Synthesis, conformational and host–guest properties of water-soluble pillar[5]arene

Water-soluble pillar[5]arene was synthesized by the introduction of carboxylate anions at both upper and lower rims. When cationic viologen salt was mixed with the water-soluble pillar[5]arene in aqueous media, a very stable 1 ∶ 1 host–guest complex was formed.

通过在柱[5]芳烃（pillar[5]arene）的上下边缘引入羧酸根阴离子，可合成水溶性柱[5]芳烃（water-soluble pillar[5]arene）。将阳离子紫罗碱盐与该水溶性柱[5]芳烃置于水相介质中混合时，可形成稳定性极佳的1:1型主客体复合物（host–guest complex）。