論文

査読有り
2013年4月

Pore design of two-dimensional coordination polymers toward selective adsorption

Inorganic Chemistry
  • Yuh Hijikata
  • ,
  • Satoshi Horike
  • ,
  • Masayuki Sugimoto
  • ,
  • Munehiro Inukai
  • ,
  • Tomohiro Fukushima
  • ,
  • Susumu Kitagawa

52
7
開始ページ
3634
終了ページ
3642
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/ic302006x

We have synthesized four porous coordination polymers (PCPs) using Zn 2+, 4,4′-sulfonyldibenzoate (sdb), and four types of dinitrogen linker ligands, 1,4-diazabicyclo[2,2,2]octane (dabco), 1,4-bis(4-pyridyl) benzene (bpb), 3,6-bis(4-pyridyl)-1,2,4,5-tetrazine (bpt), and 4,4′-bipyridyl (bpy). The bent sdb ligands form a rhombic space connected by zinc paddle-wheel units to form a one-dimensional double chain, and each dinitrogen ligand linked the one-dimensional double chains. There are different assembled structures of two-dimensional sheets with the same connectivities between Zn2+ and the organic ligands. [Zn2(sdb) 2(dabco)]n (1) has a noninterpenetrated and noninterdigitated structure, [Zn2(sdb)2(bpb)]n (2) and [Zn2(sdb)2(bpt)]n (3) have interdigitated structures, and [Zn2(sdb)2(bpy)] n (4) has an interpenetrated structure. The length of the dinitrogen ligands dominated their assembled structures and flexibility, which influence the adsorption properties. The flexible frameworks of 2 and 3 provide different stepwise adsorption behaviors for CO2, CH4, C 2H6, and C2H4 affected by their pore diameters and the properties of the gases. Their different adsorption properties were revealed by IR spectroscopy and X-ray analysis under a gas atmosphere. The framework of 4 possesses less flexibility and a smaller void space than the others and a negligible amount of CH4 was adsorbed; however, 4 can adsorb either C2H6 or C2H 4 through the gate-opening phenomenon. Measurement of the solid-state 2H NMR was also carried out to investigate the relationship between the framework structure and the dynamics of bpy with regard to the lower flexibility of 4. We have demonstrated a strategy to control the pore size and assembled structures toward selective adsorption properties of PCPs. © 2013 American Chemical Society.

リンク情報
DOI
https://doi.org/10.1021/ic302006x
J-GLOBAL
https://jglobal.jst.go.jp/detail?JGLOBAL_ID=201302224809719014
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/23496290
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84875783187&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84875783187&origin=inward
URL
http://orcid.org/0000-0003-4830-6888

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