Eu~(3+) Ion as Luminescent Probe:Eu~(3+) Sites in Eu(PBI)_3•phen and [Eu(PBI)_3 • C_2H_5OH • H_2O] • H_2O Complexes

摘要

The luminescence of Eu~(3+) in Eu(PBI)_3phen and [Eu(PBI)_3 • C_2H_5OH • H_2O] • H_2O (PBI: 3-phenyl-4-benzoyl isoxazate, phen: 1,10-phenanthroline) is reported. It is shown that the Eu~(3+) ions in Eu(PBI)_3phen are positioned on the two sites and the various lines are assigned to each site. However, Eu~(3+) ions occupy a single site in [Eu(PBI)_3 • C_2H_5OH • H_2O] • H_2O and the crystal field splittings of the ~7F_(1～4) levels are much larger than those in Eu(PBI)_3phen.