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Liquid-crystalline pillar[5]arene-based [2]rotaxanes

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journal contribution
posted on 2023-11-20, 23:40 authored by Pauline Pieper, Yassine Chadi, Iwona Nierengarten, Uwe Hahn, Eric Meichsner, Thi Le Anh Nguyen, Joaquín Barberá, Robert Deschenaux, Jean-François Nierengarten

Liquid-crystalline mechanically interlocked molecules have been prepared from a clickable pillar[5]arene-containing [2]rotaxane building block incorporating ethynylated stoppers and dendritic mesogenic subunits of generation 0, 1 and 2 under copper-catalysed alkyne-azide cycloaddition conditions. The liquid-crystalline properties of the resulting pillar[5]arene-based rotaxanes bearing 4, 8 and 16 peripheral cyanobiphenyl units have been investigated and compared to those of corresponding model compounds lacking the macrocyclic component.


The Swiss National Science Foundation, the Jean-Marie Lehn Foundation, the Spanish Government (project PID2021-122882NB-I00 funded by MCIN/AEI/10.13039/501100011033/and by FEDER), and the Gobierno de Aragón/FEDER (research group E47-23 R) are gratefully acknowledged.