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  

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

作　　者：杨跃涛[1] 张淑仪[1] 

机构地区：[1]南京大学声学研究所

出　　处：《高等学校化学学报》2003年第4期666-670,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :10 1740 38)

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 Si O2 凝胶样品 ,在 3 0 0～ 80 0 nm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 。Eu(Dbm) 3·Phen and Eu 0.8 Ln 0.2 (Dbm) 3·Phen(Ln: Er 3+ , Y 3+ ; 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 Eu 0.8 Er 0.2 (Dbm) 3·Phen, Eu(Dbm) 3·Phen and Eu 0.8 Y 0.2 (Dbm) 3 ·Phen respectively. While for Eu(Dbm) 3·Phen and Eu 0.8 Y 0.2 (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 Er 3+ , 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.

关 键 词：二苯甲酰甲烷 邻菲咯啉 固态配合物 掺杂 稀土配合物 光声光谱 硅胶 共发光效应 

分 类 号：O614.33[理学—无机化学] O482.31[理学—化学]