Work

Unraveling cooperative interactions between complexed ions in dual-host strategy for cesium salt separation

Year: 2025

Type: article

Abstract: The dual-host strategy offers a straightforward approach to ion separation, yet the nature of cooperative interactions between receptor-complexed cations and anions remains poorly understood. In this study, we utilize [18] crown-6 ether as a cation receptor and a tripodal hexaurea receptor L as an anion receptor to extract cesium salts (chloride, nitrate, carbonate, sulfate, and phosphate) from the solid phase into chloroform. Remarkably, Cs3PO4 exhibits the highest extraction efficiency, driven by strong cooperative interactions involving ion-dipole coordination between Cs+ and carbonyl (C=O) groups, as well as direct ion-pairing interactions between [18] crown-6-complexed Cs+ and hexaurea-bound PO43–. Single-crystal structural analysis corroborates these interactions, shedding light on the underlying mechanisms and providing valuable guidance for the rational design of advanced dual-host systems for selective ion separation.

Source: Beilstein Journal of Organic Chemistry

DOI: 10.3762/bjoc.21.68

Authors: Zhihua Liu, Ya-Zhi Chen, Ji Wang, Qingling Nie, Wei Zhao, Biao Wu

Institution: Beijing Institute of Technology

Language: English

Topic: Supramolecular Chemistry and Complexes

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: diamond

Funders: National Natural Science Foundation of China, Beijing Institute of Technology

Award: G5687615446