Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science & Technology, Shanghai 200237, PR China.
J Org Chem. 2013 Jan 18;78(2):590-6. doi: 10.1021/jo302426c. Epub 2012 Dec 28.
A [3]rotaxane with two [2]rotaxane arms bridged by an overcrowded alkene switch has been constructed to perform the clamlike motion in response to light stimulus. We demonstrated that this [3]rotaxane can undergo reversible conformational changes caused by the trans-cis isomerizations of the central double bond with a favorable photostationary state (up to 90% conversion). It has been shown that the clamlike motion causes remarkable UV-vis and fluorescence spectral changes, allowing it to behave as a reversible optical molecular switch.
一种由两个[2]轮烷臂桥接的[3]轮烷，其中间由一个拥挤的烯烃开关连接，已被构建为响应光刺激而执行蛤壳样运动。我们证明，这种[3]轮烷可以通过中央双键的顺反异构化进行可逆的构象变化，具有有利的光稳定状态（高达 90%的转化率）。已经表明，蛤壳样运动导致显著的紫外-可见和荧光光谱变化，使其能够作为一种可逆的光学分子开关。
