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Proc Natl Acad Sci U S A. 2006 Jul 5;103(27):10186-91. Epub 2006 Jun 23.

Exceptional chemical and thermal stability of zeolitic imidazolate frameworks.

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  • 1Department of Chemistry and Biochemistry, Center for Reticular Materials Research at California NanoSystems Institute, University of California, Los Angeles, CA 90095, USA.

Abstract

Twelve zeolitic imidazolate frameworks (ZIFs; termed ZIF-1 to -12) have been synthesized as crystals by copolymerization of either Zn(II) (ZIF-1 to -4, -6 to -8, and -10 to -11) or Co(II) (ZIF-9 and -12) with imidazolate-type links. The ZIF crystal structures are based on the nets of seven distinct aluminosilicate zeolites: tetrahedral Si(Al) and the bridging O are replaced with transition metal ion and imidazolate link, respectively. In addition, one example of mixed-coordination imidazolate of Zn(II) and In(III) (ZIF-5) based on the garnet net is reported. Study of the gas adsorption and thermal and chemical stability of two prototypical members, ZIF-8 and -11, demonstrated their permanent porosity (Langmuir surface area = 1,810 m(2)/g), high thermal stability (up to 550 degrees C), and remarkable chemical resistance to boiling alkaline water and organic solvents.

PMID:
16798880
[PubMed - indexed for MEDLINE]
PMCID:
PMC1502432
Free PMC Article
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