我们能把刚性聚合物/聚合物推向铁电性液晶的距离有多远?
Jinxing Li1,2, Runli Xia1, Hao Xu1
1South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou 510640, China.
Journal of the American Chemical Society
|October 18, 2021
概括
研究人员使用具有高双极时刻的延伸寡合体/聚合物合成了新型铁电阴性 (NF) 液晶. 从同位体液体中直接形成NF相,绕过传统的阴性相,为电光器件提供了新的可能性.
科学领域:
- 材料科学
- 液晶物理
- 有机化学
背景情况:
- 铁电阴性 (NF) 液晶表现出宏观的电极化,对于先进的电光器件至关重要.
- 之前的研究仅限于长度和双极时刻范围有限的小分子.
- 在聚合物和寡合物中NF阶段的潜力基本上尚未被探索.
研究的目的:
- 合成基于扩展的芳香棒状中晶体 (聚合物/聚合物) 的新型铁电阴性液晶.
- 研究分子长度增加和二极子时刻对NF阶段行为的影响.
- 探索这些新材料的相位过渡路径和包装结构.
主要方法:
- 精密合成重复单位高达12的寡合物/聚合物和单分散分子量.
- 使用偏光显微镜和其他相关技术对液晶相进行表征.
- 研究介电性质和非线性光学信号.
主要成果:
- 成功合成了超过30Debye的双极时刻的寡合物/聚合物.
- 在整个研究的寡合体/聚合物长度范围内观察到铁电阴性 (NF) 阶段.
- 发现了一种新型相位过渡途径,其中NF直接从同位素相中核化,抑制常规的阴性相.
- 识别了聚合物/聚合物棒的铁电包装.
结论:
- 铁电阴性 (NF) 阶段可以扩展到寡合体和聚合物.
- 这些材料表现出独特的相位行为和包装,为液晶聚合物科学提供了新的见解.
- 这些发现为开发具有增强性能的先进液晶电光设备铺平了道路.
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