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在二维表面限制的纳米孔状分子网络中的分子:结构,刚性和动态
Shengbin Lei1, Kazukuni Tahara, Xinliang Feng
1Department of Chemistry, Division of Molecular and Nanomaterials, Laboratory of Photochemistry and Spectroscopy, and Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 F, B-3001 Leuven, Belgium.
Journal of the American Chemical Society
|May 10, 2008
概括
六聚二三[12]烯 (DBA) 衍生物自组装成多孔或密集的图案. 纳米基因客体可以被纳入,形成新的多孔结构并展示动态的宿主-客体相互作用.
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
- 表面科学是一门学科.
背景情况:
- 六聚二三[12]烯 (DBA) 衍生物是能够自我组装的宏环化合物.
- 这些分子的排列受其氧链的长度的影响.
- 了解液体/固体界面的自我组装对于设计功能性材料至关重要.
研究的目的:
- 为了研究DBA衍生物的自我组装行为,具有不同的氧链长度.
- 探索DBA衍生品和纳米基因客体之间的相互作用.
- 了解由客分子诱导的结构转变.
主要方法:
- 使用扫描道显微镜 (STM) 可视化液体/固体界面的自我组装.
- 实验是在纳米基因客体的缺席和存在的情况下进行的.
- 系统地研究了DBA衍生物上不同长度的氧链.
主要成果:
- 带有短氧链的DBA衍生物形成了2D多孔的蜂巢图案.
- 具有较长的氧链的DBA衍生物形成了密集的线性图案.
- 纳米基因客体被纳入现有的多孔模式或诱导由密集模式形成新的多孔结构,多孔尺寸高达5.4纳米.
- 多达六个纳米基烯分子可以在DBA衍生物与OC20H41链的腔体中容纳.
- 主体矩阵表现出灵活性,因弱分子间相互作用而适应其结构以容纳客分子.
结论:
- DBA衍生品的自组装可通过氧链长度调节,从而产生明显的二维图案.
- 纳米基因客体可以模拟多孔结构的形成,并被积极纳入DBA矩阵.
- 观察到的动态过程凸显了这些超分子系统对宿主-客人化学的适应性.
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