A Systematic Study on the Stability of Porous Coordination Polymers against Ammonia |
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| Authors: | Dr. Takashi Kajiwara Dr. Masakazu Higuchi Daisuke Watanabe Dr. Hideyuki Higashimura Dr. Teppei Yamada Prof. Dr. Hiroshi Kitagawa |
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| Affiliation: | 1. Institute for Integrated Cell‐Material Sciences (WPI‐iCeMS), Kyoto University, 507 ACT Kyoto, 105 Jibucho, Fushimi‐ku, Kyoto 612‐8374 (Japan), Fax: (+81)?75‐634‐8441;2. Advanced Materials Research Laboratory, Sumitomo Chemical Co., Ltd. 6 Kitahara, Tsukuba, Ibaraki 300‐3294 (Japan);3. PRESTO (Japan) Science and Technology Agency (JST), 4‐1‐8 Honcho, Kawaguchi, Saitama 332‐0012 (Japan);4. Hydrogen & New Energy Research Laboratory, Research & Development Division, JX Nippon Oil & Energy Corporation, 8 Chidoricho, Naka‐ku, Yokohama 231‐0815 (Japan);5. Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwakecho, Sakyo‐ku, Kyoto 606‐8502 (Japan), Fax: (+81)?75‐753‐4035;6. Institute for Integrated Cell‐Material Sciences (WPI‐iCeMS), Kyoto University, Yoshida Ushinomiyacho, Sakyo‐ku, Kyoto 606‐8501 (Japan) |
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| Abstract: | To establish a strategy for designing porous coordination polymers (PCPs) for ammonia capture, the first systematic study on the stability of PCPs against ammonia was conducted. Various types of PCPs were investigated by comparing their powder XRD patterns before and after treatment with ammonia. Among the PCPs tested, ZIF‐8, MIL‐53(Al), Al‐BTB, MOF‐76(M) (M=Y or Yb), MIL‐101(Cr), and MOF‐74(Mg) were stable up to 350 °C under an ammonia atmosphere at ambient pressure. The origin of the stability of PCPs is discussed from the viewpoint of their components, metal cations, and organic linkers. Furthermore, adsorption isotherm measurements show that the adsorptive behavior of PCPs is independent of their stability. |
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| Keywords: | adsorption ammonia chemical stability metal– organic frameworks polymers |
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