中文摘要：

通过原位聚合法制备了聚（2,5-二丁氧基）对苯乙炔/多壁碳纳米管（PDBOPV/MWCNTs）复合材料.红外光谱和拉曼光谱证实了在MWCNTs表面的包覆层为PDBOPV.高分辨透射电子显微镜观察发现,PDBOPV/MWCNTs复合材料直径为35—45 nm,其中PDBOPV包覆层厚度约为15 nm.紫外—可见吸收光谱表明随着MWCNTs含量的增加,PDBOPV/MWCNTs的吸收发生红移且强度提高.荧光光谱研究表明随着MWCNTs含量的增加,PDBOPV/MWCNTs的最大发射波长发生蓝移且强度减小,MWCNTs与PDBOPV之间形成了光致电子转移体系,使得π电子离域程度增加,并且导致荧光量子效率降低.根据Eg与入射光子能量hν的关系,拟合了PDBOPV/MWCNTs薄膜的光学禁带宽度,发现随着MWCNTs的增加,Eg逐步减小.采用简并四波混频方法测试它们的三阶非线性极化率χ（3）,结果发现随着MWCNTs含量的增加,PDBOPV/MWCNTs复合体的非线性光学响应逐渐增强,这说明PDBOPV与MWCNTs之间形成了分子间光致电子转移体系,产生了复杂的分子间π-π电子非线性运动.

英文摘要：

The photoelectric composites of poly（2,5-dibutyloxy-1,4-phenylene vinylene）/ multi-walled carbon nanotubes（PDBOPV/MWCNTs） were prepared by in-situ polymerization.The results of Fourier transform infrared spectroscopy and Raman spectroscopy indicate that PDBOPV is coated on the surface of MWCNTs.The dimensions of the composite were observed by high resolution transmission electron microscopy,the diameter of PDBOPV/MWCNTs was measured to be about 35—45 nm,and the thickness of the coated PDBOPV is about 15 nm.The absorption of PDBOPV/MWCNTs is strengthened with the contents of MWCNTs increasing,and a red shift of the absorption peak can be clearly observed in the UV-Vis spectrum.Photoluminescence spectroscopy indicates that the maximum emission wavelength of the PDBOPV/MWCNTs is blue-shifted and intensity of photoluminescence decreases with increasing MWCNTs concentration.PDBOPV/MWCNTs show fluorescence quenching,which involves the inter-molecular photo-induced charge transfer process.Theoptical band gap of PDBOPV/MWCNTs decreases gradually with the contents of MWCNTs increasing.Third-order optical nonlinear susceptibility of PDBOPV/MWCNT composites were measured by degenerate four wave mixing.The results showed that the third-order nonlinear optical responses of PDBOPV/MWCNT composites were enhanced gradually when MWCNT content increased,which can be attributed to inter-molecular photo-induced electron transfer and π-π electron coupling between PDBOPV and MWCNTs.