Premium
Macrocyclic Pyridone Pentamers for Highly Selective High‐Capacity Removal of Caesium Ions from Radioactive High‐Salinity Waste
Author(s) -
Ye Ruijuan,
Jiang ChunXiao,
Yuan Lin,
Li Zhongyan,
Hu JinFeng,
Zeng Huaqiang
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202001098
Subject(s) - caesium , ion , chemistry , extraction (chemistry) , metal ions in aqueous solution , selectivity , molecule , inorganic chemistry , organic chemistry , catalysis
We report here that macrocyclic H‐bonded pyridone pentamers, containing five properly and convergently spaced electron‐rich O‐atoms that decorate a rigid cavity of 2.85 Å across, exhibit an extraordinarily high yet pH‐independent capacity and selectivity in Cs + removal. In particular, with [host]=240 μM and [Cs + ]=15 μM, a single extraction efficiently removes more than 91% of Cs + ions from artificial sea water, containing various competitive metal ions at a total concentration of 0.68 M ([total M n+ ]/[Cs + ]=4.5×10 4 ]). To our best knowledge, these pyridone pentamers represent the best small organic molecule‐based extractants that target Cs + ions.