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  • Title: pH-Dependent phosphate separation using a tripodal hexaurea receptor.
    Author: Sun ZY, Chen SQ, Liang L, Zhao W, Yang XJ, Wu B.
    Journal: Chem Commun (Camb); 2023 Oct 26; 59(86):12923-12926. PubMed ID: 37823279.
    Abstract:
    We demonstrate that a tripodal hexaurea receptor can selectively bind PO43- anions via 12 hydrogen bonds with up to 3.8 × 106 M-1 binding affinity in DMSO, which is 38-fold stronger than SO42-. This receptor facilitates the extraction of PO43- from strongly basic aqueous solutions into chloroform using liquid-liquid extraction, followed by its release as the H2PO4- anion into an acidic solution. This pH-dependent phosphate extraction successfully enables selective separation of phosphate and sulfate anions.
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