作者:Liangliang Zhu、Hong Yan、Xiao-Jun Wang、Yanli Zhao
DOI:10.1021/jo301807y
日期:2012.11.16
novel artificial molecular machines can be categorized as a currently important field of modern chemistry. In the present work, a novel photoresponsive [3]rotaxane containing two cucurbit[7]uril (CB[7]) rings and a dumbbell component consisting of one trans-azobenzene unit along with two viologen units was developed. Each viologen group was encircled by a CB[7] ring with a rapid shuttling equilibration
新型人工分子机器的设计和构建可以归类为现代化学的当前重要领域。在本工作中,开发了一种新型的光响应性[3]轮烷,其包含两个葫芦[7]尿素(CB [7])环和一个由一个反式偶氮苯单元和两个紫精单元组成的哑铃成分。每个紫精团都被一个CB [7]环所环绕,该环具有快速的穿梭平衡分布,延伸至位于哑铃组件中间的反式-偶氮苯单元。一旦反式-到-顺紫外光照射下偶氮苯单元的光异构化,观察到CB [7]环沿哑铃成分的穿梭限制。的大环化合物的哑铃部件上的平衡分布可通过该被回收的顺式-到-反式可见光照射下偶氮苯单元的光致异构化。这种可控制的穿梭过程已通过1 H NMR光谱进行了全面表征,并很容易通过[3]轮烷的荧光变化来表明。