論文

査読有り
2016年5月

Cd-113 Nuclear Magnetic Resonance as a Probe of Structural Dynamics in a Flexible Porous Framework Showing Selective O-2/N-2 and CO2/N-2 Adsorption

INORGANIC CHEMISTRY
  • Ritesh Haldar
  • ,
  • Munehiro Inukai
  • ,
  • Satoshi Horike
  • ,
  • Kazuhiro Uemura
  • ,
  • Susumu Kitagawa
  • ,
  • Tapas Kumar Maji

55
9
開始ページ
4166
終了ページ
4172
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.inorgchem.5b02873
出版者・発行元
AMER CHEMICAL SOC

Two new isomorphous three-dimensional porous coordination polymers, {[Cd(bpe)(0.5)(bdc)(H2O)]center dot EtOH}n (1) and {[Cd(bpe)(0.5)(bdc)(H2O)]center dot 2H(2)O}n (2) [bpe = 1,2-bis(4-pyridyl)ethane, and H2bdc = 1,4-benzenedicarboxylic acid], have been synthesized by altering the solvent media. Both structures contain one-dimensional channels filled with metal-bound water and guest solvent molecules, and desolvated frameworks show significant changes in structure. However, exposure to the solvent vapors (water and methanol) reverts the structure back to the as-synthesized structure, and thus, the reversible flexible nature of the structure was elucidated. The flexibility and permanent porosity were further reinforced from the CO2 adsorption profiles (195 and 273 K) that show stepwise uptake. Moreover, a high selectivity for O-2 over N-2 at 77 K was realized. The framework exhibits interesting solvent vapor adsorption behavior with dynamic structural transformation depending upon the size, polarity, and coordination ability of the solvent molecules. Further investigation was conducted by solid state Cd-113 nuclear magnetic resonance (NMR) spectroscopy that unambiguously advocates the reversible transformation pentagonal-bipyramidal CdO6N -> octahedral CdO5N geometry in the desolvated state. For the first time, Cd-113 NMR has been used as a probe of structural flexibility in a porous coordination polymer system.

Web of Science ® 被引用回数 : 22

リンク情報
DOI
https://doi.org/10.1021/acs.inorgchem.5b02873
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000375519700012&DestApp=WOS_CPL
URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-84968724871&partnerID=MN8TOARS
URL
http://orcid.org/0000-0003-4830-6888

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