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Issue 8, 2016
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Crystal engineering of a family of hybrid ultramicroporous materials based upon interpenetration and dichromate linkers

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Abstract

A new family of 2-fold interpenetrated primitive cubic (pcu) networks of formula [M(L)2(Cr2O7)]n (M = Co2+, Ni2+, Cu2+ and Zn2+; L = 4,4′-azopyridine), DICRO-3-M-i, has been synthesised and their structures, permanent porosity and gas sorption properties were comprehensively characterised. Molecular simulations indicate that CO2 molecules occupy both of the two distinct ultramicropores that run through this isostructural series. The orientation of the Cr2O72− pillars is thought to contribute to high isosteric enthalpy of adsorption (Qst) towards CO2 and temperature programmed desorption experiments reveal that DICRO-3-Ni-i selectively adsorbs CO2 from gas mixtures that simulate flue gas. Performance in this context is among the highest for physisorbents measured to date and these materials are readily regenerated at 50 °C.

Graphical abstract: Crystal engineering of a family of hybrid ultramicroporous materials based upon interpenetration and dichromate linkers

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Publication details

The article was received on 30 Mar 2016, accepted on 10 May 2016 and first published on 10 May 2016


Article type: Edge Article
DOI: 10.1039/C6SC01385F
Citation: Chem. Sci., 2016,7, 5470-5476
  • Open access: Creative Commons BY-NC license
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    Crystal engineering of a family of hybrid ultramicroporous materials based upon interpenetration and dichromate linkers

    H. S. Scott, N. Ogiwara, K. Chen, D. G. Madden, T. Pham, K. Forrest, B. Space, S. Horike, J. J. Perry IV, S. Kitagawa and M. J. Zaworotko, Chem. Sci., 2016, 7, 5470
    DOI: 10.1039/C6SC01385F

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