Anion Regulates scu Topological Porous Coordination Polymers into the Acetylene Trap

Huijie Wang, Yuefeng Duan, Ying Wang, Yuhang Huang, Kai Ge, Suna Wang, Baishu Zheng, Zhaoxu Wang, Junfeng Bai, Jingui Duan

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The development of efficient porous absorbents with high uptake and selectivity remains a great challenge, especially for the recovery of acetylene (C2H2) from its carbon dioxide (CO2)-containing mixtures. Here, we propose and report an anion-planting strategy for regulating the scu topological porous coordination polymers (PCPs) into the C2H2 trap. The three electronegative anions SiF62-, TiF62-, and ZrF62-, in addition to the ligand of 3,5-di(1H-imidazol-1-yl)benzoic acid (HL) and Cu2+ ion, were employed to construct highly porous PCPs (NTU-60, NTU-61, and NTU-62) with varied window aperture. Especially, due to a matching distance (dF-F) of 5.7 Å along the c-axis, the limited space that can be assigned as a single C2H2 trap enables NTU-61 to show optimal ability for C2H2 (van der Waals (vdW) parameters of the two H atoms: ∼5.72 Å) recognition, validated by Grand Canonical Monte Carlo (GCMC) calculations and Raman spectra. These characteristics allow the NTU-series to show higher C2H2 uptake, as well as excellent C2H2/CO2 separation performance under dynamic conditions. The molecular insight and strategy here not only permit balanced adsorption and separation in a single domain but also exhibit an opportunity to develop advanced adsorbents in nearly all frameworks with lattice or coordinated ions, which may act as the platforms for various selective guest trappings with on-demand time and/or spatial resolution.

Original languageEnglish
Pages (from-to)13550-13559
Number of pages10
JournalACS Applied Materials and Interfaces
Volume14
Issue number11
DOIs
StatePublished - 23 Mar 2022

Keywords

  • CH/COseparation
  • CHstorage
  • acetylene trap
  • anion regulating
  • porous coordination polymer

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