Formation of a series of stable pillar5arene-based pseudo1-rotaxanes and their 1rotaxanes in the crystal state

摘要

A series of mono-amide-functionalized pillar[5]arenes with different lengths of N-ω-aminoalkyl groups as the side chain on the rim were designed and synthesized, which all formed pseudo[1]rotaxanes in the crystal state. And these pseudo[1]rotaxanes could be transformed into [1]rotaxanes or open forms in the crystal state. In addition, they were also studied in solution by ¹H NMR spectroscopy.