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溶剂混合以诱导分子运动聚合成碗形粒子:底层机制,粒子性质和控制运动行为的应用
Linda E Franken1, Yuchen Wei2,3, Jiawen Chen2
1Electron Microscopy Group, Groningen Biomolecular Sciences and Biotechnology Institute , University of Groningen , Nijenborgh 7 , 9747 AG Groningen , The Netherlands.
Journal of the American Chemical Society
|June 8, 2018
概括
研究人员使用溶剂混合物制造了碗形颗粒, 而不是自组. 这种方法控制了分子运动功能,使先进的分子机器能够调节旋转运动和光切换发射.
科学领域:
- 超分子化学
- 材料科学
- 分子机器
背景情况:
- 对响应性材料和分子机器来说,对分子组件中的动态函数的控制至关重要.
- 了解限制如何影响分子行为是设计先进系统的关键.
研究的目的:
- 研究碗形粒子的形成及其对分子运动功能的影响.
- 探索溶剂混合物和封闭对分子电机的旋转运动的影响.
主要方法:
- 通过可控混合溶剂 (良好的溶剂和非溶剂) 形成碗形颗粒.
- 粒子结构和性质的表征 (液体内部,类似玻璃的外部).
- 使用光谱技术分析受限下的分子电机异构和旋转运动.
主要成果:
- 由于溶剂相互作用和玻璃过渡温度的变化,碗形颗粒独立于分子设计而形成.
- 在这些粒子中限制改变了分子电机的异构化行为和旋转运动.
- 分子电机表现出可光切换的聚合诱导的发射和受控的螺旋反转.
结论:
- 溶剂诱导的粒子形成为控制分子运动提供了一种新的策略.
- 封闭会对旋转运动产生很大的影响,使其可以调节向前和向后运动.
- 这种方法可以通过简单的调整溶剂比率和封闭来精确控制分子机器.
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