A Twin-Axial Hetero[7]rotaxane

摘要

Rotaxanes are challenging and interesting because of their potential applications in nanotechnology and molecular machines. Template synthesis has been widely used to realize more efficient synthesis of rotaxanes, while various protocols have been reported such as the popular "threading followed by stoppering", "slippage", and "clipping" approaches. However, the synthesis of high-order rotaxanes still remains a challenge. In this respect, it is very difficult to obtain heterorotaxanes with two or more similar rings, as well as [n]rotaxanes with more than one axle molecule threaded through the same ring.