在一个离子支柱框架中的静电电位匹配,用于从三级混合物中的基准六甲净化
Shuixiang Zou1,2, Wenjing Zhang1, Cheng Chen1
1State Key Lab of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China.
Angewandte Chemie (International ed. in English)
|April 8, 2025
概括
一个新的金属有机框架,SIFSIX-1-Cu,有效地将六乙烯 (CF3CF3) 与其他化气体分离. 这一突破使得半导体行业的高纯度CF3CF3生产能够使用单步过程.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 分离科学 分离科学
背景情况:
- 六乙 (CF3CF3) 在半导体制造中是必不可少的.
- 从CF3CH2F/CF3CHF2/CF3CF3等混合物中分离CF3CF3是具有挑战性的,因为它的惰性.
- 现有的多孔材料难以创建特定的识别点,以有效分离.
研究的目的:
- 开发一种新型材料,以高效地单步净化CF3CF3.
- 调查柱金属有机框架 (MOF) 用于分离化电子气体的使用.
- 为了实现CF3CH2F/CF3CHF2/CF3CF3混合物的基准分离性能.
主要方法:
- 使用了SIFSIX-1-Cu,一种具有双极孔的离子柱式MOF.
- 使用静电电位匹配用于选择性气体吸附.
- 使用CF3CH2F/CF3CHF2/CF3CF3混合物进行了一步突破性实验 (5/5/90).
- 进行理论计算以了解吸附机制.
主要成果:
- 在0.01bar时,SIFSIX-1-Cu显示了CF3CH2F和CF3CHF2的最高吸附能力.
- 获得了CF3CH2F/CF3CF3和CF3CHF2/CF3CF3.3的最高IAST选择性.
- 获得高纯度的CF3CF3 (≥99.995%) 与创纪录的生产率 (882.9 L kg-1).
- 理论计算证实了CF3CH2F和CF3CHF2通过多个超分子相互作用的强固定.
结论:
- 柱式MOF,特别是SIFSIX-1-Cu,对于分离化电子气体是有效的.
- SIFSIX-1-Cu独特的双极孔结构可以通过静电电位匹配进行选择性吸附.
- 这项工作在实现工业应用的高纯度CF3CF3生产方面取得了重大进展.
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