两状毛的圆盘,有分支的水友性尾巴和一个六次-四次-hexabenzocoronene核心
Myongsoo Lee1, Jung-Woo Kim, Sergiy Peleshanko
1Department of Chemistry, Yonsei University, Seoul 120-749, Korea. mslee@yonsei.ac.kr
Journal of the American Chemical Society
|August 1, 2002
概括
新型迪斯科分子自组装成高度有序的六角柱状液晶相,具有超过300°C的特殊热稳定性. 这种独特的结构促进了高效的能量传输,为先进的超分子材料铺平了道路.
科学领域:
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
- 液晶是一种液晶.
背景情况:
- 具有刚性芳香核的迪斯科分子,如hexabenzocoronene (HBC) 和hexabiphenylcoronene (HBCb) 是自组装功能材料的关键组成部分.
- 研究了Oligoether侧链,以影响分子包装和热性质.
- 了解自我组织对于开发具有定制电子和光学特性的材料至关重要.
研究的目的:
- 为了合成和表征新型的两性迪斯科分子与含水性性合物侧链.
- 调查这些分子在散装和接口上的自我组织行为和微观结构.
- 评估由此产生的超分子结构中的热稳定性和能量转移潜力.
主要方法:
- 盘状分子与HBC/HBCb核和六替代的橄树枝的合成.
- 使用适合液晶相和表面研究的技术进行微观结构的表征.
- 谱学研究以评估散装状态下的能量传递特性.
主要成果:
- 带有双分支的橄链的迪斯科分子自组织成有序的六边形柱状液晶相.
- 这些阶段在广泛的温度范围 (>300°C) 上表现出极好的热稳定性.
- 在接口处,分子形成有序域,具有独特的面对面包装安排.
结论:
- 大型刚性核心和无序的寡头尾巴的组合推动了高度有序的柱状结构的形成,增强了分子分离.
- 侧链中没有结晶对于长距离的柱状排序和强大的柱状内相关性至关重要.
- 由于近乎完美的柱状排序,这些材料显示出作为具有高能量传输效率的功能性超分子系统的潜力.
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