Foldamers in pseudo[2]rotaxanes and [2]rotaxanes: tuning the switching kinetics and metastability
作者:Kang-Da Zhang、Xin Zhao、Gui-Tao Wang、Yi Liu、Ying Zhang、Hao-Jie Lu、Xi-Kui Jiang、Zhan-Ting Li
DOI:10.1016/j.tet.2011.10.116
日期:2012.6
pseudo[2]rotaxanes and [2]rotaxanes. By varying the number of the repeating units in the foldamer, the kinetics of the solvent-dependent slippage/deslippage of pseudo[2]rotaxanes and the switching of the ring between TTF and DNP of the [2]rotoxanes can be tuned remarkably, with the time scope ranging from several minutes to several days, in twelve solvents of varying polarity, which have been confirmed by the 1H NMR
氢键芳基酰胺折叠剂已引入可转换的拟[2]轮烷和[2]轮烷中,后者还包括环双百草枯(对苯撑)(CBPQT 4+)环和含有四硫富瓦烯(TTF)和1.5的“哑铃” -二氧萘(DNP,用于轮烷)。通过折叠和展开而改变的折叠器大小可作为空间手柄来调节CBPQT 4+的机械运动沿着假[2]轮烷和[2]轮烷的哑铃环。通过改变折叠剂中重复单元的数目,可以显着地调节假[2]轮烷的溶剂依赖性滑移/脱滑的动力学以及[2]轮烷的TTF和DNP之间的环的切换。在1 H NMR,UV-vis光谱法和循环伏安法实验中证实,在十二种极性不同的溶剂中,时间范围从几分钟到几天不等。