JOURNAL ARTICLE

Exceptional chemical and thermal stability of zeolitic imidazolate frameworks

Kyo Sung Park, Zheng Ni, Adrien P Côté, Jae Yong Choi, Rudan Huang, Fernando J Uribe-Romo, Hee K Chae, Michael O'Keeffe, Omar M Yaghi
Proceedings of the National Academy of Sciences of the United States of America 2006 July 5, 103 (27): 10186-10191
16798880
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.

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