CCIQS-1: A Dynamic Metal-Organic Framework with Selective Guest-Triggered Porosity Switching

Miriam de J. Velasquez-Hernandez, Valeria B. Lopez-Cervantes, Eva Martinez-Ahumada, Min Tu, Uvaldo Hernandez-Balderas, Diego Martinez-Otero, Daryl R. Williams, Vladimir Martis, Eli Sanchez-Gonzalez, Jong-San Chang, Ji Sun Lee, Jorge Balmaseda, Rob Ameloot*, Ilich A. Ibarra*, Vojtech Jancik*

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung

Abstract

The synergy between porosity and soft properties in metal-organic frameworks (MOFs) can result in materials with adaptability of the pore size/shape to the adsorbate. Herein, we present a new guest-responsive flexible MOF: CCIQS-1. This material consists of threefold interpenetrated subnetworks comprising [Sc3(μ3-O)(H2O)2(OH)(μ-O2CR)6] nodes interconnected by 4,4′-(9,10-anthracenediyl)dibenzoate ligands. This arrangement gives rise to the formation of hydrophilic and hydrophobic channels. Although the activated material is permanently porous, a crystal-to-crystal phase transition takes place upon solvent removal, leading to the contraction of the hydrophobic pores while 1D hydrophilic channels remain open. As a result, CCIQS-1 exhibits a higher affinity for guests with moderate polarity [tetrahydrofuran (THF), MeOH, and acetone] than for non-polar ones (toluene, cyclohexene, and hexane). X-ray diffraction studies on the contracted-pore phase (cp-CCIQS-1) after exposure to different solvents indicate that only adsorbates with a suitable polarity and molecular size trigger the recovery of the open-pore phase (op-CCIQS-1) via the combination of a breathing effect and subnetwork displacement.

Originalspracheenglisch
Seiten (von - bis)669-677
Seitenumfang9
FachzeitschriftChemistry of Materials
Jahrgang34
Ausgabenummer2
DOIs
PublikationsstatusVeröffentlicht - 25 Jan. 2022

ASJC Scopus subject areas

  • Werkstoffchemie
  • Chemische Verfahrenstechnik (insg.)
  • Chemie (insg.)

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