Solvent-Driven Dynamics: Crafting Tailored Transformations of Cu(II)-Based MOFs

Cheol Yeong Heo, Mariana L. Díaz-Ramírez, Sun Ho Park, Minjung Kang, Chang Seop Hong, Nak Cheon Jeong

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Metal-organic frameworks (MOFs), a sort of crystalline porous coordination polymers composed of metal ions and organic linkers, have been intensively studied for their ability to take up nonpolar gas-phase molecules such as ethane and ethylene. In this context, interpenetrated MOFs, where multiple framework nets are entwined, have been considered promising materials for capturing nonpolar molecules due to their relatively higher stability and smaller micropores. This study explores a solvent-assisted reversible strategy to interpenetrate and deinterpenetrate a Cu(II)-based MOF, namely, MOF-143 (noninterpenetrated form) and MOF-14 (doubly interpenetrated forms). Interpenetration was achieved using protic solvents with small molecular sizes such as water, methanol, and ethanol, while deinterpenetration was accomplished with a Lewis-basic solvent, pyridine. Additionally, this study investigates the adsorptive separation of ethane and ethylene, which is a significant application in the chemical industry. The results showed that interpenetrated MOF-14 exhibited higher ethane and ethylene uptakes compared to the noninterpenetrated MOF-143 due to narrower micropores. Furthermore, we demonstrate that pristine MOF-14 displayed higher ethane selectivity than transformed MOF-14 from MOF-143 by identifying the “fraction of micropore volume” as a key factor influencing ethane uptake. These findings highlight the potential of controlled transformations between interpenetrated and noninterpenetrated MOFs, anticipating that larger MOF crystals with narrower micropores and higher crystallinity will be more suitable for selective gas capture and separation applications.

Original languageEnglish
Pages (from-to)9068-9077
Number of pages10
JournalACS Applied Materials and Interfaces
Volume16
Issue number7
DOIs
Publication statusPublished - 2024 Feb 21

Bibliographical note

Publisher Copyright:
© 2024 American Chemical Society.

Keywords

  • Cu-based paddlewheel MOF
  • deinterpenetration
  • DUT-34
  • ethane capture
  • ethane/ethylene separation
  • ethylene capture
  • MOF-14
  • MOF-143
  • reversible interpenetration

ASJC Scopus subject areas

  • General Materials Science

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