The electronic properties, rigidity, and planarity of conjugated polymers of the PEDOT type were tuned by changing the conjugated backbone from polythiophene to the more rigid polyselenophene and by replacing one or both oxygen atoms in the ethylenedioxy bridge (peripheral ring) with sulfur. While the band gaps of the obtained polyselenophenes are ∼1.4 eV, the orbital energy levels shift significantly because of changes in the electronic nature of the peripheral ring and the peak-width of the absorbance spectrum varies because of changes to backbone rigidity.
通过将共轭骨架从聚
噻吩改为更坚硬的聚
硒吩,以及用
硫取代乙二氧基桥(外围环)中的一个或两个氧原子,可以调整 PEDOT 型共轭聚合物的电子特性、刚性和平面度。虽然所得到的聚
硒吩的带隙为±1.4 eV,但由于外围环的电子性质发生了变化,轨道能级发生了显著的移动,而且由于骨架刚性的变化,吸收光谱的峰宽也发生了变化。