Abstract：Five solid complexes of phenyl-acetylmethylene sulfoxide(L) with light rare earth(La, Pr, Nd, Sm, Eu) were synthesized and characterized. Elemental analysis and molar conductivities show that the complexes have a composition of RE(ClO4)3·L5·2H2O; two ClO-4 anions coordinated with rare earth ions and the other did not. IR spectra suggested that the ligand coordinated with RE3+ by oxygen atom in sulfinyl group, and the oxygen atom in carbonyl group did not bond. The phosphorescence and 1H NMR and TG-DTA of the ligand and complexes were determind. Fluorescence spectra of Eu(Ⅲ) complex with the sulfoxide indicated that the complex has no symmetrical center. All the complexes have good solubility.
Key words：Phenyl-acetylmethylene sulfoxide;Light rare earth;Synthesis and characterization;Fluorescence
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