从可折叠的开放链到形状持久的宏循环:合成,对2D订单的影响和刺激自组装
Soobin Kim1, Henry D Castillo2, Milim Lee1
1Department of Chemistry , Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826 , Korea.
Journal of the American Chemical Society
|March 15, 2018
概括
我们设计了用于表面自组装的二三分子. 不同的分子结构和外围组精确地控制着有机膜的排序和对刺激的反应.
科学领域:
- 材料科学
- 超分子化学
- 有机电子
背景情况:
- 小分子自组是化学和电子应用中有序有机薄膜的关键.
- 对分子间相互作用的精确控制对于编程分子结构和功能至关重要.
- 基分子为表面自组合研究提供了可调的平台.
研究的目的:
- 设计和合成基于的新型 π 结合分子.
- 研究这些分子在表面上依赖结构的自我组装行为.
- 探索分子结构和外围群体对表面排序和对刺激的反应的影响.
主要方法:
- 使用后期C-C交叉合的二三二衍生物的合成.
- 扫描道显微镜 (STM) 用于分析表面上的分子自组.
- 对线性前体和循环化宏循环的比较研究,具有不同的外围组 (基与基乙烯糖醇).
主要成果:
- 基于分子骨干灵活性和外围群体化学观察到不同的自我组装行为.
- 基链促进了数字化结构,而基乙烯基醇 (OEG) 链导致了更密集的π核.
- 循环的宏观循环表现出比线性前体更快的自我组装动力,这是由于结构自由受到限制.
- STM尖端扰动和共溶剂显著影响了自组装动力学和表面图案.
结论:
- 分子设计,包括形状限制和外围组选择,可以精确控制表面的自组装.
- 溶液中的弱非共价相互作用可以被放大为2D表面上的受限分子,从而产生强大的排序.
- 这些发现为先进的有机材料和表面图案的分子相互作用提供了洞察力.
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