Study of association of Eu(III) β -diketonato-1,10-phenanthroline complexes in silica-based hybrid materials

Energy Transfer in Mixed Lanthanides Complexes: Toward High‐Performance Pressure Sensors Based on the Luminescence Intensity Ratio

“…However, in a highly concentrated Tb 3+ or Eu 3+ system, the concentration quenching phenomenon must be carefully considered. [40,43,85] Dilution with optically neutral ions like Y 3+ could potentially enhance emission intensity by protecting the emitter from concentration quenching. [98] However, in the current complex, the decay time of Tb 3+ can still be accurately measured even at high Tb 3+ concentration (Figure 5a).…”

“…At low temperature, Eu 3+ electrons can be de-excited from the 7 F 2 or 7 F 1 to 7 F 0 , making ET pathways A or even B and C 2 impossible. At room temperature, the [Eu] and [Tb] complexes absorb energy from the organic ligand, as shown by a broad excitation band (405-420 nm) [28,85] at the top of Figure 3a & 3b, respectively. In the [Eu] complex, upon irradiation at 405 nm, electrons can be excited to level 5 L 6 , but there are no excited levels at this position for the [Tb] complex (Figure 2d).…”