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研究PPV／TiO2凝胶复合材料的光物理性质与结构的关系．采用溶胶-凝胶方法制备PPV／TiO2凝胶复合材料，利用FTIR光谱仪、UV－VIS光谱仪、荧光光谱仪及透射电镜对复合材料的结构和光物理性质进行表征．在复合材料中，随着TiO2凝胶的质量分数增加，TiO2凝胶网络结构形成，PPV的有效共轭链长变短，复合材料的光吸收、荧光发射蓝移，荧光强度增强．TiO2凝胶结构及PPV有效共轭链长控制着PPV／TiO2凝胶复合材料的光物理性质．
The relationship between photophysical properties and structure of PPV / TiO2 gel composites was studied. The PPV / TiO2 gel composite was prepared by sol-gel method. The structure and photophysical properties of the composites were characterized by FTIR spectroscopy, UV-VIS spectroscopy, fluorescence spectroscopy and transmission electron microscopy. In the composites, as the mass fraction of TiO2 gel increases, the structure of TiO2 gel network is formed, the effective conjugate chain length of PPV is shortened, the light absorption of the composite material, blue fluorescence shift and fluorescence intensity increase. The photophysical properties of PPV / TiO2 gel composites are controlled by the structure of TiO2 gel and the effective conjugated chain length of PPV.