Highly Effective and Reversible Control of the Rocking Rates of Rotaxanes by Changes to the Size of Stimulus‐Responsive Ring Components
作者:Keiji Hirose、Kazuaki Ishibashi、Yoshinobu Shiba、Yasuko Doi、Yoshito Tobe
DOI:10.1002/chem.200800257
日期:2008.6.27
synthesized rotaxanes whose rates of rocking motion (pendular motion) were switched reversibly through changes to the size of the ring component in response to external stimuli. The ring molecules of the rotaxanes incorporate a metaphenylene unit, which swings like a pendulum, and a dianthrylethane unit, which undergoes reversible isomerization in response to photo- and thermal stimuli and changes the size
我们设计并合成了轮烷,其摇动运动(垂直运动)的速率通过响应外部刺激而改变环组件的大小而可逆地切换。轮烷的环分子包含一个像钟摆一样摆动的间亚苯基单元和一个响应于光和热刺激而经历可逆异构化并改变环组分尺寸的二蒽乙烷单元。摇动速率是通过可变温度(VT)NMR光谱法和饱和转移实验定量估算的,揭示了开环和闭环形式之间速率的显着变化,特别是在具有连接到亚苯基单元上的异丙氧基的轮烷的情况下。