Water-Soluble Pillar[7]arene: Synthesis, pH-Controlled Complexation with Paraquat, and Application in Constructing Supramolecular Vesicles

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• 作者：Zhengtao Li ; Jie Yang ; Guocan Yu ; Jiuming He ; Zeper Abliz ; Feihe Huang
• 刊名：Organic Letters
• 出版年：2014
• 出版时间：April 4, 2014
• 年：2014
• 卷：16
• 期：7
• 页码：2066-2069
• 全文大小：287K
• 年卷期：v.16,no.7(April 4, 2014)
• ISSN：1523-7052

文摘

By the introduction of 14 anionic carboxylate groups at its two rims, a water-soluble pillar[7]arene (WP7) was synthesized. Its pH-controlled complexation with paraquat G₁ in water was investigated. Host WP7 and guest G₁ formed a 1:1 [2]pseudorotaxane with a high association constant of (2.96 卤 0.31) 脳 10⁹ M^鈥? in water. Furthermore, we took advantage of this novel molecular recognition motif to fabricate a supra-amphiphile based on WP7 and an amphiphilic paraquat derivative G₂. The morphologies and sizes of self-assemblies of G₂ and WP7G₂ were identified by transmission electron microscopy and dynamic light scattering.