Quantum Yield and Photoluminescence Intensity Enhancement Effects of a Diphosphine Dioxide Ligand on a 6-Coordinate Eu(III)-β-Diketonate Complex with Low Luminescence.

ABSTRACT: Tris{6,6,7,7,8,8,8-heptafluoro-1-[2-(9,9-dimethylfluorenyl)]-1,3-octanedionate} europium(III) (Eu(III)(hfod)₃ 1) was synthesized, which was designed to have low luminescence and a large absorption coefficient in order to elucidate the coordination effects of phosphine oxide ligands. The quantum yield (Φ_TOT) and photoluminescence intensity of complex 1 were dramatically enhanced by coordinating a diphenyl-4-(dibutylphosphinyl)butyl phosphine oxide (DPDB) ligand, thanks to the increased intrinsic photoluminescence quantum yield of the lanthanide (Φ_Ln) and the increased energy transfer efficiency (Φ_ET) in the solution and solid states. In the solid state, there was no energy dissipation by solvent molecules. This excluded the steric sh

SUBMITTER: Iwanaga H 

PROVIDER: S-EPMC7807766 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature