Synthesis and Metal-Complexation Ability of Cross-Linked Materials Containing Noria-Templated Cavities with Pendant Hydroxy Groups

Abstract

We synthesized Noria-containing cross-linked materials, Gel (Noria-VES-co-DM [n]), by radical polymerization of a Noria derivative with pendant styryl groups (Noria-VES) and α, ω-alkanedimethacrylamides (DM [n], n = 3, 6, 12) at feed ratios of Noria-MA/DM [n] = 1/24. Acid hydrolysis reaction of Gel (Noria-VES-co-DM [n]) (n = 3 and 6) could remove the Noria moieties to give corresponding cross-linked materials Gel (VES-co-DM [n]) (n = 3 and 6) containing Noria-templated cavities with pendant hydroxy groups. Examination of the inclusion-complex-forming ability using aqueous solutions of metal ions revealed that Gel (VES-co-DM [n]) (n = 3 and 6) had great absorption capacity, indicating that they indeed contain Noria-templated cavities that can accommodate metal ions in aqueous solution.