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Molecular gas jars: Methane and carbon dioxide can be stored in open-pore van der Waals crystals of tris-o-phenylenedioxycyclotriphosphazene at low partial pressure, whereas hydrogen, nitrogen, and oxygen are selectively excluded. Gas molecules participate in the supramolecular network of weak interactions and reside in the tight nanochannels in close contact with the surrounding aromatic rings (see picture). Supporting information for this article is available on the WWW under http: //www. wiley-vch. de/contents/jc₂002/2005/z461704ₛ. pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Sozzani et al. (Thu,) studied this question.