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Polycationic‐Shelled Capsular and Tubular Nanostructures and Their Anionic–Guest Binding Properties
Author(s) -
Yazaki Kohei,
Sei Yoshihisa,
Akita Munetaka,
Yoshizawa Michito
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201604384
Subject(s) - cationic polymerization , capsule , bent molecular geometry , nanostructure , solubility , ligand (biochemistry) , chemistry , metal , materials science , shell (structure) , polymer chemistry , nanotechnology , chemical engineering , crystallography , organic chemistry , composite material , biochemistry , botany , receptor , engineering , biology
For the development of novel nanospace with unique electrostatic character, we prepared new capsular and tubular nanostructures by the quantitative assembly of metal ions and bent bisacridinium ligands. The capsule and tube have closed spherical and open cylindrical cavities, respectively, with diameters of around 1 nm surrounded by cationic polyaromatic panels. Thanks to the facile synthetic protocol (three steps), another polycationic capsule with an elliptical nanocavity was also prepared by using an elongated ligand. In spite of the absence of pendant hydrophilic groups, the spherical polyaromatic capsule shows sufficient water solubility due to the polycationic shell. Moreover, the highly cationic cavity (12+) can selectively encapsulate anionic organic compounds in water.