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|Type:||Artigo de periódico|
|Title:||Synthesis and Photoluminescent Properties of Lanthanides Acetoacetanilide Complexes|
|Abstract:||This work reports on the photoluminescent properties of three new lanthanide complexes with acetoacetanilide (aaa), a beta-diketonate ligand. The complexes have the general molecular formulae [RE(aaa)(3)(H2O)], they are soluble in organic solvents such as ethanol and chloroform and insoluble in water. The energy of the triplet state was determined at about 4,700 cm(-1) higher than the D-5(4) emitting level of the Tb(III) ion, leading to an absolute quantum yield of 22 % for the [Tb(aaa)(3)(H2O)] complex. The photoluminescent properties were studied and the luminescence parameters of the [Eu(aaa)(3)(H2O)] complex were experimentally determined. The photostabilities of the complexes under continuous UV irradiation were measured and the data indicate low stability of the [Tb(aaa)(3)(H2O)] complex when the system is excited at the band attributed to energy transfer from the ligand to terbium(III) ion. However, its photostability is significantly improved under inert atmosphere.|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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