Enhanced C_(2)H_(2)/CO_(2) separation in tetranuclear Cu(Ⅱ)cluster-based metal-organic frameworks by adjusting divider length of pore space partition  

作　　者：Fahui Xiang Lu Li Zhen Yuan Wuji Wei Xiaoqing Zheng Shimin Chen Yisi Yang Liangji Chen Zizhu Yao Jianwei Fu Zhangjing Zhang Shengchang Xiang 

机构地区：[1]Fujian Provincial Key Laboratory of Polymer Materials,College of Chemistry and Materials Science,Fujian Normal University Fuzhou 350108,China [2]Institute of Quality Standards and Testing Technology for Agro-Products,Fujian Key Laboratory of Agro-Products Quality and Safety,Fujian Academy of Agricultural Sciences,Fuzhou 350001,China

出　　处：《Chinese Chemical Letters》2025年第3期550-554,共5页中国化学快报(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21975044,21971038,21922810 and 22271046);the Fujian Provincial Department of Science and Technology(Nos.2023J01355,2023J011106 and 2022R1022001).

摘　　要：Achieving efficient adsorption and separation of C_(2)H_(2)/CO_(2)mixtures is a goal that people have always pursued to improve the situation of high energy consumption brought by traditional separation technologies in industry today.High-nuclearity metal cluster-based MOFs with different functionalities are promising for this separation,but it is a complicated and difficult task to precisely control their structures.The strategy of pore-space partition(PSP)is a powerful way to construct this type MOFs,which has the characteristic of isostructural relationship,and can be resulted in a similar performance for them.Therefore,it is an interesting work to explore the effect of MOFs property by adjusting the size of PSP dividers.Herein,three tetranuclear Cu(Ⅱ)cluster-based MOFs(FJU-112/113/114)with dual functionalities has been successfully obtained by PSP strategy with various lengths of divider units.With the highest microporosity and unique functional site,FJU-114 realized a good improvement in the adsorption and separation performance of C_(2)H_(2)/CO_(2).The gas adsorption and lab-scale C_(2)H_(2)/CO_(2)breakthrough experiments demonstrated that FJU-114 exhibits the highest adsorption uptake of 77 cm^(3)/g for C_(2)H_(2),and shows the best separation factor of 4.2 among three MOFs.The GCMC simulation reveals that a stronger adsorption binding site of C_(2)H_(2)in FJU-114a located in the cage II near the unchanged tetranuclear copper node,combined with its high microporosity to achieve the effect of dual functionalities for the improvement performance of C_(2)H_(2)adsorption and separation.

关 键 词：Metal-organic frameworks Dual functionalities Pore space partition C_(2)H_(2)/CO_(2) separation Divider length adjustment 

分 类 号：O64[理学—物理化学]