通过含有带状[4]pyrroles的器官凝选择分离化物
Hu Wang1, Leighton O Jones2, Inhong Hwang1
1Department of Chemistry, 105 East 24th Street, Stop A5300, The University of Texas at Austin, Austin, Texas 78712, United States.
Journal of the American Chemical Society
|November 23, 2021
概括
两种新的酸盐[4]pyrrole受体选择性地结合化 (LiCl) 与其他盐. 从这些受体获得的功能化凝有效地吸附和释放LiCl,显示了净化和回收的潜力.
科学领域:
- 超分子化学
- 材料科学
- 绿色化学
背景情况:
- 皇冠以太带体[4]是有效的离子识别主体.
- 选择性离子结合对于提取和回收等应用至关重要.
- 开发用于离子分离的可回收材料仍然是一个重大挑战.
研究的目的:
- 合成和描述具有选择性化 (LiCl) 结合潜力的新型功能化酸受体 (H1和H2).
- 从这些受体制成聚合物凝 (G1和G2),用于实际的LiCl吸附和释放.
- 评估这些凝的选择性和可回收性,以从混合盐溶液中分离LiCl.
主要方法:
- 在溶液中进行竞争性盐结合实验 (二-d5,二-d3).
- 密度函数理论 (DFT) 计算用于理论亲和力和选择性分析.
- 功能化受体与烯酸单体和交叉连接剂的共聚化,以形成聚合物凝.
- 使用混合盐溶液和溶剂极性切换 (乙/甲醇) 的吸附/脱附研究.
主要成果:
- H1和H2都显示了LiCl与NaCl,KCl,MgCl2和CaCl2的选择性结合.
- DFT计算支持实验结果,揭示了H1和H2对LiCl的特定亲和力和选择性.
- 由此产生的凝 (G1和G2) 从酸中的混合盐溶液中有效吸附LiCl.
- 然后将LiCl从凝中释放到甲醇中,并将凝回收用于重复使用.
- 溶剂极性切换被证实是驱动LiCl分离和回收的有效机制.
结论:
- 功能化的酸受体及其衍生的凝对LiCl具有很高的选择性.
- 开发的凝材料可回收,并通过溶剂极性切换有效分离LiCl.
- 这些发现为净化和回收应用提供了有前途的方法.
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