A flexible interpenetrating coordination framework with a bimodal porous functionality

被引:711
作者
Maji, Tapas Kumar [1 ]
Matsuda, Ryotaro [1 ]
Kitagawa, Susumu [1 ]
机构
[1] Kyoto Univ, Grad Sch Engn, Dept Synthet Chem & Biol Chem, Nishikyo Ku, Kyoto 6158510, Japan
关键词
D O I
10.1038/nmat1827
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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))(5H2O)}(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.
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收藏
页码:142 / 148
页数:7
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