[Structure: see text] Protonation controls the location of a dual binding mode macrocycle in a [2]rotaxane. In the neutral form, amide-amide hydrogen bonds hold the macrocycle over a dipeptide residue; when the thread is protonated, polyether-ammonium cation interactions dominate and the macrocycle changes position.
质子化控制双结合模式大环在[2]轮烷中的位置。在中性形式下,酰胺-酰胺氢键将大环保持在二肽残基上。当线质子化时,聚醚-
铵阳离子相互作用占主导地位,大环改变位置。