Selective gas adsorption in one-dimensional, flexible CuII coordination polymers with polar units

Shin Ichiro Noro, Daisuke Tanaka, Hirotoshi Sakamoto, Satoru Shimomura, Susumu Kitagawa, Sadamu Takeda, Kazuhiro Uemura, Hidetoshi Kita, Tomoyuki Akutagawa, Takayoshi Nakamura

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

Introducing polar Cu-PF6 parts into a coordination frameworkwill open new routes in the fabrication of high-performance and/or novel functional porous materials. We have designed and synthesized the one-dimensional Cu II coordination polymer [Cu(PF6)2(bpetha) 2]n (1), with weak and flexible Cu-PF6 parts. 1 shows the property of highly selective adsorption forCO2 and C 2H2 gases,which interact with the F atoms of the polar Cu-PF6 parts. Crystallographic characterization of [Cu(PF 6)2(4-mepy)4] (2) with a basic [Cu(PF 6)2(pyridine)4] structure indicates that 2 forms weak Cu-PF6 bonds at its axial sites and the polarity of the surface in 2 is higher than that in α-[Ni(NCS)2(4-mepy)4]. The axial ligand-exchanged frameworks, [Cu(PF6)1.4(BF4) 0.6(bpetha)2]n (3) and {[Cu(bpetha) 2(DMF)2] 3 2PF6}n (4), enable us to control the onset pressure and maximum adsorption amount for targeted CO2 gases, showing the first case of finely controlled adsorption properties using one-dimensional porous coordination polymers.

Original languageEnglish
Pages (from-to)3346-3355
Number of pages10
JournalChemistry of Materials
Volume21
Issue number14
DOIs
Publication statusPublished - 2009 Jul 28
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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