Jw. Park et al., Molecular recognition of organic ammonium ions by diaza-crown ether-modified beta-cyclodextrin in aqueous media, CHEM LETT, (6), 2000, pp. 594-595
beta-Cyclodextrin (beta-CD) functionalized with diaza-18-crown-6 at primary
face shows 7-10 fold greater binding constants for aromatic ammonium ions
in aqueous media than the unmodified beta-CD by the cooperative binding of
the aromatic group to beta-CD and ammonium group to crown ether moiety.