摘要
用电化学方法制备的多孔阳极氧化铝具有孔径大小均匀、相互平行、排列规则的微孔结构 ,可作为多种发光材料的透明基底 .以多孔铝为载体 ,将有机染料嵌入多孔铝孔中 ,获得有机染料固体镶嵌膜 ,测量了镶嵌膜的吸收光谱、光致发光谱 .镶嵌膜的吸收光谱和液相染料的吸收光谱基本一致 ,光致发光谱的发光峰位蓝移 ,发光强度降低 ,但光谱线型更趋于对称 .实验结果表明染料以单体形式存在于多孔铝中 .通过对衬底多孔铝进行一系列后处理 。
The porous anodic alumina,formed by electrochemical oxidation of alumina,is characterized by fine,regular,almost cylindrical and parallelsided pores which can act as transparent host templates for a variety of luminescent media.Embedded the organic dyes in the pores in porous alumina,the embedded films are obtained.The photoluminescence and absorption spectra of the embedded dyes are measued and compared with those of the liquid dyes.It is found their absorption spectra are similar,while the photoluminescence spectra of the embedded films show a blue shift in the peak of the luminescence with the spectra more symmetric and the photoluminescence intensity decreased.It is also found that the organic dyes existing in the porous alumina are often in the form of monomers.After a series of post treatment on porous alumina before embedding the dyes in it,the photoluminescence intensity of the embedded dyes is found to be increased by heat treatment and increasing the porosity of porous alumina.
基金
山东省自然科学基金资助项目( No.Y98A10 0 13)~~
关键词
多孔铝
阳极氧化
有机染料
镶嵌膜
porous alumina
anodic oxidation
organic dyes
embedded films
