微妙的分子变化在很大程度上调节了Achiral结合聚合物的状螺旋组件,通过调整溶液-状态聚合
Kyung Sun Park1, Xuyi Luo2, Justin J Kwok3
1Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave., Urbana, Illinois 61801, United States.
ACS central science
|November 30, 2023
概括
研究人员探索了溶液中的合聚合物结构如何影响它们的等级组合和性特性. 他们发现,总体维度显著影响螺旋组件,为先进的性光电学铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 有机电子 有机电子
背景情况:
- 控制固体薄膜中合聚合物的多尺度形态和电子特性需要了解它们的溶液状态聚合物结构.
- 由于复杂的聚合行为,对这些溶液聚合物结构的详细理解,特别是它们的合组合,具有挑战性.
研究的目的:
- 为了研究阿基拉二基多罗罗四二烯 (DPP-T4) 共聚合物及其类似物 (DPP-T2M2,DPP-T2F2) 的溶液状态聚合物结构.
- 阐明这些聚合结构对等级性状螺旋组件的影响.
- 为了将总体维度与奇拉螺旋直径和光电子特性相关联.
主要方法:
- 小角度X射线散射 (SAXS) 分析.
- 微观溶液成像技术. 微观溶液成像技术.
- 合成和描述DPP-T4,DPP-T2M2和DPP-T2F2共聚物.
主要成果:
- 确定了不同的聚合物结构:DPP-T2F2形成了具有强大的内部结合的半晶1D纤维聚合物,DPP-T2M2形成了具有弱内部结合的半晶1D纤维聚合物,DPP-T4形成了高度晶的2D板聚合物.
- 这些聚合物在高度下形成了解热性形螺旋式液晶 (LC) 中相.
- 整体维度调节螺旋, 2D 片产生比 1D 纤维更大的度.
- 由于其有序的1D纤维聚合物和小的螺旋曲线,DPP-T2F2表现出0.09的高异构不对称系数 (g系数).
结论:
- 溶液聚合物的维度是控制合聚合物的层次性状螺旋组件的关键因素.
- 这种理解使得能够合理设计用于新兴的奇拉光电子的奇拉有机半导体.
- 这项研究提供了关于achiral有机半导体溶液状态层次和奇拉组件的重要见解.
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