高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (4): 662.

• 论文 • 上一篇    下一篇

稀土-二苯甲酰甲烷、邻菲咯啉固态配合物及其掺杂硅胶共发光效应的光声光谱研究

杨跃涛, 张淑仪   

  1. 南京大学声学研究所, 近代声学国家重点实验室, 南京 210093
  • 收稿日期:2002-02-19 出版日期:2003-04-24 发布日期:2003-04-24
  • 通讯作者: 杨跃涛(1970年出生),男,副教授,理学博士,从事稀土化学和光声光谱研究.E-mail:yyang@nju.edu.cn E-mail:yyang@nju.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:10174038)

Photoacoustic Spectroscopy Study of the Co-luminescence Effect of Lanthanide-dibenzoylmethane, Phenanthroline Complex Powders and Their Doped Silica Gels

YANG Yue Tao, ZHANG Shu Yi   

  1. State Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China
  • Received:2002-02-19 Online:2003-04-24 Published:2003-04-24

摘要: 合成了Eu(Dbm)3·Phen同核和Eu0.8Ln0.2(Dbm)3·Phen(Ln:Er3+,Y3+)异核固体配合物微晶粉末及其掺杂的SiO2凝胶样品,在300~800nm范围内测定了其光声光谱.结果表明,配合物Eu0.8Er0.2(Dbm)3·Phen,Eu(Dbm)3·Phen和Eu0.8Y0.2(Dbm)3·Phen配体吸收处的光声强度依次减弱;而Eu0.8Y0.2(Dbm)3·Phen和Eu(Dbm)3·Phen配合物掺杂的凝胶则情况相反.研究发现,光声强度与稀土配合物分子中能量传递过程相关,Er3+,Y3+离子的引入改变了三元配合物的弛豫过程,且配合物在粉末状态和凝胶状态的弛豫历程不尽相同.结合荧光光谱,从无辐射跃迁和辐射跃迁的角度分析了标题化合物在两种不同固体状态下的发光性质.

关键词: 稀土配合物, 光声光谱, 硅胶, 共发光效应

Abstract: Eu(Dbm)3·Phen and Eu0.8 Ln0.2 (Dbm)3·Phen(Ln: Er3+, Y3+; Dbm: dibenzoylmethane; Phen: phenanthroline) complex powders and their doped silica gels have been prepared. Their photoacoustic(PA) spectra have been detected and interpreted for the first time. In the region of ligand absorption, the PA intensity decreases for Eu0.8 Er0.2(Dbm)3·Phen, Eu(Dbm)3·Phen and Eu0.8 Y0.2 (Dbm)3 ·Phen respectively. While for Eu(Dbm)3·Phen and Eu0.8 Y0.2 (Dbm)3·Phen doped silica gels, the reverse is true. It is found that the PA intensity bears a correlation with the energy transfer processes of the complexes. The additions of Er3+, Y 3+ ion change the relaxation processes of the complexes and the relaxation processes of ternary complexes are different in the two kinds of solid states. The changes of fluorescence spectra turn out to be complementary to the PA spectra. The luminescence properties of the complex powders and their doped silica gels are interpreted in depth from two aspects: nonradiative process and radiative process.

Key words: Lanthanide complex, Photoacoustic spectroscopy, Silica gel, Co luminescence effect

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