Luminous terbium and samarium complexes with diacetylmethane and substituted 1,10-phenanthroline derivatives for display applications: Preparation and optoelectronic investigations

Octacoordinated ternary heteroleptic lanthanide (Sm and Tb) complexes have been synthesized with diacetyl-methane (DAM) and substituted 1,10-phenanthroline auxiliary units. The synthesized complexes were thor-oughly characterized through electrochemical, thermal and spectroscopic studies. Photoluminescence emission spectral profiles have demonstrated green and orange-red emission due to the characteristic 5D4 -> 7F5 and 4G5/2 -> 6H9/2 transitions of Tb3+ and Sm3+ ions, respectively. Intensity ratio points out the asymmetric site around respective trivalent ion which leads to intense luminescence. The energy transfer mechanism has revealed the efficient sensitization of metal ions through organic ligand DAM. Photophysical and optical properties affirm the luminous and conducting behavior of synthesized complexes. These luminous lanthanide complexes could be utilized as emissive material in fabricating display devices.

Automated summary

Octacoordinated ternary heteroleptic lanthanide complexes with diacetyl-methane and substituted 1,10-phenanthroline auxiliary units were synthesized and thoroughly characterized. The complexes exhibited green and orange-red emission due to the transitions of Tb3+ and Sm3+ ions, respectively. The efficient sensitization of metal ions through the organic ligand DAM was observed. The synthesized complexes showed promising photophysical and optical properties, suggesting their potential applications as emissive materials in display devices.