SuFEx-Enabled Elastic Polysulfates for Efficient Removal of Radioactive Iodomethane and Polar Aprotic Organics through Weak Intermolecular Forces
Haibo Wan1, Qingfeng Xu1, Jiacheng Wu1, Cheng Lian2, Honglai Liu2, Bing Zhang3, Jinghui He1, Dongyun Chen1, and Jianmei Lu1,*（路建美）
1 College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123 (China)
2 School of Chemistry and Molecular Engineering, East China University of Science and Technology (China)
3 School of Renewable Energy, North China Electric Power University (China)
Angew. Chem. Int. Ed. 2022, e202208577
Capturing radioactive iodomethane and its vapors is a major challenge due to its low adsorption capacity. Herein, we have developed for the first time a pyridine-entrapped elastic crosslinked polysulfate gel (pyridine/TPC-cPS) as an efficient absorbent for iodomethane capture. Each pyridine-encased TPC-cPS network cell acts as a mini-reactor for salt formation between pyridine and iodomethane. The yield reaches up to 96.65 % and traps saturated iodomethane vapor of 1.573 g g(pyridine/TPC-cPS)(-1) (equivalent to 18.103 g g(TPC-cPS)(-1)), which is the highest capacity reported to date. Both experiments and molecular dynamics simulations reveal that the unusual adsorption of polysulfate for polar aprotic organics can be attributed to the fact that the electrostatic interactions between the polar group (O=S=O) in the polymer backbone and the polar groups in the organic molecules fixed the solvent in the polymer matrix, while the van der Waals forces between the nonpolar groups in the polymer and molecules induced swelling.
链接：//onlinelibrary.wiley.com/doi/10.1002/anie.202208577
