A series of new monomers (M1~M6) containing both thiophene and indole structures and carrying different substituents with varied electronic effects on the 2,3-position of indole have been designed and synthesized. The corresponding conjugated polymers (P1~P6) obtained via oxidative polymerization presented different spectral phenomena and fluorescence properties as well as fluorescence lifetime due to the synergistic influence of varied electronic effects, the interaction between polymer chains and π-π stacking of indole moieties. By adjusting the properties of substituents and their position in indole ring, these as-prepared conjugated polymers can emit fluorescence with varied colors such as blue-green, yellow, orange-red, brown red, light red and red, and show the changes of fluorescence intensity in different degrees with the increase of 365 nm UV irradiation time. Among them, P3 and P5 show much stronger fluorescence than other species, which is very desirable for application.

设计并合成了一系列同时具有噻吩和吲哚结构并带有不同取代基的新型单体（M1〜M6），这些取代基对吲哚的2,3-位具有不同的电子效应。相应的共轭聚合物（P1〜P6）通过由于各种电子效应，聚合物链之间的相互作用和吲哚部分的π-π堆积的协同影响，氧化聚合反应呈现出不同的光谱现象和荧光特性以及荧光寿命。通过调节取代基的性质及其在吲哚环中的位置，这些制备的共轭聚合物可以发出具有各种颜色的荧光，例如蓝绿色，黄色，橙红色，棕红色，浅红色和红色，并显示出变化。荧光强度随着365 nm紫外线照射时间的增加而不同程度地增加。其中，P3和P5显示出比其他物种强得多的荧光，这对于应用非常理想。