Thermo-sensitive luminescent materials composed of Tb(Ⅲ)and Eu(Ⅲ) complexes

摘要

Thermo-stable lanthanide coordination polymers [Tb,Eu(hfa)_3(dpbp)]_n composed of Tb(Ⅲ) ion, Eu(Ⅲ) ion, bidentate phosphine oxide (dpbp: 4,4'-bis(diphenylphosphoryl)biphenyl), and low-vibrational frequency hexafluoroacetylacetonate (hfa) ligand are reported. The lanthanide coordination polymers [Tb,Eu(hfa)_3(dpbp)]_n (Tb/Eu=1, 10, 250, 500, and 750) are characterized by XRD, emission spectra and emission lifetime measurements. The energy transfer efficiencies among lanthanide ions are estimated using the emission lifetimes of solid-state coordination polymers. Characteristic emission properties of lanthanide coordination polymers composed of Tb(Ⅲ) ions and a small amount of Eu(Ⅲ) ions (Tb/Eu=750) have been observed for the first time. The energy transfer between lanthanide ions in coordination polymers is described in terms of solid-state materials.