一个分子宿主-客人复合体的光触发结晶
Guido H Clever1, Shohei Tashiro, Mitsuhiko Shionoya
1Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Journal of the American Chemical Society
|July 8, 2010
概括
研究人员展示了从金属有机中因光诱导的分子释放. 这种可逆的过程通过使用光来切换亚博客来控制分子机器,防止浪费,并使新材料形成.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 控制超分子组件的结构变化对于开发分子机器至关重要.
- 阿佐的可逆光异构化为使用光的外部输入提供了一种无浪费的方法.
研究的目的:
- 为了证明光触发的驱逐一个特定的亚博客从一个金属有机子.
- 为了研究这种光驱动的封装和释放过程的可逆性.
- 探索子溶解度对过程的影响.
主要方法:
- 使用一个由化联体和Pd (II) 离子组成的自组合金属有机子.
- 使用cis-4,4'-azobenzene bis-sulfonate作为一个可切换光的客.
- 将一种高度溶解的PEG化子衍生物与一种不太溶解的非替代子进行比较.
- 进行X射线结构分析以确认分子相互作用.
主要成果:
- 将cis-azobenzene客体与trans-isomer的光异构化触发了它从宿主-客体复合体中被驱逐出来的过程.
- 一种高度溶解的子衍生品显示了光驱封装/释放过程的完全可逆性.
- 不太溶解的子在客体光异构化后结晶,客体在外部与Pd (II) 中心结合.
结论:
- 这项研究成功地证明了通过阿佐烯光异构化通过金属有机的光控制的客体释放.
- 溶解度在光驱过程的可逆性和结果中起着至关重要的作用.
- 这项工作推动了对光有反应的分子机器和对刺激有反应的材料的开发.
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