Zeolitic Imidazolate Frameworks (ZIFs) are porous inorganic-organic hybrid materials with crystalline three dimensional networks. These contain metal ions tetrahedrally connected to imidazole type linkers mimicking zeolite topologies and thus called Zeolitic Imidazolate Frameworks. We have synthesized two new bisimidazole type linkers (N1E,N4E)-N1,N4-bis((1H-imidazol-2-yl)methylene)benzene-1,4-diamine (BIM-2) and (1E,1'E)-N,N'-((1R,2R)-cyclohexane-1,2-diyl)bis(1-(1H-imidazol-4-yl)methanimine) (BIM-5) by employing Schiff base type reactions of an imidazolecarboxaldehyde with two different types of diamines. These linkers have proven the ability to form new ZIFs when they are reacted with Zn2+ under very mild reaction conditions. These ZIFs have chemically stable porous crystalline structures with thermal stabilities above 300 oC indicating their potential to be used in gas separation, storage and catalysis applications. One of the ZIFs has a low angle peak in the powder X-ray diffraction pattern signaling the presence of large unit cell and hence may have potential applications involving large molecules.

Two novel zeolitic imidazolate frameworks (ZIFs) with high porosity, high thermal and chemical stability

247th National Meeting (2014)

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