A porous framework polymer based on a zinc(II) 4,4′-bipyridine-2,6, 2′,6′-tetracarboxylate: Synthesis, structure, and "zeolite-like" behaviors

Xiang Lin, Alexander J. Blake, Claire Wilson, Xue Zhong Sun, Neil R. Champness, Michael W. George, Peter Hubberstey, Robert Mokaya, Martin Schröder

Research output: Journal PublicationArticlepeer-review

292 Citations (Scopus)

Abstract

The robust metal-organic framework compound {[Zn2(L)] ·4H2O} I has been synthesized by hydrothermal reaction of ZnCl2 and 4,4′-bipyridine-2,6, 2′,6′-tetracarboxylic acid (H4L). Compound I crystallizes in a chiral space group, P42212, with the chirality generated by the helical chains of hydrogen-bonded guest water molecules rather than by the coordination framework. Removal of guest water molecules from the crystal affords the porous material, [Zn2(L)] (II), which has very high thermal stability and is chemically inert. The N 2 isotherm of II at 77 K suggests a uniform porous structure with a BET surface area of 312.7 m2/g and a remarkably strong interaction with N2 molecules (βE0 = 29.6 kJ mol-1). II also exhibits significant gas storage capacities of 1.08 wt % for H 2 at 4 bar and 77 K and 3.14 wt % (44.0 cm3/g, 67 v/v) for methane at 9 Bar at 298 K. The adsorption behavior of II toward organic solvent vapors has also been studied, and isotherms reveal that for different solvent vapors adsorption is dominated by two types of processes, absorbate-absorbate or absorbate-absorbent interactions. The adsorption and desorption kinetic processes in II are determined mainly by the molecular size of the guest species and their interaction with the host.

Original languageEnglish
Pages (from-to)10745-10753
Number of pages9
JournalJournal of the American Chemical Society
Volume128
Issue number33
DOIs
Publication statusPublished - 23 Aug 2006
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (all)
  • Biochemistry
  • Colloid and Surface Chemistry

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