Removal of Anions from Aqueous Media by Means of a Thermoresponsive Calix[4]pyrrole Amphiphilic Polymer

Xiaofan Ji, Chenxing Guo, Wei Chen, Lingliang Long, Gengwu Zhang, Niveen M. Khashab, Jonathan L. Sessler

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

To address the challenge of removing unwanted anions from aqueous media under extraction-free conditions we have prepared a thermoresponsive amphiphilic polymer with pendent calix[4]pyrrole (C4P) receptors. Because of its amphipathicity, this polymer self-assembles into micelles in water. These micelles contain the C4P receptors buried in a hydrophobic core. This allows uptake of various cesium anions into the micelles. Due to the thermal- responsiveness of the hydrophilic block chain, the anion-bearing micelles precipitate in water upon heating. Simple filtration allows their removal from the aqueous environment, thus allowing for effective water purification. Treating the anion-trapped micelles with acidic aqueous solution leads to the competition-induced release of the bound anion and thus recycling the polymeric material.
Original languageEnglish (US)
Pages (from-to)15791-15795
Number of pages5
JournalChemistry - A European Journal
Volume24
Issue number59
DOIs
StatePublished - Sep 27 2018

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