the materials. Grazing incidence wide-angle X-ray scattering of the thiophene-selenophene copolymers indicated that the π-stacking distance increased with incorporation of the larger heteroatom (from ∼3.7-4.0 Å), while the lamellar spacing decreased (from ∼15.8-15.2 Å). The study also revealed that periodic sequences allow electronic properties to be tuned while retaining nanofibrillar morphologies
16 族杂环(
呋喃、
噻吩和
硒吩)的周期性 π 共轭聚合物使用催化剂转移缩聚反应合成,其链长可控,分散性相对较低。这些共聚物的光学间隙和氧化还原电位通过改变杂环序列进行微调,原子力显微镜揭示了所有材料的纳米纤维形态。
噻吩-
硒吩共聚物的掠入射广角 X 射线散射表明,随着较大杂原子的掺入(约 3.7-4.0 Å),π 堆积距离增加,而层状间距减小(约 15.8-15.2 Å) )。该研究还表明,周期性序列允许调整电子特性,同时保留类似于聚(
3-己基噻吩)观察到的纳米原纤维形态。