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National Academy of Sciences, Proceedings of the National Academy of Sciences, 27(103), p. 10186-10191, 2006

DOI: 10.1073/pnas.0602439103

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Exceptional chemical and thermal stability of zeolitic imidazolate frameworks

Journal article published in 2006 by Kyo Sung Park ORCID, Zheng Ni, Adrien P. Côté, Jae Yong Choi, Rudan Huang, Fernando J. Uribe-Romo ORCID, Hee K. Chae, Michael O’Keeffe, Omar M. Yaghi
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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°C), and remarkable chemical resistance to boiling alkaline water and organic solvents.