Highly controlled acetylene accommodation in a metal–organic microporous material

Ryotaro Matsuda, Ryo Kitaura, Susumu Kitagawa (), Yoshiki Kubota, Rodion V. Belosludov, Tatsuo C. Kobayashi, Hirotoshi Sakamoto, Takashi Chiba, Masaki Takata, Yoshiyuki Kawazoe and Yoshimi Mita
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Ryotaro Matsuda: Kyoto University
Ryo Kitaura: Kyoto University
Susumu Kitagawa: Kyoto University
Yoshiki Kubota: Osaka Prefecture University
Rodion V. Belosludov: Tohoku University
Tatsuo C. Kobayashi: Okayama University
Hirotoshi Sakamoto: Kyoto University
Takashi Chiba: Okayama University
Masaki Takata: Japan Synchrotron Radiation Research Institute/SPring-8
Yoshiyuki Kawazoe: Tohoku University
Yoshimi Mita: Graduate School of Engineering Science, Osaka University

Nature, 2005, vol. 436, issue 7048, 238-241

Abstract: Abstract Metal–organic microporous materials1,2,3,4 (MOMs) have attracted wide scientific attention owing to their unusual structure and properties, as well as commercial interest due to their potential applications in storage5,6,7,8,9, separation10,11 and heterogeneous catalysis12,13. One of the advantages of MOMs compared to other microporous materials, such as activated carbons, is their ability to exhibit a variety of pore surface properties such as hydrophilicity and chirality, as a result of the controlled incorporation of organic functional groups into the pore walls11,13,14,15. This capability means that the pore surfaces of MOMs could be designed to adsorb specific molecules; but few design strategies for the adsorption of small molecules have been established so far. Here we report high levels of selective sorption of acetylene molecules as compared to a very similar molecule, carbon dioxide, onto the functionalized surface of a MOM. The acetylene molecules are held at a periodic distance from one another by hydrogen bonding between two non-coordinated oxygen atoms in the nanoscale pore wall of the MOM and the two hydrogen atoms of the acetylene molecule. This permits the stable storage of acetylene at a density 200 times the safe compression limit of free acetylene at room temperature.

Date: 2005
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DOI: 10.1038/nature03852

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