Luminescence Properties of Nd3+ and Yb3+ Complexes in Organic Solvents for Liquid Laser Medium

Perdeuterated hexafluoroacetylacetonato-neodymium [Nd (HFA-D) 3] and -ytterbium [Yb (HFA-D) 3] complexes were synthesized by the keto-enol tautomerism reaction of Nd (HFA-H) 3 and Yb (HFA-H) 3 in methanol-d4 in order to reduce the radiationless transition to the ligands. The luminescence properties of the Nd (HFA-D) 3 complex in organic solvents were analyzed by the Judd-Ofeltheory. The luminescence quantum yield of the Yb (HFA-D) 3 complex increased with the increasing coordination ability of the solvent molecules. The luminescence lifetime of the Yb (HFA-D) 3 complex in dimethylstilfoxide (DMSO-d6) which had the highest coordination ability was 66 μs.