Metal-ion-dependent gas sorptivity of elastic layer-structured MOFs

Atsushi Kondo, Ayako Chinen, Hiroshi Kajiro, Tomohiro Nakagawa, Kenichi Kato, Masaki Takata, Yoshiyuki Hattori, Fujio Okino, Tomonori Ohba, Katsumi Kaneko, Hirofumi Kanoh

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

Gas adsorptivities of elastic layer-structured (ELS) metal-organic frameworks (MOFs) were analyzed using different metal ions. Single-crystal analyses of ELM-12 (Cu) and ELM-22 (Co) showed that each metal is coordinated by four bpy ligands in equatorial positions and two OTf anions in axial positions in an octahedral geometry to form quite similar two-dimensional square-grid sheets. ELM-12 (Cu) undergoes structural transformation under vacuum heating and its interlayer distances decrease when the hydrogen-bonding networks with and without guest molecules are changed. The weight of the metal species is one of the most important factors impacting the amount of adsorption on the rigid MOFs. The results reveal that by controlling the coordination field of a metal ion the gas adsorptivity of the flexible can be altered and ELMs can be potentially utilized for effective gas separation and storage.

Original languageEnglish
Pages (from-to)7549-7553
Number of pages5
JournalChemistry - A European Journal
Volume15
Issue number31
DOIs
Publication statusPublished - 2009 Aug 3
Externally publishedYes

Keywords

  • Coordination structures
  • Dynamic adsorption
  • Metal-organic frameworks
  • Polymers

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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