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相关概念视频

Structure of Amines01:19

Structure of Amines

The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’ carbon–carbon bond (154 pm). These aspects are illustrated in Figure...

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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
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在水中的诱导螺旋两聚 ((phenylacetylene) 内饰中,一种阿基拉染料的超分子螺旋组件.

Toyoharu Miyagawa1, Miho Yamamoto, Reiko Muraki

  • 1Yashima Super-structured Helix Project, Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST), 101 Creation Core Nagoya, 2266-22 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-0003, Japan.

Journal of the American Chemical Society
|March 9, 2007
PubMed
概括

状聚合物可以选择性地捕获水中的染料,从而创建螺旋结构. 在聚合物失去自身光学活性后,这种超分子性也可以被记住.

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科学领域:

  • 超分子化学 超分子化学
  • 聚合物科学 聚合物科学
  • 整形眼镜光谱法 整形眼镜光谱法

背景情况:

  • 具有aza-18-crown-6-ether悬挂的水溶性聚乙烯显示宿主-客人相互作用.
  • 在这些聚合物中,奇拉尔诱导导致水溶液中的单手螺旋结构.
  • 之前的研究表明,性氨基酸和氨基醇的螺旋式诱导.

研究的目的:

  • 通过诱导螺旋型聚合物来研究选择性捕获阿基拉色素染料.
  • 探索超分子螺旋聚合物的形成及其手术性质.
  • 为了检查诱导的超分子性质的记忆效应.

主要方法:

  • 用aza-18-crown-6-ether吊合成水溶性两性聚 ((phenylacetylene)) 的合成方法.
  • 使用氨基酸或氨基醇形成螺旋性聚合物.
  • 频谱分析,包括UV-Vis和诱导圆形二元化 (ICD),以研究染料复合和螺旋聚合.
  • 探究奇拉性记忆和热性种族化.

主要成果:

  • 诱导的螺旋式聚乙) 选择性地在酸性水中捕获了一种阿奇拉尔氧酸染料.
  • 在染料的染色体区域中形成表现为诱导循环二重化 (ICD) 的超分子螺旋聚合物.
  • 即使聚合物自身的螺旋结构丢失或倒置时,也记住了超分子性.
  • 螺旋式聚合物经历了缓慢的热竞赛化.

结论:

  • 诱导螺旋性聚合物可以作为模板,用于创建与非性客分子的性超分子组件.
  • 这项研究证明了在水性介质中模板导向的奇拉识别和聚合的机制.
  • 观察到的奇拉性记忆效应为开发先进的响应性材料提供了潜力.