通过Calix直接提取氧化物[4]基于pyrrole的离子对受体
Inhong Hwang1, Sheng-Yin Huang1, Scott Smith1
1Department of Chemistry, The University of Texas at Austin, 105 East 24th Street, Stop A5300, Austin, Texas 78712-1224, United States.
Journal of the American Chemical Society
|June 21, 2023
概括
通过使用溶剂浸树脂 (SIRs) 有效提取氧化物 (NaOH). 这种方法可以防止沉,从而有效地去除NaOH并降低性溶液的pH和盐度.
科学领域:
- 超分子化学
- 分离科学
- 材料化学
背景情况:
- 选择性离子对受体的开发对于有效的化学分离至关重要.
- 卡利克斯[4]醇衍生物已被证明是用于离子识别的宿主分子.
- 应用这些受体进行大规模提取存在挑战,特别是在降水方面.
研究的目的:
- 为提取氧化物 (NaOH) 设计和合成新的基于醇[4]的离子对受体 (cis/trans-1和cis/trans-2).
- 研究溶液中的受体-NaOH复合物的结构和稳定性特征.
- 评估这些受体在液体液体提取 (LLE) 的效率,并探索克服沉问题的方法.
主要方法:
- 基于的[4]pyrrole受体 cis/trans-1 和 cis/trans-2 的合成
- 对cis-1·NaOH的结构阐明进行X射线衍射分析.
- 扩散顺序光谱 (DOSY) 和密度函数理论 (DFT) 的计算,以研究溶液相结构和石化计.
- 一开始的分子动力学 (AIMD) 模拟以评估复杂的稳定性.
- 液体液体提取 (LLE) 的实验.
- 通过溶剂浸将受体固定在聚乙烯树脂上,以产生溶剂浸树脂 (SIR).
主要成果:
- 通过X射线衍射证实了cis-1·NaOH的独特的二元超分子结构.
- DOSY,DFT和AIMD支持二元结构及其在溶液中的稳定性.
- 在LLE中,cis-和trans-2受体获得了50-60%的提取效率,但导致了沉.
- 使用SIR的固定成功消除了沉,同时保持了高的NaOH提取效率.
结论:
- 基于Calix[4]pyrrole的受体对NaOH提取具有有效的离子对识别.
- 溶剂浸树脂 (SIR) 提供了一种可行的策略,以克服受体介导提取中的沉限制.
- 开发的SIR提供了一种降低性水相pH和盐度的实用方法.
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