A Rod-Packing Hydrogen-Bonded Organic Framework with Suitable Pore Confinement for Benchmark Ethane/Ethylene Separation
A Rod-Packing Hydrogen-Bonded Organic Framework with Suitable Pore Confinement for Benchmark Ethane/Ethylene Separation
复制标题
用于基准乙烷/乙烯分离的具有适当孔隙限制的棒填充氢键有机框架
DOI：
10.1002/anie.202100342
复制
发表时间：
2021-03-26
影响因子：
16.6
通讯作者：
Li, Bin
中科院分区：
文献类型：
--
作者：
Zhang, Xu;Wang, Jia-Xin;Li, Bin
对于乙烷与乙烯的分离，在C2 H6选择性材料中以高C2 H6吸附和选择性为目标仍然具有挑战性。在这里，我们报告了一个可逆的固态转换在一个不稳定的氢键键合的有机框架，以产生一个新的棒包装去溶剂化的框架（ZJU-HOF-1）具有合适的空腔空间和功能表面，以最佳地与C2 H6相互作用。因此，ZJU-HOF-1同时表现出高的C2 H6吸收（在0.5 bar和298 K下为88 cm（3）g（-1））和C2 H6/C2 H4选择性（2.25），这明显高于大多数性能最好的材料。理论计算表明，笼状空腔和功能位点协同“匹配”更好地与C2 H6提供更强的多点相互作用与C2 H6比C2 H4。结合其高稳定性和超低吸水率，该材料可以在60%RH的环境条件下从50/50 C2 H6/C2 H4混合物中有效捕获C2 H6，提供创纪录的聚合物级C2 H4生产率0.98 mmol g（-1）。
For the separation of ethane from ethylene, it remains challenging to target both high C2H6 adsorption and selectivity in a C2H6-selective material. Herein, we report a reversible solid-state transformation in a labile hydrogen-bonded organic framework to generate a new rod-packing desolvated framework (ZJU-HOF-1) with suitable cavity spaces and functional surfaces to optimally interact with C2H6. ZJU-HOF-1 thus exhibits simultaneously high C2H6 uptake (88 cm(3) g(-1) at 0.5 bar and 298 K) and C2H6/C2H4 selectivity (2.25), which are significantly higher than those of most top-performing materials. Theoretical calculations revealed that the cage-like cavities and functional sites synergistically "match" better with C2H6 to provide stronger multipoint interactions with C2H6 than C2H4. In combination with its high stability and ultralow water uptake, this material can efficiently capture C2H6 from 50/50 C2H6/C2H4 mixtures in ambient conditions under 60 % RH, providing a record polymer-grade C2H4 productivity of 0.98 mmol g(-1).