吸附
丙烷
微型多孔材料
选择性
化学
分子间力
金属有机骨架
材料科学
化学工程
纳米技术
分子
物理化学
有机化学
工程类
催化作用
作者
Wei Xia,Yisi Yang,Lianchao Sheng,Zhijie Zhou,Lihang Chen,Zhangjing Zhang,Zhiguo Zhang,Qiwei Yang,Qilong Ren,Zongbi Bao
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2024-01-19
卷期号:10 (3)
标识
DOI:10.1126/sciadv.adj6473
摘要
The electronics industry necessitates highly selective adsorption separation of hexafluoropropylene (C3F6) from perfluoropropane (C3F8), which poses a challenge due to their similar physiochemical properties. In this work, we present a microporous flexible-robust metal-organic framework (Ca-tcpb) with thermoregulatory gate opening, a rare phenomenon that allows tunable sieving of C3F8/C3F6. Remarkably, the temperature-dependent adsorption behavior enhances the discrimination between the larger C3F8 and the smaller C3F6, resulting in unprecedented C3F6/C3F8 selectivity (over 10,000) compared to other well-known porous materials at an optimal temperature (298 K). Dynamic breakthrough experiments demonstrate that high-purity C3F8 (over 99.999%) could be obtained from a C3F6/C3F8 (10:90) mixture under ambient conditions. The unique attributes of this material encompass exceptional adsorption selectivity, remarkable structural stability, and outstanding separation performance, positioning it as a highly promising candidate for C3F6/C3F8 separation. Single-crystal structural analysis of C3F6-loaded Ca-tcpb and theoretical calculations elucidate the host-guest interaction via multiple intermolecular interactions.
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