New gel-like polymers as selective weak-base anion exchangers

• Published in: PloS one Vol. 10; no. 5; p. e0122891
• Main Authors: Gierczyk, Błażej, Cegłowski, Michał, Zalas, Maciej
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 06.05.2015; Public Library of Science (PLoS)
• Subjects: Absorption, Physicochemical; Adsorption; Anion Exchange Resins - chemical synthesis; Anion Exchange Resins - chemistry; Anion exchanging; Anions; Binding sites; Chemical synthesis; Chemistry; Crosslinking; Epoxy Compounds - chemistry; Gels - chemistry; Hazardous materials; Hazardous substances; Innovations; Ion exchange; Ion exchangers; NMR; NMR spectroscopy; Nuclear magnetic resonance; Polyamines; Polyethylene Glycols - chemistry; Polymers; Potassium; Resins; Rhenium - chemistry; Selenic Acid - chemistry
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0122891

A group of new anion exchangers, based on polyamine podands and of excellent ion-binding capacity, were synthesized. The materials were obtained in reactions between various poly(ethyleneamines) with glycidyl derivatives of cyclotetrasiloxane. The final polymeric, strongly cross-linked materials form gel-like solids. Their structures and interactions with anions adsorbed were studied by spectroscopic methods (CP-MAS NMR, FR-IR, UV-Vis). The sorption isotherms and kinetic parameters were determined for 29 anions. Materials studied show high ion capacity and selectivity towards some important anions, e.g., selenate(VI) or perrhenate.