Abstract
Four luminescent ternary europium complexes of general formula Eu(PBD)3L were synthesized and characterized. Here, L represents auxiliary unit (2,2′-bipyridine and its derivatives) and PBD (1-phenyl-1,3-butanedione) is an organic chromophoric ligand. Elemental composition and complexation has been estimated by elemental and spectroscopic studies. Photoluminescence emission spectra clearly indicate the chromophoric nature of diketone ligand that has effectively sensitized the energized level of Eu3+ ion through antenna effect. The detailed photophysical parameters of the complexes were evaluated theoretically and experimentally. Theoretical parameters were estimated via LUMPAC software and their outcomes were found to be in good concurrence with experimentally derived data. Luminescence decay curve were recorded by monitoring the wavelength corresponding to hypersensitive 5D0→7F2 transition. Geometry of the complexes was resolved via Avogadro software. Colorimetric and photoluminescence spectral analyses suggest the red luminous nature of ternary europium complexes. These red emissive materials might be utilized in designing display devices.
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