Tuning Multiple Counter-Anions in Porous Coordination Polymers with lcy Topology for Acetylene/Ethylene Separation

• Published in: Inorganic chemistry Vol. 63; no. 8; pp. 3667 - 3674
• Main Authors: Tang, Jie, Shen, Yuebing, He, Xingge, Chen, Meng, Zhao, Haitian, Wang, Yu, Jiang, Junyang, Liu, Penghui, Dang, Rui, Zhang, Mingxing, Qin, Guoping, Bai, Junfeng, Duan, Jingui
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 26.02.2024
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.3c03182

The efficient separation of acetylene (C2H2) and ethylene (C2H4) is an important and complex process in the industry. Herein, we report a new family of lcy-topologic coordination frameworks (termed NTU-90 to NTU-92) with Cu3MF6 (M = Si, Ti, and Zr) nodes. These charged frameworks are compensated by different counterbalanced ions (MF6 2–, BF4 –, and Cl–), yielding changes in the size of the window apertures. Among these frameworks, NTU-92-a (activated NTU-92) shows good adsorption selectivity of C2H2/C2H4 and also significant ability in recovering both highly pure C2H4 (99.95%) and C2H2 (99.98%). Our work not only presents a potential alternative for energy-saving purification of C2 hydrocarbons but also provides a new approach for tuning the function of charged porous materials.