用芳香色光体外修饰的多胺胺) 树突的光和聚合行为:树突架构的影响
Bing-Bing Wang1, Xin Zhang, Xin-Ru Jia
1Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Journal of the American Chemical Society
|November 19, 2004
概括
用光分子修改的体在水中自组装成粘合性,多层状结构. 囊泡大小和聚合取决于树枝状物生成,提供可调节的纳米材料.
科学领域:
- 超分子化学 超分子化学
- 纳米技术纳米技术
- 聚合物科学 聚合物科学
背景情况:
- 体是分支的宏分子,具有独特的架构.
- 树枝状体的外围修饰影响了它们的自我组装特性.
- 可以将光分子 (染色体) 纳入研究自我组装动态.
研究的目的:
- 为了研究光修饰的PAMAM树状体的自我组装行为.
- 探索树突生成对自组装聚合物的结构和特性的影响.
- 描述由此产生的囊泡结构及其相互作用.
主要方法:
- 用基,纳基,基和丹基染色体修改的PAMAM树突体 (G0-5) 的合成.
- 光谱法用于确定临界聚合度 (CAC).
- 传输电子显微镜 (TEM) 和原子力显微镜 (AFM) 用于结构分析.
- 光共振能量转移 (FRET) 用于确定相间厚度.
主要成果:
- 丹德里默 (G0-3) 在水中自组织成囊泡聚合物.
- 囊泡大小和聚合数量随着树突生成的增加而减少 (G0-3).
- 由于H-结合和分支纠,树枝囊泡表现出强大的粘附性.
- 观察到多胞体组合 ("双胞胎"",五胞胎") 和类似三角形的囊泡 (pyrenyl).
- 确定疏水性介相厚度为2.0-3.2 nm.
结论:
- 具有疏水性染色体的PAMAM树突体可以形成可调节的粘合性囊泡聚合物.
- 登德里默的生成显著影响自我组装和聚合物形态.
- 这些以树突分子为基础的囊泡代表了具有潜在应用的新型自组装纳米材料.
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