title: Chromogenic benzo- and monoaza-12-crown-4, 13-crown-4 and 14-crown-4 lithium-selective crown ethers.
abstract: Chromogenic benzo-12-crown-4, benzo-13-crown-4 and benzo-14-crown-4 ethers have been compared with monoaza-12-crown-4 and monoazal-13-crown-4 ethers. Of these compounds, monoaza-13-crown-4 exhibited the best analytical characteristics toward the selective determination of lithium. K(ex)Li/K(ex)Na was 525 for the monoaza-crown-4 compound.
authors.affiliation: Department of Chemistry, Miami University, Oxford, Ohio 45056, U.S.A.
authors.forename: K
authors.initials: K
authors.lastname: Wilcox
authors.forename: G E
authors.initials: GE
authors.lastname: Pacey