C2H2/C2H4和C2H2/CO2高效分离的基准C2H2存储密度含金属氢键有机骨架

IF 16.9 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Jiali Fu,Qingxue Hui,Yu-Hao Gu,Qi Ding,Haoning Xu,Biao Yang,Chengyu Huangfu,Qingqing Wang,Xin-Li Liu,Xin-Yi Wang,Youting Wu,Xingbang Hu,Shuai Yuan,Zhaoqiang Zhang
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引用次数: 0

摘要

利用多功能多孔材料的高效吸附技术从工业上重要的气体对中分离C2H2仍然是一个重要但具有挑战性的问题。在这里,我们报道了C2H2/CO2和C2H2/C2H4混合物与等结构含金属氢键有机框架(M-HOFs)的高效分离,其特征是微孔通道被高密度和非配位羧基修饰。单晶x射线衍射分析表明,每个游离羧基都能通过氢键捕获一个C2H2分子。这使得m- hof具有出色的C2H2捕获能力,达到396.0 mg cm-3的基准存储密度,同时对C2H4(420-97)和CO2(188-53)表现出卓越的选择性。突破性实验证实,m - hof可以有效地分离二元气体混合物,其中C2H2/C2H4(1/99)的分离效率为137.4 mol kg-1, C2H2/CO2(50/50)的分离系数为17。再加上其优异的化学稳定性,这些m - hof在实际应用中显示出巨大的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microporous Metal-Containing Hydrogen-Bonded Organic Frameworks with Benchmark C2H2 Storage Density for Efficient C2H2/C2H4 and C2H2/CO2 Separations.
Separation of C2H2 from industrially important gas pairs using energy-efficient adsorptive techniques with multifunctional porous materials remains a significant yet challenging issue. Here, we report the highly efficient separation of C2H2/CO2 and C2H2/C2H4 mixtures with isostructural metal-containing hydrogen-bonded organic frameworks (M-HOFs), which feature micropore channels decorated with high-density and uncoordinated carboxyl groups. Single-crystal X-ray diffraction analysis reveals that each free carboxyl group is capable of trapping one C2H2 molecule through hydrogen bonding. This endows the M-HOFs with excellent C2H2 capture capability, achieving a benchmark storage density of 396.0 mg cm-3, while simultaneously demonstrating remarkable selectivity over C2H4 (420-97) and CO2 (188-53). Breakthrough experiments confirm that binary gas mixtures can be efficiently separated by M-HOFs, where an impressive C2H4 productivity (137.4 mol kg-1) is realized in the separation of C2H2/C2H4 (1/99), and an outstanding separation factor (17) is achieved for C2H2/CO2 (50/50) splitting. Coupled with their superior chemical stability, these M-HOFs display tremendous potential for practical applications.
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来源期刊
CiteScore
26.60
自引率
6.60%
发文量
3549
审稿时长
1.5 months
期刊介绍: Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.
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