结合组合与阳离子协调化学相遇:对/离子分离的框架形状和极性调整
Yi Xie1, Xiaojun Ding1, Jianchen Wang1
1Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, 100084, Beijing, China.
Angewandte Chemie (International ed. in English)
|October 25, 2023
概括
研究人员开发了新的混合框架,使用化离子来有效分离/. 这些材料具有很高的选择性和记录分离因子,这对于核燃料再加工应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 分离科学 分离科学
背景情况:
- 混合结 (H-bonded) 框架为特定的分离提供可调的相互作用.
- 充电元件和金属构造体是这些框架的关键构建块.
研究的目的:
- 为了探索单价化物离子 (F-, Cl-, Br-, I-) 与混合H键合成子的协调化学.
- 开发可控制的微孔H结合框架,用于/ (Xe/Kr) 分离.
- 为了微调框架表面极性,以实现适应性腔性能.
主要方法:
- 对化离子与H键合成子协调的系统研究.
- 构建坚固的,微孔的H结合框架.
- 使用IAST和动态列突破进行Xe/Kr分离的框架性能评估.
主要成果:
- 球形化物离子 (Cl-, Br-, I-) 很容易参与电荷辅助的H键组合.
- 由此产生的框架在1D孔道内具有开放的化离子.
- 激活的框架表现出偏好的 Xe 结合 (IAST Xe/Kr 选择性 ~10.5) 由于极化性和孔隙封闭.
- 在动态列中实现了Xe/Kr分离的记录分离因子 (SF=7.0).
结论:
- 单价化离子是有效的合成子,用于构建可调节的,微孔的H键框架.
- 开发的框架允许高效的Xe/Kr分离,即使在复杂的气体流中,如核燃料再加工中的气体流.
- 这项工作推动了对关键气体分离挑战的先进材料的设计.
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