Author/Authors :
Zhang، نويسنده , , Chuanju and Zhu، نويسنده , , Kelong and Li، نويسنده , , Shijun and Zhang، نويسنده , , Jinqiang and Wang، نويسنده , , Feng and Liu، نويسنده , , Ming and Li، نويسنده , , Ning and Huang، نويسنده , , Feihe، نويسنده ,
Abstract :
Pyrido-21-crown-7 (P21C7) has been synthesized and shown to form [2]pseudorotaxanes spontaneously with secondary dialkylammonium ions. These complexes are stronger than their benzo-21-crown-7 counterparts and much stronger than their dibenzo-24-crown-8 counterparts. Based on this new P21C7/secondary dialkylammonium salt recognition motif, a [2]rotaxane terminated by phenyl groups as stoppers has been successfully constructed using the threading-followed-by-stoppering technique.
Keywords :
Crown ether , Host–guest system , Secondary ammonium salt , Pseudrotaxane , rotaxane
