@article{Liu2025, 
author = {Xiaoyan Liu and Borong Zhang and Zhaohui Shi and Guanghua Li and Lirong Zhang and Xin Liu and Yunling Liu},
title = {Small changes, big impacts: Ultra-fine tuning of ultra-microporous MOFs with remarkable C2H2 selectivity},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {9},
pages = {94907617},
keywords = {functionalization, isoreticular chemistry, C2H2 separation, ultra-microporous metal-organic frameworks (MOFs)},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907617},
doi = {10.26599/NR.2025.94907617},
abstract = {The efficient separation of acetylene gas (C2H2) from C2H2/C2H4 and C2H2/CH4 is of great significance in various applications due to its high commercial value and numerous practical production scenarios. In this study, a series of ultra-microporous metal-organic frameworks (MOFs) (JLU-MOF161−164) were prepared using mixed-ligand strategy. Drawing upon the principles of isoreticular chemistry, the precise control over ultra-microporous MOFs at a sub-1 Å scale was achieved through functionalization of ligands. The pore sizes decreased from 5.70 to 4.90, 4.24, and 3.74 Å for JLU-MOF161−164. This ultra-fine tuning in pore size significantly improved the selectivity towards C2H2 for the series compounds. The C2H2 adsorption capacity of JLU-MOF164 reached 76.1 cm3·g−1 at 298 K. Notably, the selectivities for C2H2/C2H4 (50/50) and C2H2/CH4 (50/50) achieved remarkable values of 10.1 and 716.7, respectively. Compared with JLU-MOF161, these selectivities were enhanced by 3.6-fold and 9.9-fold, respectively. Breakthrough experiments further validated the outstanding dynamic separation performance and excellent cycling stability of JLU-MOF164, highlighting its significant potential for industrial application.}
}