Author:
Liu Huihui,Song Hongwei,Li Suwen,Ren Xinguang,Lu Shaozhe,Yu Hongquan,Pan Guohui,Zhang Hui,Hu Lanying,Dai Qilin,Qin Ruifei,Yu Jihong,Wang Guangmei,Jiang Jiuxing
Abstract
To modify the photoluminescence properties the Eu(DBM)3 bath complexes were encapsulated into the sub-nanometer pores of aluminosilicates zeolites L and Yand characterized by X-ray diffraction (XRD), transmission electron micrographs (TEM), Fourier transform infrared spectroscopy
(FTIR) and ultraviolet-visible (UV-vis) absorption spectra. The luminescent properties of the encapsulated composites (Eu-L and Eu-Y) were systematically studied. The results indicate that in both the two composites the crystal-field symmetry becomes lower, as a consequence, the 5D0-7F2
electronicdipole transition relative to the 5D0-7F1 magnetic-dipole transition of Eu3+ increases in contrast to the pure complexes. The outer quantum efficiency of the Eu3+ emission and the photostability of Eu3+
are both improved considerably. The adsorption of water in the composites has influence on the thermostability and decay dynamics of the Eu3+ emission. In the composite Eu-L, which contains less water the thermostability of luminescence is improved considerably and the lifetime
becomes longer in comparison to the pure complexes. Overall, zeolite L is a more ideal host material for modification of lanthanide complexes.
Publisher
American Scientific Publishers
Subject
Condensed Matter Physics,General Materials Science,Biomedical Engineering,General Chemistry,Bioengineering
Cited by
8 articles.
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