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<p>In this study, three aromatic amide-functionalized benzo-18-crown-6 (B18C6) derivatives (AmPh, AmPhOPh and AmPhtBu) were rationally synthesized via a three-step reaction route. The comprehensive extraction experiments were implemented to assess their extraction behaviors toward Cs(I). The influencing factors of contacting time, temperature, diluent, nitric acid concentration and concentration of extractant were analyzed in detail. Notably, the AmPhtBu derivative exhibited the prominent extraction ability and superior Cs(I) selectivity relative to the original B18C6. Furthermore, FT-IR and ESI-MS characterizations were utilized to elucidate the interaction mechanism and confirm the stoichiometry of extracted complexes. This research offers a feasible strategy for optimizing the structural design of B18C6 derivatives and improving the separation efficiency of Cs(I).</p>

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Synthesis of amide-functionalized B18C6 extractants and evaluation of their extractability toward Cs(I)

  • 期刊论文

  • 发表日期：

    2026年7月4日

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  • Yi-Jia Na,
  • Xu-Xin Li,
  • Wen-Jiang Yang,
  • Hong-Yi Wang,
  • Wei-Jia Wang,
  • Ze-Yu Ren,
  • Yujin Wang,
  • Ze-Yi Yan

摘要

In this study, three aromatic amide-functionalized benzo-18-crown-6 (B18C6) derivatives (AmPh, AmPhOPh and AmPhtBu) were rationally synthesized via a three-step reaction route. The comprehensive extraction experiments were implemented to assess their extraction behaviors toward Cs(I). The influencing factors of contacting time, temperature, diluent, nitric acid concentration and concentration of extractant were analyzed in detail. Notably, the AmPhtBu derivative exhibited the prominent extraction ability and superior Cs(I) selectivity relative to the original B18C6. Furthermore, FT-IR and ESI-MS characterizations were utilized to elucidate the interaction mechanism and confirm the stoichiometry of extracted complexes. This research offers a feasible strategy for optimizing the structural design of B18C6 derivatives and improving the separation efficiency of Cs(I).