Self－assembly of Novel Hetero[3]rotaxane, [2]Rotaxanes and [2]Catenane

Self‐assembly of Novel Hetero[3]rotaxane, [2]Rotaxanes and [2]Catenane

One linear template 13 and one cyclophane template 15, both incorporating two electron rich 1,4‐dialkoxybenzene units and one diamide unit, have been synthesized. By utilizing donor‐acceptor interaction and/or intermolecular hydrogen bonding assembling principles, one novel hetero3]rotazane 22·4Cl, possessing one neutral and one tetracationic ring components, has been synthesized from 13, through neutral 2]rotaxane 21 as intermediate. With 15 as template, tetracationic 2]catenane 23·4PF₆ was assembled by using donor‐acceptor interaction, but no neutral 2]rotaxane could be obtained under the typical conditions of hydrogen bonding assembling principle. The interlocked supramolecular compounds have been characterized and their spectral properties are investigated.