Li Yong-Zhi, Wang Gang-Ding, Ma Li-Na, Hou Lei, Wang Yao-Yu, Zhu Zhonghua
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, National Demonstration Center for Experimental Chemistry Education (Northwest University), College of Chemistry & Materials Science, Northwest University, Xi'an 710069, P. R. China.
School of Chemical Engineering, The University of Queensland, Brisbane 4072, Australia.
ACS Appl Mater Interfaces. 2021 Jan 27;13(3):4102-4109. doi: 10.1021/acsami.0c21554. Epub 2021 Jan 19.
Separation or purification is one of the difficult problems in the petrochemical industry. To help solve the difficulty of separation or purification for CH/CO and CH/CH in the chemical industry, we synthesized a new metal-organic framework (MOF), [Ni(dpip)]·2.5DMF·HO (), by a bipyridyl-substituted isophthalic acid ligand. The MOF includes two types of one-dimensional (1D) tubular channels with different sizes and porous environments. The unique tubular channels lead to not only remarkable gas sorption capacity of CH, CH, and CO, but also good selectivity for CH/CH, CH/CH, CO/CH, and CH/CO, as demonstrated by single-component sorption isotherm results, ideal adsorbed solution theory calculations, and dynamic breakthrough curves. Grand canonical Monte Carlo (GCMC) simulation reveals preferential adsorption sites in the MOF for CO, CH, and CH. The MOF also exhibits an obvious size-selective absorption effect on vapor molecules.
分离或提纯是石化行业中的难题之一。为帮助解决化工行业中CH/CO和CH/CH的分离或提纯难题，我们通过联吡啶取代的间苯二甲酸配体合成了一种新型金属有机框架（MOF），即[Ni(dpip)]·2.5DMF·HO（）。该MOF包含两种具有不同尺寸和多孔环境的一维（1D）管状通道。如单组分吸附等温线结果、理想吸附溶液理论计算和动态突破曲线所示，独特的管状通道不仅使CH、CH和CO具有显著的气体吸附能力，而且对CH/CH、CH/CH、CO/CH和CH/CO具有良好的选择性。巨正则蒙特卡罗（GCMC）模拟揭示了MOF中CO、CH和CH的优先吸附位点。该MOF对蒸汽分子也表现出明显的尺寸选择性吸收效应。
