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A flexible interpenetrating coordination framework with a bimodal porous functionality

Nature Materials, ISSN: 1476-4660, Vol: 6, Issue: 2, Page: 142-148
2007
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Article Description

Introducing a functional part into open-framework materials that tunes the pore size/shape and overall porous activity will open new routes in framework engineering and in the fabrication of new materials. We have designed and synthesized a bimodal microporous twofold interpenetrating network [Ni(bpe)"2(N(CN)"2)](N(CN)"2)(5H"2O)(n) (1), with two types of channel for anionic N(CN)"2 (dicyanamide) and neutral water molecules, respectively. The dehydrated framework provides a dual function of specific anion exchange of free N(CN)"2 for the smaller N"3 anions and selective gas sorption. The N"3-exchanged framework leads to a dislocation of the mutual positions of the two interpenetrating frameworks, resulting in an increase in the effective pore size in one of the counterparts of the channels and a higher accommodation of adsorbate than in the as-synthesized framework (1), showing the first case of controlled sorption properties in flexible porous frameworks. © 2007 Nature Publishing Group.

Bibliographic Details

Maji, Tapas Kumar; Matsuda, Ryotaro; Kitagawa, Susumu

Springer Science and Business Media LLC

Chemistry; Materials Science; Physics and Astronomy; Engineering

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