Rational Construction of an Extrinsic Porous Molecular Crystal with an Extraordinary High Specific Surface Area


  • We would like to thank the German Research Foundation (Deutsche Forschungsgemeinschaft) for funding and the Fonds der Chemischen Industrie for the generous financial support. We thank B. Müller (Ulm University) for collecting the X-ray diffraction data. C. Egger (Ulm University) is gratefully acknowledged for measuring the nitrogen sorption isotherms, G. Weber (Ulm University) for thermal gravimetric analysis and S. Blessing (Ulm University) for recording the PXRD data. Furthermore, we would like to thank H. Sievers and H. Gronegger (both Quantachrome GmbH (Germany)) for helpful discussions.


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Small molecule, large surface area: A rigid triptycene derivative self-assembles by hydrogen bonds to a porous crystal with one-dimensional channels of about 14 Å diameter. Solvents in the channels can be removed to generate an extrinsic porous material with a specific BET surface area of 2796 m2 g−1. Furthermore, gases can be selectively adsorbed within the pores at 1 bar.