Abstract

Octacoordinated complexes of samarium were prepared with fluorinated diketone and bidentate N donor auxiliary ligands. These complexes were characterized by various spectroscopic techniques and thermo-gravimetric analyses. The spectral outcomes of all the complexes are reliable with the coordination of three TTA and one neutral unit to samarium ion via oxygen and nitrogen atom respectively. Energy band gap values (3–4 eV) support the conducting behavior of synthesized complexes. Photoluminescence spectra of ternary complexes illustrate the reddish orange emission at 648 nm (4G5/2→6H9/2) based on Sm3+ ion. Photoluminescence emission spectra and color coordinates suggest the luminous behavior of ternary samarium complexes. The singlet and triplet state energy of sensitizing ligands were calculated which point out towards the potential transfer of energy from sensitizing unit to the central ion. The photophysical parameters demonstrate that the complexes might be the promising candidate in displays and light emitting devices.

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