Improved Photoluminescence Properties of Ternary Terbium Complexes in Mesoporous Molecule Sieves

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• 作者：Suwen Li ; Hongwei Song ; Wenlian Li ; Xinguang Ren ; Shaozhe Lu ; Guohui Pan ; Libo Fan ; Hongquan Yu ; Hui Zhang ; Ruifei Qin ; QiLin Dai ; Tie Wang
• 刊名：Journal of Physical Chemistry B
• 出版年：2006
• 出版时间：November 23, 2006
• 年：2006
• 卷：110
• 期：46
• 页码：23164 - 23169
• 全文大小：197K
• 年卷期：v.110,no.46(November 23, 2006)
• ISSN：1520-5207

文摘

Ternary terbium complexes were fully encapsulated and uniformly distributed into the channels of unmodifiedand modified mesoporous molecule sieves of SBA-15 and characterized by transmission electron micrographs(TEM), Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-vis) absorption spectra,inductively coupled plasma-atomic emission spectroscopy (ICP-AES), and elemental analysis. The luminescentproperties for the encapsulated complexes were systematically studied in contrast to the pure complexes,including excitation and emission spectra, fluorescence dynamics, photostability under UV exposure, and thetemperature dependence of intensity and lifetime. The results indicate that the excitation bands assigned tothe -* electron transition of the ligands for Tb complexes encapsulated in SBA-15 were split into differentcomponents due to decreased symmetry and disappeared at long wavelengths. Owing to suppressed vibrationtransitions, the outer quantum efficiency of the ⁵D₄-⁷F_J (J = 0-5) emissions was enhanced largely in comparisonto the pure complexes. In addition, the photostability and thermostability of the emissions were also improvedconsiderably.