一个单个分子系统,通过对铜的甲基二二胺连接体的环逆转来进行电子转移
Kuniharu Nomoto1, Shoko Kume, Hiroshi Nishihara
1Department of Chemistry, Graduate school of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Journal of the American Chemical Society
|March 4, 2009
概括
研究人员开发了一种使用铜复合体的新型电子转移门系统. 这个系统是由一个pyridylpyrimidine连接体的旋转运动控制的,使得基于温度的电子转移的开/关可以实现.
科学领域:
- 协调化学 协调化学
- 超分子化学 超分子化学
- 电化学 电化学 电化学
背景情况:
- 电子转移系统对于分子电子学至关重要.
- 动态控制电子转移是该领域的一个关键挑战.
- 分子旋转器为响应性关门机制提供了潜力.
研究的目的:
- 构建一个由分子旋转调节的电子转移门系统.
- 为了研究连接体动力学和氧化还原潜力之间的关系.
- 为了实现温度控制的电子转移的开/关开关.
主要方法:
- 一个铜复合物的合成与一个pyridylpyrimidine联结体.
- 使用溶液状态NMR光谱学的动态过程调查.
- 电化学测量以确定氧化还原电位转移.
主要成果:
- 一个铜复合体 (1.BF(4) 与一个旋转动态联体被成功合成.
- 皮里迪尔皮里米丁连接体表现出异构体相互转换,其屏障为73kJmol (-1) 在293K.
- 结合体构成的温度诱导的变化使铜中心的氧化还原潜力转移了 -0.14 V,封闭了电子传输.
结论:
- 这项研究展示了一种通过分子旋转控制的功能性电子转移门.
- 温度作为一种有效的外部刺激来调节关门行为.
- 这项工作为设计响应性分子电子设备提供了基础.
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相关概念视频
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01:26Thermal and Photochemical Electrocyclic Reactions: Overview
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01:17Thermal Electrocyclic Reactions: Stereochemistry
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Selection Rules: Thermal Activation
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03:02Colors and Magnetism
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