Size effects in the alkali metal ion-templated formation of oligo(ethylene glycol)-containing [2]catenanes

摘要

An investigation into the most suitable alkali metal ions for templating the assembly of [2]catenanes from di-, tri-, and tetra(ethylene glycol)-containing guest diamines and isophthalaldehyde has indicated that Na~+, K~+, and Rb~+ ions are optimal for preparing [2]catenanes containing at least one di(ethylene glycol) unit, two tri(ethytene glycol) units, and at least one tetra(ethylene glycol) unit [in the absence of a di(ethylene glycol) unit], respectively.