Pseudo[2]rotaxane orientational isomers were formed in a stereocontrolled way by exploiting the electron-withdrawing (EW) or electron-donating (ED) effects of para-substituted dibenzylammonium axles threaded through the π-electron rich calixarene cavity, which allow the fine tuning of the weak π–π interactions.
C. Gaeta, C. Talotta and P. Neri, Chem. Commun., 2014, 50, 9917 DOI: 10.1039/C4CC04668D
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