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Type: Artigo de periódico
Title: Synthesis And Photoluminescent Properties Of Lanthanides Acetoacetanilide Complexes.
Author: Souza, E R
Zulato, C H F
Mazali, I O
Sigoli, F A
Abstract: This work reports on the photoluminescent properties of three new lanthanide complexes with acetoacetanilide (aaa), a β-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 (5)D4 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.
Subject: Acetanilides
Coordination Complexes
Lanthanoid Series Elements
Time Factors
Ultraviolet Rays
Citation: Journal Of Fluorescence. v. 23, n. 5, p. 939-46, 2013-Sep.
Rights: fechado
Identifier DOI: 10.1007/s10895-013-1219-5
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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