A Series of Mesoporous Metal-Organic Frameworks with Tunable Windows Sizes and Exceptionally High Ethane over Ethylene Adsorption Selectivity

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The NIIC-20 (NIIC stands for Nikolaev Institute of Inorganic Chemistry) is a family of five isostructural metal-organic frameworks (MOFs) based on dodecanuclear wheel-shaped carboxylate building blocks {Zn12(RCOO)12(glycol)6} (glycol is deprotonated diatomic alcohol: ethylene glycol, 1,2-propanediol, 1,2-butanediol, 1,2-pentanediol or glycerol), quantitatively crystallized from readily available starting chemicals. The crystal structures contain large mesoporous cages of 25 Å connected through {Zn12} rings, of which inner diameter and chemical nature depend solely on the chosen glycol. The NIIC-20 compounds feature high surface area and rarely observed inversed adsorption affinity for saturated hydrocarbon (ethane) over the unsaturated ones (ethylene, acetylene). The corresponding IAST (Ideal Adsorbed Solution Theory) adsorption selectivity factors reach as much as 15.4 for C2H6/C2H4 and 10.9 for C2H6/C2H2 gas mixtures at ambient conditions, exceeding those for any other porous MOF reported so far. The remarkable combination of high adsorption uptakes and high adsorption selectivities makes the NIIC-20 series a new benchmark of porous materials designed for ethylene separation applications.

Original languageEnglish
Pages (from-to)20561-20567
Number of pages7
JournalAngewandte Chemie - International Edition
Volume59
Issue number46
DOIs
Publication statusPublished - 9 Nov 2020

Keywords

  • adsorption
  • alkanes
  • alkenes
  • mesoporous materials
  • metal-organic frameworks
  • DESIGN
  • HYDROCARBONS
  • PERFORMANCE
  • MOFS
  • ETHANE/ETHYLENE
  • IRMOF-8
  • BASIS-SETS
  • SEPARATION
  • COORDINATION FRAMEWORK

Fingerprint Dive into the research topics of 'A Series of Mesoporous Metal-Organic Frameworks with Tunable Windows Sizes and Exceptionally High Ethane over Ethylene Adsorption Selectivity'. Together they form a unique fingerprint.

Cite this