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Issue 3, 2011
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Tripodal imidazole frameworks: Reversible vapour sorption both with and without significant structural changes

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Abstract

A series of tripodal imidazole frameworks (TIFs) are reported based on a tripodal, cavity-containing tris(imidazole) derivative. In the case of [Co3Cl6(1)2n(solvent) (TIF-1) which possesses a doubly interpenetrated framework structure, the material exhibits rigid, permanent porosity and selectively absorbs CO2. The non-interpenetrated [Co(1)2(H2O)2]Cl2·4H2O (TIF-2) also absorbs gases and vapours fully reversibly exhibiting a reversible phase change in the process and considerable conditioning and hysteresis. The very highly hydrated [Co(1)2]Cl2·22H2O (TIF-3) irreversibly dehydrates to the layered structure [Co(1)2]Cl2·H2O (TIF-4). A nickel analogue [Ni(1)2]Cl2·22H2O (TIF-5) closely related to TIF-3 is also reported along with two isostructural, non-porous materials [MCl2(1)] (M = Mn, TIF-6; M = Cd, TIF-7) based on d5 and d10Mn(II) and Cd(II). Some of the materials may be prepared by mechanochemical as well as solution based methods. We liken TIF-1 to a gas cylinder, TIF-2 to a sponge and TIF-3 to a fragile soda can that is crushed on emptying to give TIF-4.

Graphical abstract: Tripodal imidazole frameworks: Reversible vapour sorption both with and without significant structural changes

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Publication details

The article was received on 13 Aug 2010, accepted on 06 Oct 2010 and first published on 30 Nov 2010


Article type: Paper
DOI: 10.1039/C0DT01011A
Citation: Dalton Trans., 2011,40, 573-582
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    Tripodal imidazole frameworks: Reversible vapour sorption both with and without significant structural changes

    C. E. Willans, S. French, K. M. Anderson, L. J. Barbour, J. Gertenbach, G. O. Lloyd, R. J. Dyer, P. C. Junk and J. W. Steed, Dalton Trans., 2011, 40, 573
    DOI: 10.1039/C0DT01011A

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