title: Water-soluble pillar[7]arene: synthesis, pH-controlled complexation with paraquat, and application in constructing supramolecular vesicles.
abstract: 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 ± 0.31) × 10(9) M(-1) 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 WP7⊃G2 were identified by transmission electron microscopy and dynamic light scattering.
authors.affiliation: State Key Laboratory of Chemical Engineering, Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China.
authors.forename: Zhengtao
authors.initials: Z
authors.lastname: Li
authors.forename: Jie
authors.initials: J
authors.lastname: Yang
authors.forename: Guocan
authors.initials: G
authors.lastname: Yu
authors.forename: Jiuming
authors.initials: J
authors.lastname: He
authors.forename: Zeper
authors.initials: Z
authors.lastname: Abliz
authors.forename: Feihe
authors.initials: F
authors.lastname: Huang
mesh_terms: D000838:Anions; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D046529:Microscopy, Electron, Transmission; D015394:Molecular Structure; D010269:Paraquat / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D012995:Solubility; D014867:Water / Q000737:chemistry*
chemical_list: D000838:Anions; D000644:Quaternary Ammonium Compounds; D014867:Water; D010269:Paraquat