Niu Zheng, Cui Xili, Pham Tony, Verma Gaurav, Lan Pui Ching, Shan Chuan, Xing Huabin, Forrest Katherine A, Suepaul Shanelle, Space Brian, Nafady Ayman, Al-Enizi Abdullah M, Ma Shengqian
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China.
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
Angew Chem Int Ed Engl. 2021 Mar 1;60(10):5283-5288. doi: 10.1002/anie.202016225. Epub 2021 Feb 4.
Porous materials with open metal sites have been investigated to separate various gas mixtures. However, open metal sites show the limitation in the separation of some challenging gas mixtures, such as C H /CO . Herein, we propose a new type of ultra-strong C H nano-trap based on multiple binding interactions to efficiently capture C H molecules and separate C H /CO mixture. The ultra-strong acetylene nano-trap shows a benchmark Q of 79.1 kJ mol for C H , a record high pure C H uptake of 2.54 mmol g at 1×10 bar, and the highest C H /CO selectivity (53.6), making it as a new benchmark material for the capture of C H and the separation of C H /CO . The locations of C H molecules within the MOF-based nanotrap have been visualized by the in situ single-crystal X-ray diffraction studies, which also identify the multiple binding sites accountable for the strong interactions with C H .
具有开放金属位点的多孔材料已被研究用于分离各种气体混合物。然而，开放金属位点在分离一些具有挑战性的气体混合物（如CH/CO）时表现出局限性。在此，我们基于多重结合相互作用提出了一种新型的超强CH纳米捕集器，以有效捕获CH分子并分离CH/CO混合物。这种超强乙炔纳米捕集器对CH的基准吸附热Q为79.1 kJ mol，在1×10 bar下纯CH的吸附量达到创纪录的2.54 mmol g，并且具有最高的CH/CO选择性（53.6），使其成为捕获CH和分离CH/CO的新型基准材料。通过原位单晶X射线衍射研究可视化了基于金属有机框架（MOF）的纳米捕集器中CH分子的位置，该研究还确定了与CH发生强相互作用的多个结合位点。
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