在以光为燃料的人工分子组件中,相对单向的翻译
Hao Li1, Chuyang Cheng, Paul R McGonigal
1Department of Chemistry, ‡Department of Chemistry and Argonne-Northwestern Solar Energy Research Center, and §Department of Materials Science and Engineering, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States.
Journal of the American Chemical Society
|November 1, 2013
概括
研究人员开发了一种合成分子系统,使用化学试剂,电力或光线单向移动. 这种受控的运动依赖于可逆的非对应相互作用,只能通过可见光供电.
科学领域:
- 超分子化学 超分子化学
- 分子机器分子机器
- 纳米技术 纳米技术
背景情况:
- 大自然利用运动分子将能量转化为定向运动,这对于生物过程至关重要.
- 控制分子组件的运动和方向性是先进技术应用的关键.
- 模仿自然运动功能的合成系统非常受欢迎.
研究的目的:
- 设计和演示一种能够进行单向转换运动的合成小分子系统.
- 通过使用各种刺激来研究这种运动的控制机制.
- 探索这种分子系统在光驱动下运行的潜力.
主要方法:
- 采用了一种结构不对称的子元件和一个cyclobi{paraquat-p-phenylene}环.
- 操纵了环的氧化还原状态,以改变动力障碍和结合亲和力.
- 采用光谱方法 (1H NMR,UV/vis),循环电压测量和DFT计算用于表征.
- 性能与对称的伪托克桑对照剂进行比较.
主要成果:
- 在化学,电气或光刺激下,证明了分子系统的单向相对转换运动.
- 展示了改变环的氧化还原状态可以控制其与子末端的相互作用.
- 通过可逆的非对应性结合,确认了单向 [2] 伪多托克桑的形成和解离.
- 使用可见光和光敏感剂实现光驱动操作,没有副产品积累.
结论:
- 一个完全合成的分子系统表现出受控的单向运动已经成功开发.
- 该系统的运行依赖于可调节的,可逆的非共价相互作用.
- 可见光可以作为推动分子翻译的可持续能源,使可重复循环成为可能.
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