pH-Dependent phosphate separation using a tripodal hexaurea receptor.
- Resource Type
- Article
- Authors
- Sun, Zhong-Yu; Chen, Si-Qi; Liang, Lin; Zhao, Wei; Yang, Xiao-Juan; Wu, Biao
- Source
- Chemical Communications. 11/7/2023, Vol. 59 Issue 86, p12923-12926. 4p.
- Subject
- *LIQUID-liquid extraction
*AQUEOUS solutions
*HYDROGEN bonding
*DIMETHYL sulfoxide
*ANIONS
*PHOSPHATES
*CHLOROFORM
- Language
- ISSN
- 1359-7345
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. [ABSTRACT FROM AUTHOR]