate as emitter in fabricating organic light-emitting diodes (OLEDs). Thermogravimetric (TG) analysis shows that the complex possesses high thermal stability and good film-forming ability to generate the OLEDs. (C) 2013 Elsevier B.V. All rights reserved.