Synthesis and near-infrared luminescence properties of ternary Nd(III) complexes-optical materials

Nd(bfa) 3 (TPPO) 2 , Nd(tta) 3 (TPPO) 2 and Nd(β-nta) 3 (TPPO) 2 (bfa: 4,4,4-Trifluoro-1-phenyl-1,3-butanedione, tta: 4,4,4-Trifluoro-1-(2-thienyl)-1,3-butanedione, β-nta: 4,4,4-Trifluoro-1-naphthyl-1,3-butanedione, TPPO: triphenylphosphine oxide), three kinds of Nd(III) ternary complexes, were synthesized using β-diketonates and triphenylphosphine oxide as ligands. Fluorescence properties (including excitation spectra, emission spectra , emission lifetime, quantum yield, etc.) and thermal stabilities of the complexes were studied. Nd(tta) 3 (TPPO) 2 having the sharpest emission band, highest relative emission intensity and shortest fluorescence lifetime shows that it will be a kind of promising material for applications in near infrared immunoassay, laser active medium and optical fibers .