中文摘要：

以2．5二甲氧基对苯二乙炔和3，6二碘-9-戊基咔唑为单体，采用Sonogashira偶合反应合成了含有咔唑基团的聚对苯撑乙炔基咔唑（P）．硝基苯衍生物对该聚合物的荧光淬灭实验结果表明，当对位取代基团不同时，取代基的推电子能力越强对聚合物P的淬灭效率越高；对相同取代基的淬灭剂而言，邻、对位取代时的淬灭效率明显高于问位取代化合物．淬灭剂是与P通过形成电荷转移络合物而使处于激发态的P分子链发生能量转移的，淬灭剂对P荧光的淬灭效率随其浓度的增大而非线性升高．

英文摘要：

Poly （2,5-dipentyloxyphenylene ethynylene carbazyl） （P） was synthesized with 2,5- dimethoxy-1,4-diethynylbenzene and 3, 6-diiodo-9-pentylcarbazole by Pd-catalyzed Sonogashira coupling reaction. The fluorescence quenched properties of P was influenced obviously by the structure and relative position of the substituting groups of nitrobenzene derivates. For the para- substituting nitrobenzene, the fluorescence quenching efficiency of quenchers increased with the increase of electron repulsion capability of the para-substituting group. And the fluorescence quenching efficiency reduced according to the sequence of o-NA, p-NA and m-NA under the same conditions due to the different electron withdrawing conjugated effect and inductive effect between amino- and nitro- group in nitroaniline isomers. Further study exhibits that the fluorescence quenching efficiency increases nonlinearly with the concentration of the quenchers.