Selective binding and detection of onium ions by lipophilic neutral cyclodextrins
Abstract
Lipophilic peroctylated α-, β- and γ-cyclodextrins exhibit good selectivity and cation discrimination in the binding of NH4+, NMe4+ and NEt4+ ions respectively; sensors based on peroctyl β-CD show excellent sensitivity and selectivity for NMe4+ over metal cations, and may be used for the selective detection of acetyl choline and cationic surfactants.