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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >A study of the fluorescence of some newly synthesized europium complexes with pyrazolone derivatives
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A study of the fluorescence of some newly synthesized europium complexes with pyrazolone derivatives

机译：一些新合成的吡唑酮衍生物euro配合物的荧光研究

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Some europium complexes with pyrazolone derivatives and 1,10-phenanthroline were synthesized and characterized. The europium ion was found to coordinate to O atoms of the pyrazolone derivatives and to N atoms of 1,10-phenanthroline. A strongly ligand-localized UV absorption leads to the europium-centered emissions between 580 and 750 nm which were assigned as the D-5(0) --> 7F(0,1,2,3,4) and D-5(1) --> F-7(3,4) transitions. A low site symmetry for the Eu3+ ion was confirmed from the observation of D-5(0) --> F-7(0) emission and from the splitting of the other bands. In contrast to many Eu complexes that have been investigated a rather weak emission was measured by introduction of a Schiff base to form a ternary complex with the pyrazolone derivative. The long fluorescence lifetimes of these complexes suggest an energy transfer process from ligands to Eu3+ ion through the triplet state of the ligands. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 22]
机译：合成了一些与吡唑啉酮衍生物和1,10-菲咯啉的配合物。发现离子与吡唑啉酮衍生物的O原子和1，10-菲咯啉的N原子配位。强烈的配体局部UV吸收导致中心发射在580 nm至750 nm之间，被指定为D-5（0）-> 7F（0,1,2,3,4）和D-5（ 1）-> F-7（3,4）转换。通过观察D-5（0）-> F-7（0）的发射以及其他谱带的分裂，证实Eu3 +离子的位点对称性低。与已研究的许多Eu络合物相反，通过引入席夫碱形成与吡唑啉酮衍生物的三元络合物，可测量到相当弱的发射。这些络合物的荧光寿命长，表明通过配体的三重态从配体到Eu3 +离子的能量转移过程。 （C）2000 Elsevier Science B.V.保留所有权利。 [参考：22]

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