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

Jie Tang; Yuebing Shen; Xingge He; Meng Chen; Haitian Zhao; Yu Wang; Junyang Jiang; Penghui Liu; Rui Dang; Mingxing Zhang; Guoping Qin; Junfeng Bai; Jingui Duan

doi:10.1021/acs.inorgchem.3c03182

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

Inorg Chem. 2024 Feb 26;63(8):3667-3674. doi: 10.1021/acs.inorgchem.3c03182. Epub 2024 Feb 9.

Authors

Affiliations

¹ State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China.
² Nantong University, Nantong, Jiangsu 226019, China.
³ Chongqing Key Laboratory of Photo-Electric Functional Materials, College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, China.

PMID: 38335451
DOI: 10.1021/acs.inorgchem.3c03182

Abstract

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.