共 33 条
Synthesis and Photoluminescent Properties of Lanthanides Acetoacetanilide Complexes
被引:14
作者:
Souza, E. R.
[1
,2
]
Zulato, C. H. F.
[1
,2
]
Mazali, I. O.
[1
,2
]
Sigoli, F. A.
[1
,2
]
机构:
[1] Univ Campinas Unicamp, Lab Funct Mat Inst Chem, Campinas, SP, Brazil
[2] Univ Campinas Unicamp, Lab Funct Mat, Inst Chem, Campinas, SP, Brazil
基金:
巴西圣保罗研究基金会;
关键词:
Luminescence;
Beta-diketone complexes;
Terbium(III);
Europium(III);
ENERGY-TRANSFER;
LUMINESCENT PROPERTIES;
COORDINATION;
CRYSTAL;
EUROPIUM(III);
MECHANISMS;
LIGAND;
D O I:
10.1007/s10895-013-1219-5
中图分类号:
Q5 [生物化学];
学科分类号:
071010 ;
081704 ;
摘要:
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.
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页码:939 / 946
页数:8
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