In this paper, the luminescent properties of three synthesis complexes of Ln (III) (Ln: Nd, Sm, Eu) with mixed l nds (s l l nd 2,2’-dipyridine-N-oxide) are described. The complexes correspond to their general formula of Ln(Sal)2(DipyO)(H2O)2 (Ln: Nd, Eu; Sal-: l l , D p O: 2,2’-dipyridine-N-oxide) and Sm(Sal)2(DipyO). The products were characterized by IR, thermal analysis, mass, and emission spectroscopy. The findings from IR spectroscopy suggested that complexes had been synthesized successfully, in which three of them consisted of neutral monomeric molecules. The thermal analysis indicated that they were all quite stable to heat. The luminescent spectra of the Eu(Sal)2(DipyO)(H2O)2displayed five bands arising from the 5D0 –7F2 dominant transition located at 614 nm, whereas the weaker 5D0 –7F1, 5D0 –7F4 transitions located at 592 and 700 nm, respectively. Notably, the weakest 5D0 –7F0, 5D0 –7F3 transitions were located at 579, 652 nm, respectively. The luminescent spectra of the Sm(Sal)2(DipyO) displayed three weak bands at 561, 598, and 645 nm, arising from 4G5/2 –6H5/2,4G5/2 –6H7/2,4G5/2 –6H9/2 transitions. These complexes demonstrated photoluminescence under UV light at room temperature.
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22,625,128
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